DRAFT

Acadia National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.8955 4.3123 18.596 0.4601 34.7059 1048

RECON 5.5713 3.831 14.6764 0.8112 32.7184 1048

ASULFATE 2.6572 2.2712 5.1584 0.22 20.5352 1048

ANO3 0.3973 0.4271 0.1824 0.0066 4.8273 1048

OCM 1.8105 1.6945 2.8715 -0.0439 28.4308 1048

LAC 0.2665 0.2071 0.0429 -0.0097 2.0064 1048

SOIL 0.2069 0.1617 0.0262 0.0025 1.8796 1048

SEASALT 0.2328 0.4447 0.1977 0.0005 5.7541 1048

Acadia National Park

Sulfate mass fraction 0.451

Nitrate mass fraction 0.067

OC mass fraction 0.307

LAC mass fraction 0.045

Soil mass fraction 0.035

Seasalt mass fraction 0.039

Missing mass fraction 0.055

Acadia National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.080641 0.084875 0.950122 0.342

ASULFATE 1.22981 0.023791 51.69274 0

ANO3 -0.09865 0.122554 -0.80492 0.421

OCM 1.029738 0.032759 31.43336 0

LAC 0.73063 0.313644 2.329486 0.02

SOIL 1.397692 0.287115 4.868052 0

SEASALT 1.021867 0.100106 10.20784 0

Valid cases: 1048 RSquared: 0.903

Addison Pinnacle

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.5835 3.5741 12.7744 1.5756 17.7838 59

RECON 6.0675 3.7063 13.7363 1.7796 18.6908 59

ASULFATE 2.3938 1.5166 2.3001 0.6376 6.5706 59

ANO3 1.2169 1.5046 2.2637 0.0601 8.2517 59

OCM 1.84 1.225 1.5007 0.5101 6.617 59

LAC 0.2819 0.1699 0.0289 0.0486 0.9533 59

SOIL 0.2418 0.2148 0.0461 0.0124 1.044 59

SEASALT 0.0931 0.079 0.0062 0.0012 0.4055 59

Addison Pinnacle

Sulfate mass fraction 0.429

Nitrate mass fraction 0.218

OC mass fraction 0.33

LAC mass fraction 0.05

Soil mass fraction 0.043

Seasalt mass fraction 0.017

Missing mass fraction -0.087

Appendix 1

1
DRAFT

Addison Pinnacle

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.57666 0.160893 -3.58413 0.001

ASULFATE 1.009239 0.062546 16.13586 0

ANO3 0.773978 0.057783 13.39446 0

OCM 0.899979 0.083698 10.75263 0

LAC 1.750399 0.710304 2.464296 0.017

SOIL 1.52531 0.364213 4.187955 0

SEASALT 3.051359 0.916388 3.329769 0.002

Valid cases: 59 RSquared: 0.983

Agua Tibia

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 6.3753 4.6595 21.7109 0.775 32.2982 102

RECON 7.3578 5.1729 26.7588 0.8028 35.9701 102

ASULFATE 1.8913 1.4778 2.1839 0.1629 7.4584 102

ANO3 1.759 1.4685 2.1565 0.0491 6.1325 102

OCM 2.4636 3.2276 10.4174 0.2781 28.6223 102

LAC 0.2962 0.2331 0.0543 0.0117 1.8895 102

SOIL 0.6437 0.8077 0.6524 0.0295 6.9455 102

SEASALT 0.304 0.3555 0.1264 0.0018 1.8509 102

Agua Tibia

Sulfate mass fraction 0.297

Nitrate mass fraction 0.276

OC mass fraction 0.386

LAC mass fraction 0.046

Soil mass fraction 0.101

Seasalt mass fraction 0.048

Missing mass fraction -0.154

Agua Tibia

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.008752 0.191714 0.045649 0.964

ASULFATE 0.955579 0.072144 13.24544 0

ANO3 0.695247 0.075281 9.235326 0

OCM 0.977191 0.047869 20.4137 0

LAC -0.39169 0.700438 -0.55921 0.577

SOIL 1.180048 0.109567 10.77013 0

SEASALT 0.938554 0.246252 3.81136 0

Valid cases: 102 RSquared: 0.970

Arendtsville

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 10.4327 6.233 38.8503 1.9306 30.9071 102

RECON 11.4742 6.3814 40.7223 2.449 31.5356 102

ASULFATE 4.1931 2.4098 5.8073 0.9347 12.4677 102

ANO3 3.0287 3.0276 9.1663 0.1037 14.2794 102

OCM 3.124 2.2386 5.0112 0.6464 14.7769 102

LAC 0.4702 0.2703 0.0731 0.092 1.7438 102

Appendix 1

2
DRAFT

SOIL 0.3571 0.1985 0.0394 0.0165 0.9926 102

SEASALT 0.301 0.4022 0.1618 0.0003 1.8932 102

Arendtsville

Sulfate mass fraction 0.402

Nitrate mass fraction 0.29

OC mass fraction 0.299

LAC mass fraction 0.045

Soil mass fraction 0.034

Seasalt mass fraction 0.029

Missing mass fraction -0.1

Arendtsville

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.58768 0.224959 -2.6124 0.01

ASULFATE 1.080681 0.046163 23.41017 0

ANO3 1.022114 0.039938 25.59225 0

OCM 0.834548 0.08165 10.22106 0

LAC 1.023122 0.64881 1.57692 0.118

SOIL 0.20927 0.691924 0.302446 0.763

SEASALT 0.76495 0.245595 3.114676 0.002

Valid cases: 102 RSquared: 0.980

Badlands National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.5613 2.7489 7.5563 0.7648 22.5797 641

RECON 4.4261 2.4909 6.2045 0.9324 22.6034 641

ASULFATE 1.5222 1.0612 1.1261 0.1756 8.4604 641

ANO3 0.4519 0.8617 0.7425 -0.0174 8.3317 641

OCM 1.6146 1.3638 1.8599 -0.2524 19.3203 641

LAC 0.1519 0.0942 0.0089 -0.0062 0.7066 641

SOIL 0.638 0.6091 0.3711 0.0435 6.6212 641

SEASALT 0.0476 0.0933 0.0087 0.0002 1.3805 641

Badlands National Park

Sulfate mass fraction 0.334

Nitrate mass fraction 0.099

OC mass fraction 0.354

LAC mass fraction 0.033

Soil mass fraction 0.14

Seasalt mass fraction 0.01

Missing mass fraction 0.03

Badlands National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.0334 0.089171 -0.3746 0.708

ASULFATE 1.136099 0.041058 27.67025 0

ANO3 0.646262 0.052295 12.35789 0

OCM 1.101038 0.043231 25.46896 0

LAC 0.924569 0.651191 1.419811 0.156

SOIL 1.059215 0.070808 14.95891 0

Appendix 1

3
DRAFT

SEASALT -0.43088 0.429926 -1.00222 0.317

Valid cases: 641 RSquared: 0.869

Mount Baldy

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.8647 2.2387 5.0118 0.3754 16.2812 133

RECON 2.9334 2.129 4.5328 0.4318 15.2052 133

ASULFATE 0.7695 0.4665 0.2176 0.0813 2.4304 133

ANO3 0.1528 0.1191 0.0142 -0.0048 0.6254 133

OCM 1.0162 1.0949 1.1988 0.1134 7.7083 133

LAC 0.1055 0.0804 0.0065 0.0129 0.5513 133

SOIL 0.8166 1.2448 1.5496 0.0164 11.7298 133

SEASALT 0.0728 0.0705 0.005 0.0003 0.3335 133

Mount Baldy

Sulfate mass fraction 0.269

Nitrate mass fraction 0.053

OC mass fraction 0.355

LAC mass fraction 0.037

Soil mass fraction 0.285

Seasalt mass fraction 0.025

Missing mass fraction -0.024

Mount Baldy

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.04251 0.072095 -0.5897 0.556

ASULFATE 1.179275 0.068712 17.16252 0

ANO3 1.262401 0.290646 4.343423 0

OCM 0.946313 0.056389 16.78179 0

LAC -0.7459 0.766422 -0.97323 0.332

SOIL 1.149001 0.029159 39.40427 0

SEASALT -0.19672 0.415893 -0.473 0.637

Valid cases: 133 

R-Squared: 0.981

Bandelier National Monument

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.6697 1.8165 3.2997 0.4669 18.7688 778

RECON 3.6316 1.7484 3.0567 0.5646 18.6836 778

ASULFATE 1.0439 0.6083 0.37 0.1362 5.6072 778

ANO3 0.2121 0.2096 0.0439 -0.0308 2.1633 778

OCM 1.5095 1.0983 1.2063 0.1211 13.5279 778

LAC 0.1695 0.1162 0.0135 -0.0164 1.3148 778

SOIL 0.6447 0.6402 0.4099 0.0245 5.6546 778

SEASALT 0.0518 0.1124 0.0126 0.0002 1.5554 778

Bandelier National Monument

Sulfate mass fraction 0.284

Nitrate mass fraction 0.058

OC mass fraction 0.411

LAC mass fraction 0.046

Appendix 1

4
DRAFT

Soil mass fraction 0.176

Seasalt mass fraction 0.014

Missing mass fraction 0.01

Bandelier National Monument

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.181602 0.065606 2.768062 0.006

ASULFATE 1.213093 0.044368 27.34183 0

ANO3 0.537107 0.129605 4.144194 0

OCM 0.846252 0.038216 22.14382 0

LAC 0.579664 0.360827 1.606487 0.109

SOIL 1.120662 0.042336 26.47072 0

SEASALT 0.1853 0.229705 0.806686 0.42

Valid cases: 778 

R-Squared: 0.845

Big Bend National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 6.2749 3.8452 14.7853 0.5155 32.7431 763

RECON 5.9981 3.6087 13.0227 0.654 28.9508 763

ASULFATE 2.3998 1.6023 2.5673 0.1601 11.0368 763

ANO3 0.2638 0.2398 0.0575 0.0128 2.3139 763

OCM 1.6536 1.3036 1.6994 -0.2201 14.5112 763

LAC 0.1704 0.1215 0.0148 -0.0093 0.9723 763

SOIL 1.4457 2.052 4.2107 0.0204 22.8334 763

SEASALT 0.0647 0.1281 0.0164 0.0002 1.8232 763

Big Bend National Park

Sulfate mass fraction 0.382

Nitrate mass fraction 0.042

OC mass fraction 0.264

LAC mass fraction 0.027

Soil mass fraction 0.23

Seasalt mass fraction 0.01

Missing mass fraction 0.044

Big Bend National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.059056 0.073877 0.799372 0.424

ASULFATE 1.083239 0.028704 37.73784 0

ANO3 0.739292 0.168165 4.396231 0

OCM 1.024735 0.045026 22.75889 0

LAC 1.359585 0.501041 2.713518 0.007

SOIL 1.019014 0.019998 50.95499 0

SEASALT 0.337021 0.273636 1.231637 0.218

Valid cases: 763 

R-Squared: 0.940

Bliss State Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.2307 2.2889 5.2392 -0.1229 17.9342 594

RECON 3.298 2.227 4.9595 0.1953 15.6879 594

Appendix 1

5
DRAFT

ASULFAT E 0.6082 0.4792 0.2297 0.0175 2.92 594

ANO3 0.2519 0.2776 0.0771 -0.003 2.9376 594

OCM 1.7235 1.4474 2.095 0.0189 12.0562 594

LAC 0.1721 0.1347 0.0181 -0.0161 0.9464 594

SOIL 0.494 0.9326 0.8697 0.0017 11.8375 594

SEASALT 0.0484 0.0801 0.0064 0.0002 1.324 594

Bliss State Park

Sulfate mass fraction

Nitrate mass fraction

OC mass fraction

LAC mass fraction

Soil mass fraction

Seasalt mass fraction

Missing mass fraction

Bliss State Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.04562 0.05638 0.809166 0.419

ASULFATE 1.25034 0.067227 18.59867 0

ANO3 0.544507 0.110741 4.916946 0

OCM 0.96588 0.038981 24.77815 0

LAC 0.481869 0.420759 1.145239 0.253

SOIL 1.058722 0.03223 32.84875 0

SEASALT 0.348789 0.349158 0.998942 0.318

Valid cases: 594 

R-Squared: 0.914

Blue Mounds

FM 8.3246 5.405 29.2137 1.7883 27.0127 77

RECON 8.3929 5.2109 27.1535 1.8156 24.5503 77

ASULFATE 2.268 2.0503 4.2039 0.3473 11.4151 77

ANO3 3.4109 3.3309 11.0949 0.0975 12.8957 77

OCM 1.7086 0.9416 0.8866 0.4961 5.7965 77

LAC 0.2533 0.1294 0.0168 0.0389 0.6023 77

SOIL 0.6337 0.6296 0.3964 0.0241 4.1654 77

SEASALT 0.1185 0.0945 0.0089 0.0013 0.4673 77

Blue Mounds

Sulfate mass fraction 0.272

Nitrate mass fraction 0.41

OC mass fraction 0.205

LAC mass fraction 0.03

Soil mass fraction 0.076

Seasalt mass fraction 0.014

Missing mass fraction -0.008

Blue Mounds

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.24106 0.163399 -1.4753 0.145

ASULFATE 1.003082 0.040632 24.68707 0

ANO3 1.087176 0.027297 39.82753 0

Appendix 1

6
DRAFT

OCM 1.237595 0.149584 8.273579 0

LAC -1.75157 1.062486 -1.64856 0.104

SOIL 1.086543 0.130608 8.31911 0

SEASALT 1.882048 0.694256 2.710884 0.008

Valid cases: 77 RSquared: 0.990

Bosque del Apache

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.5791 2.0271 4.109 0.6529 16.1269 130

RECON 3.9257 1.9804 3.9222 0.5381 14.8498 130

ASULFATE 0.9589 0.6058 0.367 0.1804 4.697 130

ANO3 0.4128 0.5605 0.3142 0.0348 3.0766 130

OCM 1.3674 0.8215 0.6748 0.1024 5.2888 130

LAC 0.2116 0.1859 0.0346 0.003 1.5205 130

SOIL 0.8798 1.1279 1.2722 0.0742 9.8569 130

SEASALT 0.0953 0.1102 0.0121 0.0007 0.7664 130

Bosque del Apache

Sulfate mass fraction 0.268

Nitrate mass fraction 0.115

OC mass fraction 0.382

LAC mass fraction 0.059

Soil mass fraction 0.246

Seasalt mass fraction 0.027

Missing mass fraction -0.097

Bosque del Apache

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.26178 0.072784 -3.59665 0

ASULFATE 1.340748 0.055584 24.12133 0

ANO3 0.851715 0.071941 11.83901 0

OCM 0.789718 0.056648 13.94086 0

LAC 0.387008 0.219696 1.761557 0.081

SOIL 1.148639 0.029097 39.47649 0

SEASALT 0.329611 0.301337 1.093829 0.276

Valid cases: 130 

R-Squared: 0.972

Bondville

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 9.6921 5.4597 29.8079 2.1482 26.4072 133

RECON 10.2942 5.6173 31.5536 2.3072 32.734 133

ASULFATE 3.0747 2.1461 4.6057 0.6857 12.8401 133

ANO3 4.095 2.9228 8.5427 0.1781 16.1938 133

OCM 2.2323 1.3587 1.8461 0.6172 9.2673 133

LAC 0.3798 0.2 0.04 0.0686 1.1618 133

SOIL 0.3516 0.1936 0.0375 0.02 1.1008 133

SEASALT 0.1608 0.1258 0.0158 0.0032 0.591 133

Bondville

Appendix 1

7
DRAFT

Sulfate mass fraction 0.317

Nitrate mass fraction 0.423

OC mass fraction 0.23

LAC mass fraction 0.039

Soil mass fraction 0.036

Seasalt mass fraction 0.017

Missing mass fraction -0.062

Bondville

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.035677 0.231879 0.153861 0.878

ASULFATE 0.977921 0.064195 15.23371 0

ANO3 1.009982 0.041993 24.05144 0

OCM 0.710482 0.150411 4.723595 0

LAC 1.517152 1.089677 1.392295 0.166

SOIL 0.311331 0.658942 0.472471 0.637

SEASALT 1.505522 0.823583 1.828014 0.07

Valid cases: 133 

R-Squared: 0.963

Boundary Waters Canoe Area

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.5818 3.639 13.2423 0.3537 21.0032 481

RECON 4.5479 3.5221 12.405 0.073 22.4267 481

ASULFATE 1.6989 1.4837 2.2013 0.0533 11.6321 481

ANO3 0.6756 1.3918 1.9371 -0.0264 8.8911 481

OCM 1.6619 1.6776 2.8144 -0.1219 19.9384 481

LAC 0.1619 0.1343 0.018 -0.022 1.2277 481

SOIL 0.2726 0.2653 0.0704 0.0016 1.6074 481

SEASALT 0.0769 0.1488 0.0222 0.0002 1.3597 481

Boundary Waters Canoe Area

Sulfate mass fraction 0.371

Nitrate mass fraction 0.147

OC mass fraction 0.363

LAC mass fraction 0.035

Soil mass fraction 0.06

Seasalt mass fraction 0.017

Missing mass fraction 0.007

Boundary Waters Canoe Area

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.09043 0.061492 -1.47061 0.142

ASULFATE 1.178766 0.027876 42.28579 0

ANO3 0.843755 0.028671 29.42911 0

OCM 1.047039 0.031436 33.30685 0

LAC -0.08193 0.490264 -0.16712 0.867

SOIL 1.321063 0.144043 9.171291 0

SEASALT 0.163411 0.220917 0.739694 0.46

Valid cases: 481 

R-Squared: 0.962

Appendix 1

8
DRAFT

Bryce Canyon National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.9668 1.9905 3.962 0.061 28.5317 814

RECON 2.9022 1.8666 3.4842 0.0971 27.7868 814

ASULFATE 0.8395 0.5158 0.266 0.0653 3.0247 814

ANO3 0.2392 0.2605 0.0679 0.0032 2.3906 814

OCM 1.083 1.1075 1.2265 -0.2293 16.1456 814

LAC 0.1201 0.1149 0.0132 -0.0167 2.1306 814

SOIL 0.5722 0.6263 0.3922 0.0169 7.4204 814

SEASALT 0.0482 0.0833 0.0069 0.0002 1.5146 814

Bryce Canyon National Park

Sulfate mass fraction 0.283

Nitrate mass fraction 0.081

OC mass fraction 0.365

LAC mass fraction 0.04

Soil mass fraction 0.193

Seasalt mass fraction 0.016

Missing mass fraction 0.022

Bryce Canyon National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.00804 0.048999 0.164074 0.87

ASULFATE 1.249304 0.048697 25.6545 0

ANO3 0.496093 0.092249 5.377786 0

OCM 0.775446 0.037082 20.91161 0

LAC 1.163406 0.348274 3.34049 0.001

SOIL 1.406342 0.040174 35.00636 0

SEASALT 0.145897 0.276004 0.528603 0.597

Valid cases: 814 

R-Squared: 0.893

Breton

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 6.2389 3.4966 12.2265 1.7666 20.5012 112

RECON 6.3057 3.2565 10.6045 2.1139 17.5491 112

ASULFATE 2.9489 1.5782 2.4907 0.6391 9.45 112

ANO3 0.6454 0.6231 0.3882 0.0587 4.361 112

OCM 1.5563 1.3008 1.6922 -0.0333 8.78 112

LAC 0.2578 0.1857 0.0345 0.0034 1.3282 112

SOIL 0.5823 1.2546 1.5741 0.0058 9.0175 112

SEASALT 0.3151 0.353 0.1246 0.0023 1.5984 112

Breton

Sulfate mass fraction 0.473

Nitrate mass fraction 0.103

OC mass fraction 0.249

LAC mass fraction 0.041

Soil mass fraction 0.093

Seasalt mass fraction 0.05

Missing mass fraction -0.011

Appendix 1

9
DRAFT

Breton

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.091328 0.191166 0.477742 0.634

ASULFATE 1.160128 0.059379 19.5376 0

ANO3 0.695572 0.172463 4.033173 0

OCM 0.496889 0.141538 3.51063 0.001

LAC 1.755717 1.00983 1.738626 0.085

SOIL 1.513993 0.067585 22.40144 0

SEASALT 0.539636 0.237255 2.274504 0.025

Valid cases: 112 

R-Squared: 0.945

Bridger Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.6246 1.9696 3.8794 0.2778 19.2781 826

RECON 2.5658 1.7969 3.2288 0.1557 19.1804 826

ASULFATE 0.6669 0.3854 0.1485 0.058 2.4946 826

ANO3 0.1516 0.1279 0.0164 -0.0379 1.0105 826

OCM 1.1419 1.2053 1.4527 -0.36 16.7787 826

LAC 0.0958 0.0988 0.0098 -0.0259 1.4152 826

SOIL 0.4696 0.6172 0.381 0.0038 8.2293 826

SEASALT 0.04 0.0516 0.0027 0.0002 0.4162 826

Bridger Wilderness

Sulfate mass fraction 0.254

Nitrate mass fraction 0.058

OC mass fraction 0.435

LAC mass fraction 0.037

Soil mass fraction 0.179

Seasalt mass fraction 0.015

Missing mass fraction 0.022

Bridger Wilderness

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.06831 0.050883 -1.34244 0.18

ASULFATE 1.309393 0.071095 18.41754 0

ANO3 0.509672 0.21341 2.388233 0.017

OCM 0.959476 0.026355 36.40616 0

LAC 0.58771 0.32118 1.829848 0.068

SOIL 1.21641 0.042392 28.69435 0

SEASALT 0.480837 0.45229 1.063115 0.288

Valid cases: 826 

R-Squared: 0.888

Brigantine National Wildlife Refuge 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 9.7364 5.7883 33.505 1.1676 60.5496 640

RECON 9.9046 5.6169 31.5492 1.7899 49.8909 640

ASULFATE 4.7826 3.6466 13.2978 0.6017 33.0928 640

ANO3 1.167 1.1123 1.2372 0.0699 9.0531 640

OCM 2.6831 1.7208 2.9611 0.4246 13.3859 640

LAC 0.4682 0.303 0.0918 0 1.7073 640

Appendix 1

10
DRAFT

SOIL 0.4102 0.5675 0.3221 0.0232 7.8298 640

SEASALT 0.3936 0.667 0.445 0.0003 5.1111 640

Brigantine National Wildlife Refuge 

Sulfate mass fraction 0.491

Nitrate mass fraction 0.12

OC mass fraction 0.276

LAC mass fraction 0.048

Soil mass fraction 0.042

Seasalt mass fraction 0.04

Missing mass fraction -0.017

Brigantine National Wildlife Refuge 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.217238 0.131457 1.652534 0.099

ASULFATE 1.083929 0.01959 55.33053 0

ANO3 0.537565 0.063082 8.521689 0

OCM 1.107838 0.0631 17.55692 0

LAC -0.26445 0.329914 -0.80157 0.423

SOIL 1.182465 0.102723 11.51117 0

SEASALT 0.950719 0.090227 10.53699 0

Valid cases: 640 

R-Squared: 0.942

Brooklyn Lake 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.0213 1.739 3.0241 0.0604 8.5212 113

RECON 2.0707 1.6781 2.816 0.0844 8.8227 113

ASULFATE 0.5755 0.3478 0.121 0.0622 1.5246 113

ANO3 0.1338 0.1087 0.0118 -0.0157 0.6333 113

OCM 0.8209 1.0859 1.1792 -0.0711 5.803 113

LAC 0.0746 0.0765 0.0058 0.0032 0.5171 113

SOIL 0.4019 0.4773 0.2279 0.0065 3.2712 113

SEASALT 0.064 0.1224 0.015 0.001 1.2181 113

Brooklyn Lake 

Sulfate mass fraction 0.285

Nitrate mass fraction 0.066

OC mass fraction 0.406

LAC mass fraction 0.037

Soil mass fraction 0.199

Seasalt mass fraction 0.032

Missing mass fraction -0.024

Brooklyn Lake 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.025176 0.063622 0.395718 0.693

ASULFATE 1.040203 0.110117 9.446352 0

ANO3 0.305442 0.325848 0.937377 0.351

OCM 1.098909 0.068294 16.0908 0

LAC -1.62681 0.999315 -1.62792 0.107

Appendix 1

11
DRAFT

SOIL 1.480085 0.072931 20.29423 0

SEASALT -0.29531 0.269128 -1.09727 0.275

Valid cases: 113 

R-Squared: 0.967

Bridgton

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.818 2.7983 7.8307 1.0194 24.5656 119

RECON 4.3475 2.9407 8.6477 1.3269 25.5394 119

ASULFATE 1.7001 1.7854 3.1876 0.4092 17.7375 119

ANO3 0.388 0.3325 0.1105 0.0241 2.023 119

OCM 1.7138 1.2189 1.4857 0.3292 8.125 119

LAC 0.2222 0.1326 0.0176 0.0184 0.71 119

SOIL 0.1733 0.1657 0.0274 0.0045 1.2231 119

SEASALT 0.1502 0.2222 0.0494 0.0025 1.6368 119

Bridgton

Sulfate mass fraction 0.445

Nitrate mass fraction 0.102

OC mass fraction 0.449

LAC mass fraction 0.058

Soil mass fraction 0.045

Seasalt mass fraction 0.039

Missing mass fraction -0.139

Bridgton

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.01015 0.088885 -0.11414 0.909

ASULFATE 1.044514 0.027693 37.71707 0

ANO3 0.402703 0.144518 2.786522 0.006

OCM 0.790706 0.051718 15.28881 0

LAC 1.43083 0.512527 2.791718 0.006

SOIL 1.096624 0.244502 4.485123 0

SEASALT 0.220174 0.182101 1.209073 0.229

Valid cases: 119 

R-Squared: 0.979

Casco Bay

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.3406 4.3601 19.0107 0.6557 40.9052 166

RECON 5.954 5.2865 27.9474 0.9206 55.9276 166

ASULFATE 1.9278 1.3902 1.9325 0.2489 8.2901 166

ANO3 0.5347 0.5108 0.261 0.0402 2.5583 166

OCM 2.672 4.3035 18.5198 0.2389 51.665 166

LAC 0.322 0.2866 0.0822 0.0181 2.52 166

SOIL 0.2626 0.3696 0.1366 0.0094 3.913 166

SEASALT 0.2349 0.4202 0.1766 0.0017 3.2797 166

Casco Bay

Sulfate mass fraction 0.361

Nitrate mass fraction 0.1

Appendix 1

12
DRAFT

OC mass fraction 0.5

LAC mass fraction 0.06

Soil mass fraction 0.049

Seasalt mass fraction 0.044

Missing mass fraction -0.115

Casco Bay

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.3119 0.083679 -3.72739 0

ASULFATE 1.16512 0.038082 30.59465 0

ANO3 0.56387 0.109618 5.143969 0

OCM 0.646324 0.018275 35.36679 0

LAC 2.515946 0.313452 8.026575 0

SOIL 1.098562 0.124875 8.797326 0

SEASALT 1.189328 0.106933 11.12223 0

Valid cases: 166 

R-Squared: 0.985

Cabinet Mountains

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.4026 4.2297 17.8902 -0.0992 31.7842 143

RECON 3.6029 4.3805 19.1888 0.1573 35.2498 143

ASULFATE 0.5597 0.4003 0.1602 0.0313 2.556 143

ANO3 0.1832 0.1292 0.0167 -0.0334 0.5933 143

OCM 2.138 3.6543 13.3538 -0.0979 30.4963 143

LAC 0.1556 0.2187 0.0479 -0.0033 1.8939 143

SOIL 0.4715 0.6958 0.4841 0.0072 4.5503 143

SEASALT 0.095 0.1413 0.02 0.0005 1.1764 143

Cabinet Mountains

Sulfate mass fraction 0.164

Nitrate mass fraction 0.054

OC mass fraction 0.628

LAC mass fraction 0.046

Soil mass fraction 0.139

Seasalt mass fraction 0.028

Missing mass fraction -0.059

Cabinet Mountains

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.01861 0.07993 -0.23285 0.816

ASULFATE 1.457767 0.151174 9.642982 0

ANO3 -0.13867 0.371479 -0.37329 0.71

OCM 1.137308 0.037501 30.32766 0

LAC -2.7782 0.641476 -4.33096 0

SOIL 1.188857 0.074353 15.98939 0

SEASALT 0.747983 0.287199 2.604404 0.01

Valid cases: 143 

R-Squared: 0.988

Cape Cod

Variable Mean Std Dev Variance Minimum Maximum Valid

Appendix 1

13
DRAFT

FM 5.1243 3.6053 12.9981 1.4008 32.1687 175

RECON 5.3369 3.5175 12.3731 1.4167 29.756 175

ASULFATE 2.1591 1.8773 3.5243 0.4701 20.2756 175

ANO3 0.6189 0.5249 0.2755 0.0663 3.0076 175

OCM 1.4372 1.246 1.5524 0.1098 11.3812 175

LAC 0.159 0.1206 0.0145 -0.0063 0.7445 175

SOIL 0.2619 0.5835 0.3404 0.0147 7.0449 175

SEASALT 0.7008 0.7928 0.6285 0.0046 4.6727 175

Cape Cod

Sulfate mass fraction 0.421

Nitrate mass fraction 0.121

OC mass fraction 0.28

LAC mass fraction 0.031

Soil mass fraction 0.051

Seasalt mass fraction 0.137

Missing mass fraction -0.042

Cape Cod

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.223735 0.108157 2.06862 0.04

ASULFATE 1.25489 0.035297 35.55186 0

ANO3 0.505264 0.13096 3.85815 0

OCM 0.901692 0.06559 13.74748 0

LAC -2.10344 0.731598 -2.87512 0.005

SOIL 1.312258 0.096406 13.61179 0

SEASALT 0.817989 0.068579 11.92763 0

Valid cases: 175 

R-Squared: 0.971

Caney Creek

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 6.1283 4.3217 18.677 0.3639 22.5541 45

RECON 6.9237 4.293 18.43 0.5404 18.7717 45

ASULFATE 2.4861 2.1401 4.5801 0.1362 10.5377 45

ANO3 0.977 1.1365 1.2915 0.1107 5.3365 45

OCM 2.6002 1.7093 2.9217 0.2194 6.2386 45

LAC 0.2589 0.1451 0.021 0.0282 0.7126 45

SOIL 0.4207 0.3625 0.1314 0.0411 2.08 45

SEASALT 0.1807 0.2801 0.0785 0.0002 1.2088 45

Caney Creek

Sulfate mass fraction 0.406

Nitrate mass fraction 0.159

OC mass fraction 0.424

LAC mass fraction 0.042

Soil mass fraction 0.069

Seasalt mass fraction 0.029

Missing mass fraction -0.13

Caney Creek

Variable Estimate Std Error t-value Prob>|t|

Appendix 1

14
DRAFT

CONSTANT -0.49994 0.232118 -2.1538 0.038

ASULFATE 1.269716 0.068877 18.43454 0

ANO3 0.354531 0.136117 2.604606 0.013

OCM 0.707848 0.202851 3.489503 0.001

LAC 5.150637 2.167525 2.376275 0.023

SOIL 0.074185 0.436914 0.169793 0.866

SEASALT -0.44355 0.46808 -0.9476 0.349

Valid cases: 45 RSquared: 0.975

Cadiz

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 9.5947 4.9551 24.5534 0.5674 25.7937 47

RECON 10.387 4.9358 24.3626 0.7046 26.6816 47

ASULFATE 4.3594 2.7561 7.5959 0.1761 15.2525 47

ANO3 2.3651 2.3035 5.3061 0.0878 8.7444 47

OCM 2.7141 1.4166 2.0068 0.2902 6.4037 47

LAC 0.3854 0.1768 0.0313 0.0618 0.7744 47

SOIL 0.395 0.2487 0.0619 0.056 1.2268 47

SEASALT 0.1681 0.2376 0.0565 0.0027 1.1281 47

Cadiz

Sulfate mass fraction 0.454

Nitrate mass fraction 0.246

OC mass fraction 0.283

LAC mass fraction 0.04

Soil mass fraction 0.041

Seasalt mass fraction 0.018

Missing mass fraction -0.083

Cadiz

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.45937 0.284912 -1.61232 0.115

ASULFATE 1.094544 0.051358 21.31221 0

ANO3 1.025006 0.060298 16.99904 0

OCM 1.183206 0.103992 11.37785 0

LAC -0.73449 0.999576 -0.7348 0.467

SOIL -0.47756 0.532846 -0.89624 0.375

SEASALT 0.706711 0.475441 1.486432 0.145

Valid cases: 47 RSquared: 0.983

Canyonlands National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.4331 1.9292 3.7219 0.4299 24.9403 815

RECON 3.2042 1.7229 2.9685 0.4235 20.7527 815

ASULFATE 1.0099 0.5406 0.2922 0.0002 4.1623 815

ANO3 0.2248 0.2938 0.0863 0.0204 3.608 815

OCM 1.0369 0.8441 0.7125 -0.4345 9.383 815

LAC 0.1262 0.0874 0.0076 -0.0256 1.0311 815

SOIL 0.7545 0.9124 0.8325 0.0002 16.6316 815

SEASALT 0.052 0.0749 0.0056 0.0002 1.3639 815

Appendix 1

15
DRAFT

Canyonlands National Park

Sulfate mass fraction 0.294

Nitrate mass fraction 0.065

OC mass fraction 0.302

LAC mass fraction 0.037

Soil mass fraction 0.22

Seasalt mass fraction 0.015

Missing mass fraction 0.067

Canyonlands National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.139064 0.057457 2.420301 0.016

ASULFATE 1.097126 0.045963 23.86979 0

ANO3 0.55164 0.086582 6.371322 0

OCM 0.966892 0.04183 23.11484 0

LAC 1.017909 0.419123 2.428661 0.015

SOIL 1.213135 0.025768 47.07963 0

SEASALT 0.302274 0.305657 0.988931 0.323

Valid cases: 815 

R-Squared: 0.888

Capitol Reef

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.3592 1.3662 1.8664 0.0898 6.2351 135

RECON 2.482 1.1625 1.3514 0.5206 6.0887 135

ASULFATE 0.691 0.428 0.1831 0.1189 2.8887 135

ANO3 0.2995 0.3354 0.1125 0.0123 1.8035 135

OCM 0.7657 0.566 0.3204 0.09 4.1303 135

LAC 0.0972 0.0566 0.0032 0.0128 0.4492 135

SOIL 0.5636 0.5713 0.3264 0.0344 2.7952 135

SEASALT 0.065 0.0618 0.0038 0.0007 0.3219 135

Capitol Reef

Sulfate 0.293

Nitrate 0.127

OC 0.325

LAC 0.041

Soil 0.239

seasalt 0.028

Missing -0.052

Capitol Reef

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.2569 0.07483 -3.43318 0.001

ASULFATE 1.06531 0.073184 14.55656 0

ANO3 0.517966 0.105853 4.893279 0

OCM 0.972412 0.065157 14.9242 0

LAC 1.227025 0.700854 1.750757 0.082

SOIL 1.468197 0.053137 27.63028 0

SEASALT 0.515767 0.474465 1.08705 0.279

Appendix 1

16
DRAFT

Valid cases: 135 

R-Squared: 0.944

Cedar Bluff

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 6.3179 4.7653 22.708 1.0561 19.0317 62

RECON 6.3923 4.3615 19.023 1.2023 17.3888 62

ASULFATE 1.9206 1.6855 2.841 0.2379 7.7894 62

ANO3 1.897 2.6087 6.8055 0.0491 11.2387 62

OCM 1.5381 1.1234 1.262 0.2059 5.4862 62

LAC 0.1909 0.1139 0.013 0.0351 0.6469 62

SOIL 0.7506 0.6699 0.4488 0.1657 4.3151 62

SEASALT 0.0952 0.0728 0.0053 0.007 0.2842 62

Cedar Bluff

Sulfate mass fraction 0.304

Nitrate mass fraction 0.3

OC mass fraction 0.243

LAC mass fraction 0.03

Soil mass fraction 0.119

Seasalt mass fraction 0.015

Missing mass fraction -0.012

Cedar Bluff

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.71673 0.184192 -3.89123 0

ASULFATE 1.039718 0.074753 13.90864 0

ANO3 1.153325 0.04203 27.44078 0

OCM 0.978563 0.163092 6.000077 0

LAC 0.140717 1.670913 0.084215 0.933

SOIL 1.458706 0.142497 10.23678 0

SEASALT 2.343553 1.227476 1.909245 0.061

Valid cases: 62 RSquared: 0.984

Chassahowitzka National Wildlife Refuge 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 9.4303 4.3283 18.7343 1.6211 32.3248 488

RECON 9.484 4.1113 16.9026 2.7465 37.1267 488

ASULFATE 4.0198 2.4206 5.8593 0.5482 16.8868 488

ANO3 0.5721 0.2688 0.0722 0.0764 1.6659 488

OCM 3.1815 1.7969 3.229 0.6057 14.1284 488

LAC 0.5597 0.3842 0.1476 0.0208 3.089 488

SOIL 0.9113 2.1951 4.8185 0.0362 29.6136 488

SEASALT 0.2397 0.3817 0.1457 0.0007 3.1736 488

Chassahowitzka National Wildlife Refuge 

Sulfate mass fraction 0.426

Nitrate mass fraction 0.061

OC mass fraction 0.337

LAC mass fraction 0.059

Soil mass fraction 0.097

Appendix 1

17
DRAFT

Seasalt mass fraction 0.025

Missing mass fraction -0.006

Chassahowitzka National Wildlife Refuge 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.305043 0.171173 1.782075 0.075

ASULFATE 1.170362 0.0239 48.97005 0

ANO3 0.57062 0.224672 2.539792 0.011

OCM 0.800855 0.051021 15.69646 0

LAC 0.901182 0.237646 3.792117 0

SOIL 0.986999 0.025715 38.38289 0

SEASALT 0.594842 0.164168 3.623379 0

Valid cases: 488 

R-Squared: 0.924

Cherokee Nation

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.948 2.9723 8.8345 0.551 12.5849 43

RECON 6.6089 3.0495 9.2995 2.3392 12.8358 43

ASULFATE 1.7764 1.1757 1.3824 0.3137 5.2393 43

ANO3 1.6066 1.7552 3.0808 0.1462 6.4623 43

OCM 2.1159 0.8983 0.8069 0.7126 4.3276 43

LAC 0.2739 0.1181 0.0139 0.1118 0.5666 43

SOIL 0.7324 0.5466 0.2988 0.0278 2.7036 43

SEASALT 0.1036 0.0733 0.0054 0.0045 0.3489 43

Cherokee Nation

Sulfate mass fraction 0.299

Nitrate mass fraction 0.27

OC mass fraction 0.356

LAC mass fraction 0.046

Soil mass fraction 0.123

Seasalt mass fraction 0.017

Missing mass fraction -0.111

Cherokee Nation

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.43106 0.264178 -1.63171 0.111

ASULFATE 1.000958 0.106306 9.415819 0

ANO3 1.070331 0.068016 15.7365 0

OCM 1.081947 0.172051 6.288539 0

LAC -2.1954 1.404 -1.56368 0.127

SOIL 1.671686 0.196544 8.505408 0

SEASALT -0.29858 1.313418 -0.22733 0.821

Valid cases: 43 RSquared: 0.968

Chiricahua National Monument 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.1974 2.2944 5.2641 0.3251 22.5294 886

RECON 3.8563 2.1144 4.4706 0.4874 19.5604 886

ASULFATE 1.35 0.8243 0.6794 0.0799 7.0814 886

Appendix 1

18
DRAFT

ANO3 0.1859 0.1504 0.0226 -0.0155 0.9474 886

OCM 1.1698 1.1529 1.3291 0.0238 15.241 886

LAC 0.1331 0.1079 0.0116 -0.032 2.2866 886

SOIL 0.9482 0.9451 0.8931 0.0166 9.7907 886

SEASALT 0.0693 0.0984 0.0097 0.0002 1.3388 886

Chiricahua National Monument 

Sulfate mass fraction 0.322

Nitrate mass fraction 0.044

OC mass fraction 0.279

LAC mass fraction 0.032

Soil mass fraction 0.226

Seasalt mass fraction 0.017

Missing mass fraction 0.081

Chiricahua National Monument 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.072457 0.064215 1.128358 0.259

ASULFATE 1.280876 0.03392 37.76216 0

ANO3 0.793105 0.217501 3.646449 0

OCM 0.754568 0.034849 21.65249 0

LAC 1.586116 0.363103 4.368225 0

SOIL 1.153301 0.03242 35.57351 0

SEASALT 0.878127 0.290811 3.019583 0.003

Valid cases: 886 

R-Squared: 0.883

Cloud Peak

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.4241 2.834 8.0314 -0.155 15.0463 72

RECON 2.5453 2.8236 7.9724 0.1381 14.0377 72

ASULFATE 0.5753 0.4558 0.2077 0.0177 2.6898 72

ANO3 0.1476 0.1324 0.0175 0.0132 0.6298 72

OCM 1.3692 2.2239 4.9459 -0.0331 10.9505 72

LAC 0.0915 0.1264 0.016 0 0.6153 72

SOIL 0.2626 0.2257 0.0509 0.0113 1.4393 72

SEASALT 0.0991 0.1433 0.0205 0.0007 1.1273 72

Cloud Peak

Sulfate mass fraction 0.237

Nitrate mass fraction 0.061

OC mass fraction 0.565

LAC mass fraction 0.038

Soil mass fraction 0.108

Seasalt mass fraction 0.041

Missing mass fraction -0.05

Cloud Peak

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.04371 0.087529 -0.49933 0.619

ASULFATE 1.254653 0.153072 8.1965 0

ANO3 -0.33836 0.417797 -0.80987 0.421

Appendix 1

19
DRAFT

OCM 0.948197 0.088445 10.7207 0

LAC 1.64021 1.639441 1.000469 0.321

SOIL 1.375447 0.262158 5.246627 0

SEASALT -0.13754 0.380738 -0.36126 0.719

Valid cases: 72 RSquared: 0.981

Columbia Gorge

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.5675 3.1655 10.0201 0.2828 23.8283 229

RECON 4.9795 3.281 10.7651 0.9962 25.2197 229

ASULFATE 1.0235 0.7496 0.5618 0.004 3.8052 229

ANO3 0.5217 0.4026 0.1621 -0.0037 2.5267 229

OCM 2.3719 2.0951 4.3895 0.4304 18.4016 229

LAC 0.2604 0.1742 0.0303 0.0584 1.6776 229

SOIL 0.3964 1.1013 1.2128 0 15.0192 229

SEASALT 0.4056 0.5742 0.3298 0.0003 4.3635 229

Columbia Gorge

Sulfate mass fraction 0.224

Nitrate mass fraction 0.114

OC mass fraction 0.519

LAC mass fraction 0.057

Soil mass fraction 0.087

Seasalt mass fraction 0.089

Missing mass fraction -0.09

Columbia Gorge

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.142864 0.146202 0.97717 0.33

ASULFATE 1.591427 0.118209 13.46287 0

ANO3 -0.01689 0.215262 -0.07846 0.938

OCM 0.910908 0.052179 17.45738 0

LAC -0.5532 0.623571 -0.88716 0.376

SOIL 1.057278 0.061294 17.24918 0

SEASALT 0.909525 0.115559 7.870687 0

Valid cases: 229 RSquared: 0.910

Connecticut Hill

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 6.0772 5.1661 26.6886 1.2626 31.2221 92

RECON 6.5926 4.7759 22.8089 1.803 26.3036 92

ASULFATE 2.9848 3.016 9.0961 0.4726 18.4628 92

ANO3 1.0995 1.2639 1.5975 0.0511 6.3784 92

OCM 1.8451 1.3438 1.8058 0.4018 7.3714 92

LAC 0.262 0.1617 0.0262 0.0473 0.7867 92

SOIL 0.2702 0.2741 0.0751 0.0125 1.6617 92

SEASALT 0.131 0.1532 0.0235 0.003 0.8972 92

Connecticut Hill

Sulfate mass fraction 0.491

Appendix 1

20
DRAFT

Nitrate mass fraction 0.181

OC mass fraction 0.304

LAC mass fraction 0.043

Soil mass fraction 0.044

Seasalt mass fraction 0.022

Missing mass fraction -0.085

Connecticut Hill

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.65412 0.136942 -4.77659 0

ASULFATE 1.193452 0.036538 32.66331 0

ANO3 0.740541 0.065272 11.34555 0

OCM 0.984018 0.086864 11.32831 0

LAC 0.353879 0.860327 0.411331 0.682

SOIL 1.543239 0.320998 4.807623 0

SEASALT 0.225468 0.491478 0.458755 0.648

Valid cases: 92 RSquared: 0.986

Columbia River Gorge

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.0294 3.3366 11.1327 0.6614 26.402 499

RECON 5.4636 3.5979 12.9447 0.6316 25.5758 499

ASULFATE 1.1771 0.8641 0.7466 0.0928 6.0709 499

ANO3 0.6841 1.118 1.25 -0.0155 10.6219 499

OCM 2.4425 1.9178 3.6781 0.1948 15.4314 499

LAC 0.3554 0.2495 0.0623 0.0215 1.409 499

SOIL 0.5858 0.877 0.7691 0.0258 16.8128 499

SEASALT 0.2187 0.3629 0.1317 0.0003 3.3519 499

Columbia River Gorge

Sulfate mass fraction 0.234

Nitrate mass fraction 0.136

OC mass fraction 0.486

LAC mass fraction 0.071

Soil mass fraction 0.116

Seasalt mass fraction 0.043

Missing mass fraction -0.086

Columbia River Gorge

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.03716 0.078691 -0.4722 0.637

ASULFATE 1.327388 0.049502 26.81494 0

ANO3 0.599314 0.037392 16.02804 0

OCM 0.885761 0.03269 27.09561 0

LAC 0.161164 0.242323 0.665077 0.506

SOIL 1.136597 0.042876 26.50899 0

SEASALT 0.948537 0.099963 9.488912 0

Valid cases: 499 

R-Squared: 0.945

Crescent Lake

Appendix 1

21
DRAFT

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.4253 3.4431 11.8547 0.8643 13.3972 52

RECON 4.4314 3.307 10.936 0.9272 13.7116 52

ASULFATE 1.0318 0.7597 0.5771 0.1906 3.3855 52

ANO3 1.2853 2.018 4.0722 0.0541 7.7534 52

OCM 1.4793 1.5944 2.5422 0.2243 9.3859 52

LAC 0.1306 0.1063 0.0113 0.012 0.6244 52

SOIL 0.4407 0.2966 0.088 0.0134 1.1192 52

SEASALT 0.0638 0.0566 0.0032 0.0007 0.2603 52

Crescent Lake

Sulfate mass fraction 0.233

Nitrate mass fraction 0.29

OC mass fraction 0.334

LAC mass fraction 0.03

Soil mass fraction 0.1

Seasalt mass fraction 0.014

Missing mass fraction -0.001

Crescent Lake

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.15038 0.222034 -0.67726 0.502

ASULFATE 0.804392 0.244493 3.290044 0.002

ANO3 1.094424 0.092352 11.85054 0

OCM 1.132822 0.170752 6.634329 0

LAC -0.0595 2.636207 -0.02257 0.982

SOIL 1.397878 0.34242 4.082349 0

SEASALT 0.864096 1.746494 0.49476 0.623

Valid cases: 52 RSquared: 0.968

Crater Lake National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.7057 2.6502 7.0233 0.0313 30.6278 683

RECON 2.6629 2.61 6.8119 0.2164 33.2459 683

ASULFATE 0.4421 0.3393 0.1151 0.0047 2.0694 683

ANO3 0.1184 0.1836 0.0337 -0.0405 2.822 683

OCM 1.4345 1.9774 3.9101 -0.0547 29.8436 683

LAC 0.1931 0.1925 0.0371 -0.0096 2.175 683

SOIL 0.408 0.7052 0.4973 0.0008 14.4446 683

SEASALT 0.0668 0.1023 0.0105 0.0003 1.072 683

Crater Lake National Park

Sulfate mass fraction 0.163

Nitrate mass fraction 0.044

OC mass fraction 0.53

LAC mass fraction 0.071

Soil mass fraction 0.151

Seasalt mass fraction 0.025

Missing mass fraction 0.016

Appendix 1

22
DRAFT

Crater Lake National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.02014 0.049639 -0.40571 0.685

ASULFATE 1.684951 0.096436 17.47226 0

ANO3 0.208914 0.156509 1.334836 0.182

OCM 0.934796 0.016365 57.12325 0

LAC 0.478301 0.158812 3.011734 0.003

SOIL 1.101526 0.040177 27.41681 0

SEASALT 1.098518 0.249627 4.400637 0

Valid cases: 683 RSquared: 0.938

Craters of the Moon National Monument

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.2445 2.9753 8.8526 0.0307 19.2304 120

RECON 3.3914 2.8018 7.8501 0.5577 18.883 120

ASULFATE 0.5502 0.3286 0.1079 0.0003 1.7207 120

ANO3 0.3414 0.4656 0.2167 0.0231 2.5835 120

OCM 1.612 2.1212 4.4995 0.0916 15.6476 120

LAC 0.1237 0.1321 0.0174 0 0.9027 120

SOIL 0.6866 0.8491 0.721 0 4.7228 120

SEASALT 0.0775 0.0862 0.0074 0.0005 0.4929 120

Craters of the Moon National Monument

Sulfate mass fraction 0.17

Nitrate mass fraction 0.105

OC mass fraction 0.497

LAC mass fraction 0.038

Soil mass fraction 0.212

Seasalt mass fraction 0.024

Missing mass fraction -0.045

Craters of the Moon National Monument

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.17339 0.07326 -2.36673 0.02

ASULFATE 1.3959 0.140293 9.949879 0

ANO3 0.696675 0.079547 8.75802 0

OCM 1.205683 0.047902 25.16969 0

LAC -2.92338 0.770366 -3.79479 0

SOIL 1.211066 0.052928 22.88122 0

SEASALT -0.01886 0.391885 -0.04812 0.962

Valid cases: 120 

R-Squared: 0.986

Denali National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 1.7447 1.6641 2.7691 -0.6975 24.6683 870

RECON 1.6436 1.5072 2.2715 0.0586 22.2436 870

ASULFATE 0.5283 0.4329 0.1874 0.0267 2.7295 870

ANO3 0.0672 0.0766 0.0059 -0.0215 0.7694 870

OCM 0.6759 1.1834 1.4005 -0.0902 19.255 870

Appendix 1

23
DRAFT

LAC 0.08 0.0767 0.0059 -0.0482 0.796 870

SOIL 0.1901 0.2579 0.0665 0.003 3.2478 870

SEASALT 0.1022 0.2288 0.0524 0.0002 3.7108 870

Denali National Park

Sulfate mass fraction 0.303

Nitrate mass fraction 0.038

OC mass fraction 0.387

LAC mass fraction 0.046

Soil mass fraction 0.109

Seasalt mass fraction 0.059

Missing mass fraction 0.058

Denali National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.023551 0.034595 0.680765 0.496

ASULFATE 1.38806 0.062812 22.09855 0

ANO3 0.227215 0.357356 0.635823 0.525

OCM 1.051745 0.021788 48.2715 0

LAC -0.20621 0.371317 -0.55535 0.579

SOIL 0.854057 0.082481 10.35454 0

SEASALT 1.134389 0.098095 11.56424 0

Valid cases: 870 

R-Squared: 0.878

Death Valley Monument

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.7983 4.4485 19.7894 0.3293 32.0913 140

RECON 3.5235 3.811 14.5237 0.4789 28.1272 140

ASULFATE 0.7972 0.5769 0.3329 0.0743 2.5912 140

ANO3 0.2034 0.2044 0.0418 0.0231 1.4177 140

OCM 0.7341 0.6095 0.3714 -0.0563 3.2056 140

LAC 0.0793 0.0626 0.0039 0 0.3055 140

SOIL 1.6181 3.1105 9.6752 0.0561 22.4362 140

SEASALT 0.0914 0.1005 0.0101 0.0015 0.6876 140

Death Valley Monument

Sulfate mass fraction 0.21

Nitrate mass fraction 0.054

OC mass fraction 0.193

LAC mass fraction 0.021

Soil mass fraction 0.426

Seasalt mass fraction 0.024

Missing mass fraction 0.072

Death Valley Monument

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.1118 0.104358 -1.07126 0.286

ASULFATE 1.083778 0.160551 6.750344 0

ANO3 0.77015 0.306847 2.509888 0.013

OCM 0.841397 0.156851 5.364299 0

LAC 2.262968 1.526468 1.482486 0.141

Appendix 1

24
DRAFT

SOIL 1.207622 0.022986 52.5366 0

SEASALT 1.512772 0.565826 2.673565 0.008

Valid cases: 140 

R-Squared: 0.982

Dome Lands Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.6684 3.0889 9.541 0.3942 20.7383 133

RECON 4.0052 2.7871 7.7677 0.6986 15.7475 133

ASULFATE 0.8887 0.6861 0.4707 0.0795 3.2467 133

ANO3 0.6461 0.8609 0.7411 0.0046 5.4274 133

OCM 1.6674 1.4352 2.0599 0.3235 10.6848 133

LAC 0.1798 0.1151 0.0133 0.0248 0.7247 133

SOIL 0.5068 0.802 0.6432 0.0047 7.2949 133

SEASALT 0.1165 0.1689 0.0285 0.0002 1.1491 133

Dome Lands Wilderness

Sulfate mass fraction 0.242

Nitrate mass fraction 0.176

OC mass fraction 0.455

LAC mass fraction 0.049

Soil mass fraction 0.138

Seasalt mass fraction 0.032

Missing mass fraction -0.092

Dome Lands Wilderness

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.39656 0.09408 -4.21518 0

ASULFATE 1.064191 0.102733 10.3588 0

ANO3 0.71308 0.056642 12.58914 0

OCM 0.889121 0.07384 12.0412 0

LAC 1.656986 1.006249 1.646696 0.102

SOIL 1.754184 0.066195 26.50039 0

SEASALT -0.09336 0.271761 -0.34355 0.732

Valid cases: 133 

R-Squared: 0.972

Dolly Sods /Otter Creek Wilderness 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 10.2778 7.2362 52.3624 0.0589 46.7751 462

RECON 10.246 6.4369 41.4333 0.5045 38.8923 462

ASULFATE 5.7798 5.0536 25.539 0.0278 33.5759 462

ANO3 0.6317 0.7114 0.5061 0.0075 5.6775 462

OCM 3.0423 1.9639 3.8569 0.315 18.7421 462

LAC 0.3737 0.2029 0.0412 0.0272 1.7947 462

SOIL 0.3749 0.4435 0.1967 0.0102 6.3834 462

SEASALT 0.0436 0.0808 0.0065 0.0002 1.1612 462

Dolly Sods /Otter Creek Wilderness 

Sulfate mass fraction 0.562

Nitrate mass fraction 0.061

OC mass fraction 0.296

Appendix 1

25
DRAFT

LAC mass fraction 0.036

Soil mass fraction 0.036

Seasalt mass fraction 0.004

Missing mass fraction 0.003

Dolly Sods /Otter Creek Wilderness 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.15981 0.163445 -0.97777 0.329

ASULFATE 1.162311 0.016726 69.49263 0

ANO3 0.162265 0.114832 1.413059 0.158

OCM 0.878305 0.0573 15.32832 0

LAC 1.648897 0.560493 2.941872 0.003

SOIL 0.998349 0.172391 5.791186 0

SEASALT -1.03793 0.879794 -1.17974 0.239

Valid cases: 462 

R-Squared: 0.956

El Dorado Springs

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.6884 4.2286 17.8807 2.334 16.6667 33

RECON 8.7736 4.4053 19.407 2.5899 18.3975 33

ASULFATE 2.3429 1.7774 3.1591 0.5176 7.227 33

ANO3 2.7783 2.5745 6.6281 0.1754 9.0041 33

OCM 2.7068 1.5099 2.2797 1.0917 6.4517 33

LAC 0.3277 0.1389 0.0193 0.1389 0.6505 33

SOIL 0.5285 0.2999 0.0899 0.1712 1.3319 33

SEASALT 0.0893 0.0686 0.0047 0.0032 0.3255 33

El Dorado Springs

Sulfate mass fraction 0.305

Nitrate mass fraction 0.361

OC mass fraction 0.352

LAC mass fraction 0.043

Soil mass fraction 0.069

Seasalt mass fraction 0.012

Missing mass fraction -0.141

El Dorado Springs

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.74063 0.411316 -1.80065 0.083

ASULFATE 1.005854 0.084903 11.84705 0

ANO3 0.971415 0.064537 15.05202 0

OCM 0.607689 0.163361 3.719909 0.001

LAC 1.922293 1.824116 1.053822 0.302

SOIL 1.757382 0.52521 3.346058 0.003

SEASALT 1.901577 2.191773 0.867598 0.394

Valid cases: 33 RSquared: 0.978

Ellis

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 6.044 4.4537 19.8358 0.9629 19.4444 45

Appendix 1

26
DRAFT

RECON 6.3956 4.1743 17.425 1.3201 18.3737 45

ASULFATE 2.0382 1.5608 2.4361 0.2514 8.1572 45

ANO3 1.6811 2.6662 7.1086 0.085 11.7682 45

OCM 1.7366 1.0996 1.2092 0.1058 5.4148 45

LAC 0.1959 0.0983 0.0097 0.0186 0.4142 45

SOIL 0.6056 0.7107 0.5051 0.0547 3.7417 45

SEASALT 0.1381 0.3041 0.0925 0.0012 2.0554 45

Ellis

Sulfate mass fraction 0.337

Nitrate mass fraction 0.278

OC mass fraction 0.287

LAC mass fraction 0.032

Soil mass fraction 0.1

Seasalt mass fraction 0.023

Missing mass fraction -0.058

Ellis

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.68459 0.218186 -3.13764 0.003

ASULFATE 0.868511 0.087043 9.977946 0

ANO3 1.150819 0.044268 25.99682 0

OCM 1.183308 0.130803 9.046478 0

LAC -0.39437 1.798457 -0.21928 0.828

SOIL 1.852584 0.174665 10.6065 0

SEASALT -0.54992 0.377458 -1.45689 0.153

Valid cases: 45 RSquared: 0.984

Everglades National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 6.9867 4.0752 16.6075 1.9176 50.7283 342

RECON 7.9258 15.8563 251.4223 1.6203 292.9054 342

ASULFATE 2.6662 1.7458 3.0479 0.3848 11.0678 342

ANO3 0.5254 0.262 0.0686 0.029 2.0116 342

OCM 2.8282 15.3837 236.657 0.3143 284.2187 342

LAC 0.2808 0.4964 0.2465 -0.0167 6.643 342

SOIL 0.8887 1.7057 2.9095 0.031 17.1736 342

SEASALT 0.7366 0.7253 0.5261 0.005 3.7081 342

Everglades National Park

Sulfate mass fraction 0.382

Nitrate mass fraction 0.075

OC mass fraction 0.405

LAC mass fraction 0.04

Soil mass fraction 0.127

Seasalt mass fraction 0.105

Missing mass fraction -0.134

Everglades National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 1.502143 0.17241 8.712615 0

Appendix 1

27
DRAFT

ASULFATE 0.93201 0.041796 22.29904 0

ANO3 0.393137 0.290802 1.351906 0.177

OCM 0.07537 0.006772 11.12996 0

LAC 4.175359 0.221613 18.84079 0

SOIL 1.179427 0.039 30.24181 0

SEASALT 0.487894 0.091554 5.32905 0

Valid cases: 342 

R-Squared: 0.915

Flathead

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.639 6.9174 47.8498 -0.0558 35.3359 74

RECON 5.2456 7.5977 57.7247 0.2797 38.4214 74

ASULFATE 0.4882 0.3546 0.1258 0.0514 1.7653 74

ANO3 0.2144 0.2157 0.0465 0.0115 1.2744 74

OCM 3.9059 6.8454 46.8597 -0.0157 34.565 74

LAC 0.2256 0.3163 0.1 0 1.7974 74

SOIL 0.3037 0.353 0.1246 0.0027 1.8297 74

SEASALT 0.1078 0.1998 0.0399 0.0028 1.3743 74

Flathead

Sulfate mass fraction 0.105

Nitrate mass fraction 0.046

OC mass fraction 0.842

LAC mass fraction 0.049

Soil mass fraction 0.065

Seasalt mass fraction 0.023

Missing mass fraction -0.131

Flathead

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.02487 0.091386 -0.27215 0.786

ASULFATE 1.33012 0.209768 6.340905 0

ANO3 0.115713 0.232631 0.49741 0.621

OCM 0.966856 0.015187 63.66327 0

LAC -0.81601 0.326123 -2.50216 0.015

SOIL 1.233433 0.18871 6.536129 0

SEASALT 0.211385 0.229988 0.919115 0.361

Valid cases: 74 RSquared: 0.997

Fort Peck

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.5717 2.7559 7.5947 1.0522 12.4254 63

RECON 3.9085 2.6973 7.2757 1.1583 12.8652 63

ASULFATE 0.9734 0.6454 0.4166 0.2351 3.5202 63

ANO3 0.4308 0.4979 0.2479 -0.0188 1.9243 63

OCM 1.7781 1.937 3.7518 0.3496 9.0974 63

LAC 0.1344 0.1272 0.0162 0.025 0.6104 63

SOIL 0.4898 0.4598 0.2114 0.0847 2.0611 63

SEASALT 0.102 0.0984 0.0097 0.0003 0.5783 63

Appendix 1

28
DRAFT

Fort Peck

Sulfate mass fraction 0.273

Nitrate mass fraction 0.121

OC mass fraction 0.498

LAC mass fraction 0.038

Soil mass fraction 0.137

Seasalt mass fraction 0.029

Missing mass fraction -0.094

Fort Peck

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.21513 0.144951 -1.48412 0.143

ASULFATE 1.154034 0.127896 9.023195 0

ANO3 0.560115 0.141486 3.958804 0

OCM 0.983643 0.118274 8.316654 0

LAC -0.29061 1.835932 -0.15829 0.875

SOIL 1.394732 0.201334 6.92744 0

SEASALT 0.286067 0.691727 0.413554 0.681

Valid cases: 63 RSquared: 0.972

Gates of the Mountains 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 1.7418 1.7586 3.0926 0.0305 11.0104 111

RECON 1.9262 1.9139 3.6632 0.144 12.2108 111

ASULFATE 0.4105 0.2662 0.0709 0.0006 1.3925 111

ANO3 0.1618 0.1403 0.0197 0.0009 0.8181 111

OCM 0.9186 1.4288 2.0416 -0.1535 9.8635 111

LAC 0.0724 0.08 0.0064 -0.003 0.4348 111

SOIL 0.2833 0.4313 0.186 0.0034 3.0276 111

SEASALT 0.0795 0.0905 0.0082 0.0013 0.6954 111

Gates of the Mountains 

Sulfate mass fraction 0.236

Nitrate mass fraction 0.093

OC mass fraction 0.527

LAC mass fraction 0.042

Soil mass fraction 0.163

Seasalt mass fraction 0.046

Missing mass fraction -0.106

Gates of the Mountains 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.049811 0.050232 0.991609 0.324

ASULFATE 1.221834 0.149761 8.158555 0

ANO3 0.113402 0.216722 0.523261 0.602

OCM 0.89667 0.04832 18.5568 0

LAC 0.062662 0.945796 0.066253 0.947

SOIL 1.241074 0.073705 16.83835 0

SEASALT -0.09909 0.293482 -0.33762 0.736

Appendix 1

29
DRAFT

Valid cases: 111 

R-Squared: 0.979

Gila Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.9701 2.9256 8.5592 0.4662 27.3362 484

RECON 3.9054 3.117 9.7155 0.5034 30.7931 484

ASULFATE 1.153 0.7157 0.5122 0.0868 4.5335 484

ANO3 0.1448 0.1144 0.0131 0.0054 0.7378 484

OCM 1.6352 2.4096 5.8063 0.0056 26.2638 484

LAC 0.175 0.2339 0.0547 0.0016 3.0253 484

SOIL 0.7436 0.797 0.6352 0.0078 6.1044 484

SEASALT 0.0538 0.1022 0.0105 0.0002 1.3224 484

Gila Wilderness

Sulfate mass fraction 0.29

Nitrate mass fraction 0.036

OC mass fraction 0.412

LAC mass fraction 0.044

Soil mass fraction 0.187

Seasalt mass fraction 0.014

Missing mass fraction 0.016

Gila Wilderness

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.00962 0.060863 -0.15804 0.874

ASULFATE 1.215344 0.039633 30.66489 0

ANO3 1.789674 0.332108 5.388829 0

OCM 0.856865 0.040288 21.26826 0

LAC 0.596826 0.416284 1.433701 0.152

SOIL 1.087022 0.045917 23.67349 0

SEASALT 0.101518 0.281463 0.360681 0.718

Valid cases: 484 

R-Squared: 0.958

Glacier National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.565 4.185 17.5141 0.463 51.1405 915

RECON 5.7241 4.365 19.0533 0.4424 63.1302 915

ASULFATE 0.9173 0.5932 0.3519 0.0655 3.8407 915

ANO3 0.3179 0.4389 0.1926 -0.0057 4.2499 915

OCM 3.4478 3.3462 11.1973 0.2065 54.6601 915

LAC 0.3984 0.2979 0.0888 0.0032 2.7822 915

SOIL 0.5914 0.8956 0.8021 0.0108 14.8048 915

SEASALT 0.0513 0.094 0.0088 0.0002 1.2671 915

Glacier National Park

Sulfate mass fraction 0.165

Nitrate mass fraction 0.057

OC mass fraction 0.62

LAC mass fraction 0.072

Soil mass fraction 0.106

Appendix 1

30
DRAFT

Seasalt mass fraction 0.009

Missing mass fraction -0.029

Glacier National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.02118 0.058804 -0.3602 0.719

ASULFATE 1.156531 0.05016 23.05689 0

ANO3 0.933968 0.0742 12.58723 0

OCM 0.877465 0.014785 59.34755 +DEN

LAC 1.431444 0.161026 8.889547 0

SOIL 1.173062 0.031488 37.25425 0

SEASALT -1.1885 0.29928 -3.97121 0

Valid cases: 915 RSquared: 0.965

Great Basin National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.8313 2.0603 4.245 0.031 19.1051 644

RECON 2.8217 1.754 3.0767 0.4069 16.0765 644

ASULFATE 0.6175 0.4303 0.1852 0.0669 2.2641 644

ANO3 0.1598 0.1718 0.0295 -0.0266 1.5854 644

OCM 1.2254 1.006 1.0121 0.0907 11.3472 644

LAC 0.1539 0.1324 0.0175 -0.0158 1.1994 644

SOIL 0.6148 0.8368 0.7002 0.004 10.3488 644

SEASALT 0.0503 0.0958 0.0092 0.0002 1.1706 644

Great Basin National Park

Sulfate mass fraction 0.218

Nitrate mass fraction 0.056

OC mass fraction 0.433

LAC mass fraction 0.054

Soil mass fraction 0.217

Seasalt mass fraction 0.018

Missing mass fraction 0.003

Great Basin National Park

CONSTANT -0.18084 0.054889 -3.29463 0.001

ASULFATE 1.454571 0.069135 21.03947 0

ANO3 0.583467 0.171512 3.401896 0.001

OCM 0.943152 0.035566 26.51838 0

LAC 0.137452 0.266978 0.514843 0.607

SOIL 1.345474 0.034795 38.66835 0

SEASALT 0.331886 0.278203 1.192962 0.233

Valid cases: 644 RSquared: 0.901

Hance Camp at Grand Canyon National Park 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.8928 2.5088 6.294 -0.1229 20.2842 246

RECON 2.9893 2.7237 7.4184 0.2937 27.1379 246

ASULFATE 0.7102 0.4506 0.203 0.0519 2.4601 246

ANO3 0.1853 0.1711 0.0293 -0.0146 1.0169 246

Appendix 1

31
DRAFT

OCM 1.2808 2.0202 4.0814 -0.0506 24.6078 246

LAC 0.1091 0.1327 0.0176 0 1.4106 246

SOIL 0.6429 0.8457 0.7153 0.0112 7.5094 246

SEASALT 0.061 0.1119 0.0125 0.0002 1.5476 246

Hance Camp at Grand Canyon National Park 

Sulfate mass fraction 0.245

Nitrate mass fraction 0.064

OC mass fraction 0.443

LAC mass fraction 0.038

Soil mass fraction 0.222

Seasalt mass fraction 0.021

Missing mass fraction -0.033

Hance Camp at Grand Canyon National Park 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.07999 0.088739 -0.90144 0.368

ASULFATE 1.287632 0.125027 10.29882 0

ANO3 0.409637 0.283657 1.444127 0.15

OCM 0.488048 0.053216 9.171064 0

LAC 4.660393 0.822087 5.668975 0

SOIL 1.273328 0.065711 19.37782 0

SEASALT 0.493568 0.393364 1.254736 0.211

Valid cases: 246 

R-Squared: 0.927

Great Gulf Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.9243 4.4472 19.7773 0.1235 27.8765 254

RECON 4.7373 3.6497 13.32 0.2358 23.1865 254

ASULFATE 2.012 2.0366 4.1478 0.001 12.6328 254

ANO3 0.2116 0.273 0.0745 -0.0017 2.172 254

OCM 2.0284 1.8667 3.4845 0.1026 13.4125 254

LAC 0.2049 0.1362 0.0185 0 0.7872 254

SOIL 0.2036 0.2386 0.0569 0.0035 1.9112 254

SEASALT 0.0768 0.0884 0.0078 0.0003 0.4417 254

Great Gulf Wilderness

Sulfate mass fraction 0.409

Nitrate mass fraction 0.043

OC mass fraction 0.412

LAC mass fraction 0.042

Soil mass fraction 0.041

Seasalt mass fraction 0.016

Missing mass fraction 0.038

Great Gulf Wilderness

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.43233 0.142963 -3.02403 0.003

ASULFATE 1.187273 0.046498 25.53408 0

ANO3 -0.07905 0.251663 -0.31409 0.754

OCM 1.015928 0.052973 19.17835 0

Appendix 1

32
DRAFT

LAC 3.439409 0.862639 3.987078 0

SOIL 1.36471 0.312699 4.3643 0

SEASALT -0.76519 0.755477 -1.01285 0.312

Valid cases: 254 

R-Squared: 0.947

Great River Bluffs

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.6622 5.3324 28.4344 2.0801 22.0872 62

RECON 8.3856 5.5332 30.6164 2.2447 23.4772 62

ASULFATE 2.3541 1.809 3.2724 0.3546 8.2477 62

ANO3 3.3073 3.6051 12.9967 0.1222 15.0529 62

OCM 1.8968 1.0077 1.0154 0.5283 5.3644 62

LAC 0.2645 0.1305 0.017 0.0379 0.6084 62

SOIL 0.3985 0.2965 0.0879 0.0457 1.873 62

SEASALT 0.1642 0.2066 0.0427 0.007 1.2701 62

Great River Bluffs

Sulfate mass fraction 0.307

Nitrate mass fraction 0.432

OC mass fraction 0.248

LAC mass fraction 0.035

Soil mass fraction 0.052

Seasalt mass fraction 0.021

Missing mass fraction -0.094

Great River Bluffs

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.42119 0.226482 -1.85972 0.068

ASULFATE 1.140393 0.067535 16.88591 0

ANO3 0.875718 0.036657 23.88962 0

OCM 0.093787 0.22383 0.419008 0.677

LAC 5.137514 1.631147 3.149634 0.003

SOIL 1.900566 0.433588 4.383345 0

SEASALT 1.266813 0.460513 2.750874 0.008

Valid cases: 62 RSquared: 0.983

Great Sand Dunes National Monument 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.4861 2.3816 5.6718 0.032 29.5 783

RECON 3.3326 2.0317 4.1279 0.7784 28.3587 783

ASULFATE 0.8297 0.4824 0.2328 0.1159 3.5642 783

ANO3 0.1608 0.1652 0.0273 -0.0427 2.5016 783

OCM 1.1927 0.9255 0.8566 -0.1381 19.6915 783

LAC 0.1121 0.0726 0.0053 -0.0234 0.8088 783

SOIL 0.9938 1.3509 1.8248 0.0375 18.9959 783

SEASALT 0.0435 0.0765 0.0058 0.0002 1.3873 783

Great Sand Dunes National Monument 

Sulfate mass fraction 0.238

Nitrate mass fraction 0.046

Appendix 1

33
DRAFT

OC mass fraction 0.342

LAC mass fraction 0.032

Soil mass fraction 0.285

Seasalt mass fraction 0.012

Missing mass fraction 0.044

Great Sand Dunes National Monument 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.13479 0.06421 -2.09912 0.036

ASULFATE 1.34001 0.059567 22.49566 0

ANO3 0.4085 0.185597 2.201004 0.028

OCM 1.097791 0.040785 26.91631 0

LAC -0.15481 0.498447 -0.31059 0.756

SOIL 1.158545 0.020837 55.60156 0

SEASALT 0.000091 0.350063 0.00026 1

Valid cases: 783 

R-Squared: 0.902

Great Smoky Mountains National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 12.3525 8.0746 65.1995 0.4748 45.109 669

RECON 11.7269 6.9243 47.9458 0.6578 39.7646 669

ASULFATE 6.631 5.0142 25.1423 0.149 26.7189 669

ANO3 0.4711 0.4963 0.2463 0.0462 5.9842 669

OCM 3.5677 2.1591 4.6619 0.275 17.6301 669

LAC 0.4417 0.2341 0.0548 0.02 1.8311 669

SOIL 0.5559 1.0633 1.1305 0.0101 19.1154 669

SEASALT 0.0596 0.1121 0.0126 0.0002 1.6402 669

Great Smoky Mountains National Park

Sulfate mass fraction 0.537

Nitrate mass fraction 0.038

OC mass fraction 0.289

LAC mass fraction 0.036

Soil mass fraction 0.045

Seasalt mass fraction 0.005

Missing mass fraction 0.051

Great Smoky Mountains National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.23103 0.147756 -1.56357 0.118

ASULFATE 1.225842 0.015707 78.04398 0

ANO3 0.348753 0.132826 2.625649 0.009

OCM 0.947677 0.046604 20.33467 0

LAC 0.815435 0.382794 2.130216 0.034

SOIL 1.021134 0.05804 17.59374 0

SEASALT -0.30441 0.539365 -0.56439 0.573

Valid cases: 669 RSquared: 0.964

Guadalupe Mountains National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

Appendix 1

34
DRAFT

FM 5.7756 3.9198 15.3649 0.1673 57.3403 774

RECON 5.3318 3.7619 14.1519 0.1312 52.9482 774

ASULFATE 1.7231 1.1223 1.2595 0.0204 7.7759 774

ANO3 0.2592 0.2314 0.0536 -0.0458 2.5328 774

OCM 1.3383 0.8593 0.7383 -0.2387 11.4055 774

LAC 0.138 0.083 0.0069 -0.0378 0.6451 774

SOIL 1.8165 3.1233 9.7551 0.0365 47.28 774

SEASALT 0.0568 0.0722 0.0052 0.0002 0.4374 774

Guadalupe Mountains National Park

Sulfate mass fraction 0.298

Nitrate mass fraction 0.045

OC mass fraction 0.232

LAC mass fraction 0.024

Soil mass fraction 0.315

Seasalt mass fraction 0.01

Missing mass fraction 0.077

Guadalupe Mountains National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.426738 0.088064 4.845792 0

ASULFATE 1.135743 0.035295 32.17895 0

ANO3 0.182672 0.156381 1.168123 0.243

OCM 0.919829 0.056374 16.31659 0

LAC 1.1411 0.549312 2.077328 0.038

SOIL 1.015542 0.012881 78.84277 0

SEASALT 1.960963 0.509758 3.846848 0

Valid cases: 774 

R-Squared: 0.939

Haleakala National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.2796 1.1506 1.3239 0.3655 6.7524 227

RECON 2.2257 1.1445 1.3099 0.3692 7.5976 227

ASULFATE 0.7747 0.459 0.2107 0.0468 2.8723 227

ANO3 0.2586 0.172 0.0296 -0.0204 0.8625 227

OCM 0.5739 0.5348 0.286 -0.0985 4.4174 227

LAC 0.0704 0.0615 0.0038 -0.0147 0.3242 227

SOIL 0.2236 0.2548 0.0649 0.0057 1.9153 227

SEASALT 0.3245 0.2783 0.0774 0.0018 1.7282 227

Haleakala National Park

Sulfate mass fraction 0.34

Nitrate mass fraction 0.113

OC mass fraction 0.252

LAC mass fraction 0.031

Soil mass fraction 0.098

Seasalt mass fraction 0.142

Missing mass fraction 0.024

Haleakala National Park

Variable Estimate Std Error t-value Prob>|t|

Appendix 1

35
DRAFT

CONSTANT 0.094167 0.048588 1.938064 0.054

ASULFATE 0.99611 0.070766 14.07607 0

ANO3 1.597491 0.192387 8.303523 0

OCM 0.821521 0.051962 15.81001 0

LAC -0.34503 0.511189 -0.67495 0.5

SOIL 1.120723 0.085946 13.03986 0

SEASALT 0.933718 0.074832 12.47746 0

Valid cases: 227 

R-Squared: 0.930

Hawaii Volcanoes National Park 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.1902 3.6676 13.451 0.248 25.8642 545

RECON 2.5489 2.3645 5.5909 0.0766 14.1954 545

ASULFATE 1.5157 2.1047 4.4298 0.0008 12.1611 545

ANO3 0.0933 0.0728 0.0053 -0.0431 0.4838 545

OCM 0.3866 0.3766 0.1418 -0.2902 2.8033 545

LAC 0.0603 0.0723 0.0052 -0.0501 0.6265 545

SOIL 0.1286 0.1871 0.035 0.0006 2.5696 545

SEASALT 0.3644 0.2931 0.0859 0.0008 2.1517 545

Hawaii Volcanoes National Park 

Sulfate mass fraction 0.475

Nitrate mass fraction 0.029

OC mass fraction 0.121

LAC mass fraction 0.019

Soil mass fraction 0.04

Seasalt mass fraction 0.114

Missing mass fraction 0.201

Hawaii Volcanoes National Park 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.22558 0.097242 2.319774 0.021

ASULFATE 1.606402 0.028675 56.02102 0

ANO3 1.413923 0.764124 1.850383 0.065

OCM 0.237355 0.133396 1.779331 0.076

LAC 0.640016 0.825858 0.774971 0.439

SOIL 1.150588 0.272587 4.221 0

SEASALT 0.328115 0.173647 1.889544 0.059

Valid cases: 545 

R-Squared: 0.914

Hells Canyon

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.1237 2.676 7.1611 0.1854 14.3056 125

RECON 3.4332 2.7155 7.374 0.5264 16.4732 125

ASULFATE 0.5586 0.3252 0.1058 0.0519 1.5013 125

ANO3 0.28 0.6255 0.3913 -0.0364 6.3957 125

OCM 1.7451 1.9952 3.9809 0.139 14.5688 125

LAC 0.1483 0.1192 0.0142 0.0063 0.7223 125

SOIL 0.6193 1.0439 1.0898 0.0076 8.8542 125

Appendix 1

36
DRAFT

SEASALT 0.0818 0.1133 0.0128 0.0023 0.8227

Hells Canyon

Sulfate mass fraction 0.179

Nitrate mass fraction 0.09

OC mass fraction 0.559

LAC mass fraction 0.047

Soil mass fraction 0.198

Seasalt mass fraction 0.026

Missing mass fraction -0.099

Hells Canyon

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.13512 0.088226 -1.53147 0.128

ASULFATE 1.005987 0.138548 7.260914 0

ANO3 0.686883 0.064764 10.60587 0

OCM 0.842983 0.041706 20.21242 0

LAC 1.635589 0.7125 2.295562 0.023

SOIL 1.289339 0.040623 31.73886 0

SEASALT -0.09425 0.332815 -0.28319 0.778

Valid cases: 125 RSquared: 0.978

Hercules-Glade

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.0664 4.5107 20.3468 2.1552 17.8197 35

RECON 7.673 4.5343 20.5597 2.1454 19.7665 35

ASULFATE 2.8403 2.5855 6.685 0.3385 12.5775 35

ANO3 1.181 1.4314 2.0489 0.1058 6.0584 35

OCM 2.7302 1.7228 2.968 0.9706 7.2482 35

LAC 0.292 0.1577 0.0249 0.1111 0.8206 35

SOIL 0.5284 0.5805 0.337 0.0235 3.3544 35

SEASALT 0.1012 0.0931 0.0087 0.0017 0.3929 35

Hercules-Glade

Sulfate mass fraction 0.402

Nitrate mass fraction 0.167

OC mass fraction 0.386

LAC mass fraction 0.041

Soil mass fraction 0.075

Seasalt mass fraction 0.014

Missing mass fraction -0.086

Hercules-Glade

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.34287 0.208297 -1.64608 0.111

ASULFATE 0.94734 0.035589 26.61905 0

ANO3 0.748503 0.056956 13.14179 0

OCM 0.88694 0.081517 10.88046 0

LAC 1.364316 0.953108 1.431438 0.163

SOIL 2.032879 0.146419 13.88401 0

SEASALT -0.58724 0.843176 -0.69646 0.49

Appendix 1

37
DRAFT

Valid cases: 35 RSquared: 0.992

Hillside

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.3309 4.0168 16.1344 0.384 28.7309 121

RECON 3.8877 3.1818 10.1239 0.5934 25.0409 121

ASULFATE 1.0227 0.7079 0.5012 0.1372 3.8893 121

ANO3 0.3196 0.2768 0.0766 0.0277 1.5256 121

OCM 1.0677 1.2246 1.4997 -0.1085 11.7076 121

LAC 0.0985 0.0726 0.0053 0 0.5983 121

SOIL 1.2833 1.5631 2.4434 0.0397 9.932 121

SEASALT 0.0959 0.097 0.0094 0.0017 0.4575 121

Hillside

Sulfate mass fraction 0.236

Nitrate mass fraction 0.074

OC mass fraction 0.247

LAC mass fraction 0.023

Soil mass fraction 0.296

Seasalt mass fraction 0.022

Missing mass fraction 0.102

Hillside

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.37668 0.133731 -2.81669 0.006

ASULFATE 1.364285 0.09528 14.31875 0

ANO3 0.495062 0.258961 1.911727 0.058

OCM 1.131202 0.132958 8.507977 0

LAC 0.003115 1.713456 0.001818 0.999

SOIL 1.42324 0.068048 20.91537 0

SEASALT 1.246729 0.655493 1.901972 0.06

Valid cases: 121 

R-Squared: 0.977

Hoover

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.6349 6.0032 36.039 0.3086 45.7595 96

RECON 3.6174 6.913 47.7895 0.3062 60.0337 96

ASULFATE 0.483 0.3575 0.1278 0.0627 1.3522 96

ANO3 0.1647 0.2663 0.0709 0.0074 2.5297 96

OCM 1.7082 5.2095 27.1387 -0.0171 49.5869 96

LAC 0.1563 0.574 0.3295 0.0031 5.6504 96

SOIL 1.0104 2.6729 7.1442 0.0054 24.9512 96

SEASALT 0.0948 0.1354 0.0183 0.0013 1.1499 96

Hoover

Sulfate mass fraction 0.133

Nitrate mass fraction 0.045

OC mass fraction 0.47

LAC mass fraction 0.043

Soil mass fraction 0.278

Appendix 1

38
DRAFT

Seasalt mass fraction 0.026

Missing mass fraction 0.005

Hoover

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.03126 0.088624 -0.35269 0.725

ASULFATE 1.786255 0.180053 9.920699 0

ANO3 -0.92305 0.590722 -1.56257 0.122

OCM 1.085997 0.053577 20.26992 0

LAC -3.73637 0.568374 -6.57378 0

SOIL 1.570579 0.033946 46.26761 0

SEASALT 1.026713 0.69711 1.472812 0.144

Valid cases: 96 RSquared: 0.994

Ike's Backbone

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.7792 5.1597 26.6222 0.8188 44.7438 124

RECON 4.3398 3.3956 11.5302 1.0065 24.4583 124

ASULFATE 1.015 0.5847 0.3419 0.1736 3.3487 124

ANO3 0.2923 0.2273 0.0516 0.0372 1.5167 124

OCM 1.3101 1.4261 2.0337 0.2192 14.148 124

LAC 0.1334 0.089 0.0079 0.0031 0.654 124

SOIL 1.5037 2.1057 4.4338 0.067 17.0965 124

SEASALT 0.0853 0.1403 0.0197 0.0003 1.3464 124

Ike's Backbone

Sulfate mass fraction 0.212

Nitrate mass fraction 0.061

OC mass fraction 0.274

LAC mass fraction 0.028

Soil mass fraction 0.315

Seasalt mass fraction 0.018

Missing mass fraction 0.092

Ike's Backbone

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.76859 0.277002 -2.77467 0.006

ASULFATE 1.076273 0.211557 5.087379 0

ANO3 0.572832 0.701981 0.816022 0.416

OCM 0.857881 0.137914 6.220405 0

LAC 1.63413 1.868725 0.874463 0.384

SOIL 1.947305 0.062678 31.06834 0

SEASALT 0.208873 0.760604 0.274615 0.784

Valid cases: 124 RSquared: 0.954

Indian Gardens

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.3892 2.8921 8.3645 0.4546 27.9791 608

RECON 4.2737 2.9122 8.4806 0.0486 36.7862 608

ASULFATE 1.0653 0.667 0.4449 0.0019 5.598 608

Appendix 1

39
DRAFT

ANO3 0.2083 0.1856 0.0344 -0.0201 2.1073 608

OCM 1.6355 1.9666 3.8674 -0.0995 31.6867 608

LAC 0.1749 0.1332 0.0177 -0.0132 1.6799 608

SOIL 1.1361 1.1355 1.2893 0.0048 9.4677 608

SEASALT 0.0536 0.0726 0.0053 0.0002 0.4099 608

Indian Gardens

Sulfate mass fraction 0.243

Nitrate mass fraction 0.047

OC mass fraction 0.373

LAC mass fraction 0.04

Soil mass fraction 0.259

Seasalt mass fraction 0.012

Missing mass fraction 0.026

Indian Gardens

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.20347 0.090274 2.253917 0.025

ASULFATE 1.119422 0.062778 17.83137 0

ANO3 0.594438 0.236587 2.512557 0.012

OCM 0.758329 0.034791 21.79655 0

LAC 0.981145 0.513088 1.912233 0.056

SOIL 1.268732 0.0385 32.95393 0

SEASALT 0.302136 0.549363 0.549975 0.583

Valid cases: 608 RSquared: 0.894

Isle Royale National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.1348 2.858 8.1679 0.3356 19.858 162

RECON 3.2443 2.9544 8.7287 0.3308 22.6742 162

ASULFATE 1.216 0.8856 0.7843 0.1064 6.1993 162

ANO3 0.6458 1.5778 2.4893 0.016 13.1936 162

OCM 0.9685 0.9661 0.9333 -0.1548 6.6434 162

LAC 0.1165 0.1073 0.0115 0 0.6173 162

SOIL 0.1648 0.1457 0.0212 0.0129 1.0656 162

SEASALT 0.1328 0.2669 0.0712 0.0012 2.1612 162

Isle Royale National Park

Sulfate mass fraction 0.388

Nitrate mass fraction 0.206

OC mass fraction 0.309

LAC mass fraction 0.037

Soil mass fraction 0.053

Seasalt mass fraction 0.042

Missing mass fraction -0.035

Isle Royale National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.03955 0.075842 -0.52142 0.603

ASULFATE 0.999097 0.070453 14.18106 0

ANO3 0.81947 0.036182 22.64875 0

Appendix 1

40
DRAFT

OCM 0.927082 0.092658 10.00537 0

LAC 2.680185 1.157074 2.316347 0.022

SOIL 0.925769 0.356186 2.59912 0.01

SEASALT 0.509238 0.147235 3.458667 0.001

Valid cases: 162 

R-Squared: 0.971

Jarbidge Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.1213 2.6839 7.2033 0.0309 21.9968 749

RECON 2.9437 2.4477 5.9913 0.1428 19.9624 749

ASULFATE 0.5202 0.3464 0.12 0.0003 2.3472 749

ANO3 0.1352 0.2419 0.0585 -0.0179 5.1784 749

OCM 1.2292 1.3485 1.8184 -0.3019 13.3612 749

LAC 0.0924 0.1042 0.0109 -0.0189 1.0889 749

SOIL 0.9166 1.1355 1.2894 0 11.3332 749

SEASALT 0.0502 0.108 0.0117 0.0002 1.4025 749

Jarbidge Wilderness

Sulfate mass fraction 0.167

Nitrate mass fraction 0.043

OC mass fraction 0.394

LAC mass fraction 0.03

Soil mass fraction 0.294

Seasalt mass fraction 0.016

Missing mass fraction 0.057

Jarbidge Wilderness

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.015391 0.048263 0.31889 0.75

ASULFATE 1.225684 0.091422 13.40683 0

ANO3 0.991338 0.114106 8.687866 0

OCM 0.82675 0.041615 19.86641 0

LAC 1.416221 0.517574 2.736268 0.006

SOIL 1.289471 0.026545 48.57722 0

SEASALT 0.107596 0.238389 0.451348 0.652

Valid cases: 749 

R-Squared: 0.933

James River Face

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 8.1972 4.8474 23.4973 0.5712 23.4337 39

RECON 8.7415 4.2671 18.2078 0.7236 18.8666 39

ASULFATE 3.765 2.6236 6.8835 0.1219 12.9162 39

ANO3 0.8441 0.7272 0.5288 0.0299 3.1709 39

OCM 3.2129 1.8764 3.5209 0.3562 7.4506 39

LAC 0.4616 0.2348 0.0551 0.0845 0.9665 39

SOIL 0.3445 0.1812 0.0329 0.023 0.7216 39

SEASALT 0.1134 0.1722 0.0297 0.0035 0.7629 39

James River Face

Sulfate mass fraction 0.459

Appendix 1

41
DRAFT

Nitrate mass fraction 0.103

OC mass fraction 0.392

LAC mass fraction 0.056

Soil mass fraction 0.042

Seasalt mass fraction 0.014

Missing mass fraction -0.066

James River Face

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -1.00115 0.454926 -2.20068 0.035

ASULFATE 1.399945 0.107612 13.00923 0

ANO3 0.310779 0.295879 1.050356 0.301

OCM 0.967895 0.153143 6.32019 0

LAC 0.658019 1.306686 0.503579 0.618

SOIL 0.51377 1.605504 0.320005 0.751

SEASALT 0.659334 1.338113 0.492735 0.626

Valid cases: 39 RSquared: 0.953

Joshua Tree

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.9118 3.5906 12.8924 0.5089 20.4403 108

RECON 4.3509 3.949 15.5948 0.7979 26.223 108

ASULFATE 0.8071 0.6226 0.3877 0.1084 2.8864 108

ANO3 1.1983 2.0306 4.1234 0.0488 15.1643 108

OCM 1.2123 1.2215 1.4921 0.1231 7.1969 108

LAC 0.1612 0.1091 0.0119 0.0062 0.5818 108

SOIL 0.8534 2.3711 5.622 0.0246 22.668 108

SEASALT 0.1187 0.1393 0.0194 0.0002 1.0184 108

Joshua Tree

Sulfate mass fraction 0.206

Nitrate mass fraction 0.306

OC mass fraction 0.31

LAC mass fraction 0.041

Soil mass fraction 0.218

Seasalt mass fraction 0.03

Missing mass fraction -0.112

Joshua Tree

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.28839 0.137928 -2.09086 0.039

ASULFATE 1.407079 0.141735 9.927543 0

ANO3 0.74019 0.038936 19.01031 0

OCM 0.984804 0.086438 11.39325 0

LAC 1.923153 1.007563 1.908717 0.059

SOIL 0.799714 0.028996 27.58013 0

SEASALT -0.07332 0.479211 -0.15301 0.879

Valid cases: 108 RSquared: 0.967

Kaiser

Appendix 1

42
DRAFT

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.5941 2.8392 8.0612 -0.1235 17.837 137

RECON 2.8546 2.8333 8.0278 0.3421 18.0602 137

ASULFATE 0.5085 0.4366 0.1906 0.0489 1.7504 137

ANO3 0.3272 0.5597 0.3132 -0.0502 4.8201 137

OCM 1.3472 1.7709 3.1359 0.0135 13.9955 137

LAC 0.1273 0.1099 0.0121 0.0091 0.7598 137

SOIL 0.416 0.5447 0.2967 0.0016 4.4508 137

SEASALT 0.1284 0.2436 0.0593 0.0025 1.9048 137

Kaiser

Sulfate mass fraction 0.196

Nitrate mass fraction 0.126

OC mass fraction 0.519

LAC mass fraction 0.049

Soil mass fraction 0.16

Seasalt mass fraction 0.049

Missing mass fraction -0.1

Kaiser

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.10026 0.051818 -1.93493 0.055

ASULFATE 1.108409 0.086159 12.86473 0

ANO3 1.030695 0.060988 16.89986 0

OCM 1.005862 0.036183 27.79902 0

LAC -0.39244 0.57186 -0.68625 0.494

SOIL 1.27059 0.064742 19.62529 0

SEASALT -0.31342 0.119581 -2.62098 0.01

Valid cases: 137 

R-Squared: 0.987

Kalmiopsis

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.3281 3.6133 13.0558 0.3793 36.9048 319

RECON 5.0784 17.4685 305.1475 0.6404 213.324 319

ASULFATE 0.6151 0.4603 0.2119 0.0097 2.3742 319

ANO3 0.1971 0.2906 0.0844 -0.0488 3.2364 319

OCM 3.4877 15.7146 246.9501 0.1897 194.9553 319

LAC 0.2904 1.5613 2.4378 0 22.6124 319

SOIL 0.1982 0.3504 0.1228 0.0018 3.0534 319

SEASALT 0.2899 0.4038 0.163 0.0003 2.4498 319

Kalmiopsis

Sulfate mass fraction 0.185

Nitrate mass fraction 0.059

OC mass fraction 1.048

LAC mass fraction 0.087

Soil mass fraction 0.06

Seasalt mass fraction 0.087

Missing mass fraction -0.526

Appendix 1

43
DRAFT

Kalmiopsis

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.883846 0.141111 6.26348 0

ASULFATE 2.250337 0.276649 8.134258 0

ANO3 -0.48202 0.835827 -0.5767 0.565

OCM 0.194549 0.020275 9.59576 0

LAC 0.010278 0.129697 0.079247 0.937

SOIL 1.635936 0.246391 6.63958 0

SEASALT 0.515614 0.198425 2.598536 0.01

Valid cases: 319 RSquared: 0.850

Lava Beds

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.9607 3.523 12.4115 0.0589 25.2087 163

RECON 3.1675 3.5212 12.399 0.3036 25.2439 163

ASULFATE 0.5176 0.3646 0.1329 0.0223 1.951 163

ANO3 0.1456 0.1186 0.0141 -0.0222 1.1095 163

OCM 1.7908 2.8443 8.0899 0.0895 22.5054 163

LAC 0.1355 0.128 0.0164 0 0.7737 163

SOIL 0.4882 1.0074 1.0148 0.0015 11.1983 163

SEASALT 0.0899 0.131 0.0171 0.0003 1.245 163

Lava Beds

Sulfate mass fraction 0.175

Nitrate mass fraction 0.049

OC mass fraction 0.605

LAC mass fraction 0.046

Soil mass fraction 0.165

Seasalt mass fraction 0.03

Missing mass fraction -0.07

Lava Beds

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.13412 0.070345 -1.90659 0.058

ASULFATE 0.855197 0.121967 7.011703 0

ANO3 1.479476 0.400386 3.695127 0

OCM 0.955804 0.02775 34.444 0

LAC -0.29494 0.66239 -0.44526 0.657

SOIL 1.409909 0.047169 29.89034 0

SEASALT 0.854364 0.267702 3.191475 0.002

Valid cases: 163 RSquared: 0.986

Lake Sugema

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 9.7214 6.4987 42.2335 2.4844 30.1894 62

RECON 9.8028 6.1302 37.5798 2.5901 28.9819 62

ASULFATE 2.4458 1.5433 2.3819 0.5089 6.133 62

ANO3 4.5106 4.3943 19.3096 0.1202 19.3001 62

OCM 1.9964 1.1006 1.2113 0.6248 6.7561 62

LAC 0.2998 0.1615 0.0261 0.0677 0.7872 62

Appendix 1

44
DRAFT

SOIL 0.3802 0.1791 0.0321 0.0452 1.1513 62

SEASALT 0.17 0.2043 0.0417 0.0002 1.3584 62

Lake Sugema

Sulfate mass fraction 0.252

Nitrate mass fraction 0.464

OC mass fraction 0.205

LAC mass fraction 0.031

Soil mass fraction 0.039

Seasalt mass fraction 0.017

Missing mass fraction -0.008

Lake Sugema

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.29885 0.312387 -0.95666 0.343

ASULFATE 1.192446 0.097814 12.19099 0

ANO3 1.040713 0.037474 27.77145 0

OCM 0.769609 0.17141 4.48986 0

LAC 0.995539 1.602721 0.621156 0.537

SOIL 1.750612 0.667029 2.624491 0.011

SEASALT -0.5351 0.530511 -1.00866 0.318

Valid cases: 62 RSquared: 0.985

Lassen Volcanic National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.8782 2.9487 8.6951 0.1268 50.806 740

RECON 2.9977 3.1328 9.8144 0.1848 56.1967 740

ASULFATE 0.5153 0.4201 0.1765 0.0191 2.8872 740

ANO3 0.1879 0.275 0.0756 -0.0254 2.5039 740

OCM 1.6364 2.3024 5.3009 0.013 43.7413 740

LAC 0.17 0.3301 0.1089 -0.0479 8.1304 740

SOIL 0.4323 0.5613 0.3151 0.0012 10.1484 740

SEASALT 0.056 0.0762 0.0058 0.0002 0.5337 740

Lassen Volcanic National Park

Sulfate mass fraction 0.179

Nitrate mass fraction 0.065

OC mass fraction 0.569

LAC mass fraction 0.059

Soil mass fraction 0.15

Seasalt mass fraction 0.019

Missing mass fraction -0.042

Lassen Volcanic National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.026893 0.045304 0.593607 0.553

ASULFATE 1.520945 0.081844 18.58352 0

ANO3 0.433604 0.118198 3.668445 0

OCM 0.782112 0.022286 35.09445 0

LAC 1.41819 0.150173 9.44371 0

SOIL 1.168674 0.052589 22.22259 0

Appendix 1

45
DRAFT

SEASALT -0.71303 0.336188 -2.12093 0.034

Valid cases: 740 RSquared: 0.945

Linville Gorge

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.7822 4.2994 18.4845 0.5687 26.9621 77

RECON 6.2149 3.9314 15.4555 0.3694 23.1478 77

ASULFATE 2.7368 2.8435 8.0853 0.1232 18.7518 77

ANO3 0.4301 0.368 0.1354 0.0184 1.5662 77

OCM 2.3347 1.4342 2.0568 0.124 6.1956 77

LAC 0.2992 0.1662 0.0276 0.0368 0.7439 77

SOIL 0.3182 0.4799 0.2303 0.0016 3.6236 77

SEASALT 0.0959 0.1202 0.0145 0.0013 0.6706 77

Linville Gorge

Sulfate mass fraction 0.473

Nitrate mass fraction 0.074

OC mass fraction 0.404

LAC mass fraction 0.052

Soil mass fraction 0.055

Seasalt mass fraction 0.017

Missing mass fraction -0.075

Linville Gorge

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.42153 0.170742 -2.46882 0.016

ASULFATE 1.154647 0.029334 39.36218 0

ANO3 0.401575 0.209287 1.918777 0.059

OCM 0.926032 0.088642 10.44685 0

LAC 0.77979 0.808023 0.965059 0.338

SOIL 1.325114 0.177222 7.477136 0

SEASALT 0.562844 0.707693 0.795322 0.429

Valid cases: 77 RSquared: 0.980

Livonia

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 9.9134 5.4299 29.4842 2.0009 37.1934 82

RECON 10.3012 4.6488 21.6115 2.5647 31.3306 82

ASULFATE 4.3923 3.5767 12.7929 0.6154 24.6248 82

ANO3 2.6037 1.8265 3.336 0.1197 7.6576 82

OCM 2.3409 1.0932 1.195 0.5026 7.2995 82

LAC 0.3995 0.1679 0.0282 0.1019 0.8847 82

SOIL 0.4041 0.3753 0.1408 0.0302 3.0268 82

SEASALT 0.1607 0.1668 0.0278 0.0008 0.7028 82

Livonia

Sulfate mass fraction 0.443

Nitrate mass fraction 0.263

OC mass fraction 0.236

LAC mass fraction 0.04

Appendix 1

46
DRAFT

Soil mass fraction 0.041

Seasalt mass fraction 0.016

Missing mass fraction -0.039

Livonia

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.93389 0.277216 -3.3688 0.001

ASULFATE 1.270321 0.031885 39.84084 0

ANO3 0.923977 0.054344 17.00244 0

OCM 0.894423 0.11886 7.52503 0

LAC 0.383886 0.901872 0.425655 0.672

SOIL 1.497933 0.2714 5.519279 0

SEASALT 0.059206 0.586996 0.100862 0.92

Valid cases: 82 RSquared: 0.978

Lostwood

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.9258 2.5378 6.4405 0.5631 15.6728 114

RECON 4.1562 2.4497 6.0013 0.507 13.2761 114

ASULFATE 1.1814 0.8125 0.6602 0.1213 4.2141 114

ANO3 0.8488 1.1347 1.2876 0.0432 7.2185 114

OCM 1.2758 1.0646 1.1334 0.1602 6.3679 114

LAC 0.1397 0.1076 0.0116 0.0122 0.7401 114

SOIL 0.5532 0.4977 0.2477 0.0086 2.627 114

SEASALT 0.1573 0.3041 0.0925 0.0007 1.9933 114

Lostwood

Sulfate mass fraction 0.301

Nitrate mass fraction 0.216

OC mass fraction 0.325

LAC mass fraction 0.036

Soil mass fraction 0.141

Seasalt mass fraction 0.04

Missing mass fraction -0.059

Lostwood

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.30081 0.096552 -3.11553 0.002

ASULFATE 1.064481 0.072005 14.78351 0

ANO3 1.121493 0.052169 21.49723 0

OCM 0.855766 0.099131 8.632712 0

LAC 0.80061 0.971624 0.823992 0.412

SOIL 1.302303 0.099331 13.11079 0

SEASALT 0.591798 0.16427 3.602595 0

Valid cases: 114 

R-Squared: 0.966

Lye Brook Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.6808 5.0929 25.9379 0.1523 43.2012 555

RECON 5.3627 4.6278 21.4161 0.2889 37.1191 555

Appendix 1

47
DRAFT

ASULFATE 2.7181 3.1398 9.8586 0.0715 31.9267 555

ANO3 0.5106 0.6358 0.4042 0.0151 5.978 555

OCM 1.6179 1.3452 1.8095 0.0059 11.1026 555

LAC 0.2287 0.1781 0.0317 -0.0156 1.2122 555

SOIL 0.2264 0.2764 0.0764 0.0017 3.9373 555

SEASALT 0.061 0.0886 0.0079 0.0003 1.1675 555

Lye Brook Wilderness

Sulfate mass fraction 0.478

Nitrate mass fraction 0.09

OC mass fraction 0.285

LAC mass fraction 0.04

Soil mass fraction 0.04

Seasalt mass fraction 0.011

Missing mass fraction 0.056

Lye Brook Wilderness

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.249266 0.086137 2.893841 0.004

ASULFATE 1.100848 0.022937 47.99525 0

ANO3 0.370268 0.0856 4.325555 0

OCM 1.321023 0.06241 21.16675 0

LAC -0.25091 0.55803 -0.44964 0.653

SOIL 1.016611 0.208999 4.8642 0

SEASALT -0.98002 0.528607 -1.85397 0.064

Valid cases: 555 

R-Squared: 0.954

Mammoth Cave National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 13.0074 7.2857 53.0815 2.3048 41.2177 390

RECON 12.6765 6.5351 42.7072 2.7823 33.7568 390

ASULFATE 7.0822 4.81 23.1361 0.8896 25.917 390

ANO3 0.8877 1.0272 1.0552 0.1036 9.4552 390

OCM 3.5994 2.0224 4.0902 0.2504 15.7457 390

LAC 0.4927 0.2569 0.066 0.0058 2.4143 390

SOIL 0.5565 1.0982 1.2059 0.0548 18.0659 390

SEASALT 0.058 0.0985 0.0097 0.0005 1.2106 390

Mammoth Cave National Park

Sulfate mass fraction 0.544

Nitrate mass fraction 0.068

OC mass fraction 0.277

LAC mass fraction 0.038

Soil mass fraction 0.043

Seasalt mass fraction 0.004

Missing mass fraction 0.025

Mammoth Cave National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.946 0.279912 3.379631 0.001

ASULFATE 1.06732 0.028443 37.52513 0

Appendix 1

48
DRAFT

ANO3 0.192947 0.118909 1.62264 0.105

OCM 1.257339 0.100032 12.56931 0

LAC -1.59722 0.743522 -2.14818 0.032

SOIL 1.226117 0.104593 11.72269 0

SEASALT -1.54823 1.136589 -1.36217 0.174

Valid cases: 390 RSquared: 0.910

Medicine Lake

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.3927 3.3235 11.0456 0.7783 34.7222 134

RECON 3.5004 3.3958 11.5313 0.9609 35.6893 134

ASULFATE 0.8622 0.5665 0.321 0.1394 3.3936 134

ANO3 0.515 0.6329 0.4006 -0.0163 2.9682 134

OCM 1.345 2.6491 7.0175 -0.2074 28.3334 134

LAC 0.1222 0.1219 0.0149 -0.0091 1.1204 134

SOIL 0.5767 0.7203 0.5188 0.0897 4.7782 134

SEASALT 0.0792 0.0818 0.0067 0.0002 0.3644 134

Medicine Lake

Sulfate mass fraction 0.254

Nitrate mass fraction 0.152

OC mass fraction 0.396

LAC mass fraction 0.036

Soil mass fraction 0.17

Seasalt mass fraction 0.023

Missing mass fraction -0.032

Medicine Lake

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.006816 0.073142 0.093186 0.926

ASULFATE 1.079165 0.062305 17.32069 0

ANO3 0.753531 0.056774 13.27246 0

OCM 0.971572 0.030866 31.47712 0

LAC 0.124897 0.658219 0.18975 0.85

SOIL 1.171504 0.054953 21.31832 0

SEASALT 0.880639 0.382342 2.303276 0.023

Valid cases: 134 

R-Squared: 0.989

Mesa Verde National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.4372 2.5009 6.2545 0.3671 37.5969 765

RECON 3.2277 2.389 5.7072 0.4265 43.7338 765

ASULFATE 0.9562 0.5537 0.3066 0.1203 4.4619 765

ANO3 0.1522 0.1154 0.0133 -0.0626 0.8688 765

OCM 1.0807 0.772 0.5961 -0.1139 9.167 765

LAC 0.1233 0.0779 0.0061 -0.0176 0.6838 765

SOIL 0.8768 1.7933 3.2159 0.0197 38.18 765

SEASALT 0.0385 0.0543 0.0029 0.0002 0.4077 765

Mesa Verde National Park

Appendix 1

49
DRAFT

Sulfate mass fraction 0.278

Nitrate mass fraction 0.044

OC mass fraction 0.314

LAC mass fraction 0.036

Soil mass fraction 0.255

Seasalt mass fraction 0.011

Missing mass fraction 0.061

Mesa Verde National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.100203 0.071878 1.394069 0.164

ASULFATE 1.31749 0.05629 23.40519 0

ANO3 1.266452 0.275006 4.605188 0

OCM 0.803454 0.049752 16.14916 0

LAC 0.736447 0.477827 1.541244 0.124

SOIL 1.000798 0.01783 56.12908 0

SEASALT 1.243314 0.541039 2.298011 0.022

Valid cases: 765 RSquared: 0.901

Mingo

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 9.4957 6.3518 40.346 2.3667 31.394 43

RECON 8.1167 5.631 31.7081 1.4296 24.3283 43

ASULFATE 2.4264 1.6915 2.861 0.4286 9.5646 43

ANO3 1.9071 2.5585 6.546 0.0964 11.1769 43

OCM 2.4443 2.7092 7.3399 0.1663 11.5664 43

LAC 0.2748 0.2346 0.0551 0 1.1085 43

SOIL 0.8678 1.9074 3.6382 0.1784 12.7566 43

SEASALT 0.1962 0.2898 0.084 0.0018 1.2324 43

Mingo

Sulfate mass fraction 0.256

Nitrate mass fraction 0.201

OC mass fraction 0.257

LAC mass fraction 0.029

Soil mass fraction 0.091

Seasalt mass fraction 0.021

Missing mass fraction 0.145

Mingo

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.628452 0.574827 1.09329 0.282

ASULFATE 1.370462 0.185091 7.404253 0

ANO3 1.097243 0.128829 8.517019 0

OCM 0.628289 0.255936 2.454868 0.019

LAC 1.119552 3.059741 0.365898 0.717

SOIL 1.542458 0.1666 9.258472 0

SEASALT 1.363044 1.008562 1.351473 0.185

Valid cases: 43 RSquared: 0.930

Appendix 1

50
DRAFT

MK Goddard

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 8.1667 4.102 16.8262 1.4995 20.3411 102

RECON 9.0744 4.2328 17.9167 2.2047 21.8269 102

ASULFATE 3.4325 2.0629 4.2555 0.7058 12.3021 102

ANO3 1.9234 1.8779 3.5264 0.1336 9.2249 102

OCM 2.7938 1.5886 2.5236 0.5677 9.5593 102

LAC 0.45 0.1971 0.0388 0.1224 1.0126 102

SOIL 0.3132 0.1692 0.0286 0.0379 0.9169 102

SEASALT 0.1614 0.2073 0.043 0.0008 1.4035 102

MK Goddard

Sulfate mass fraction 0.42

Nitrate mass fraction 0.236

OC mass fraction 0.342

LAC mass fraction 0.055

Soil mass fraction 0.038

Seasalt mass fraction 0.02

Missing mass fraction -0.111

MK Goddard

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.30625 0.174509 -1.75492 0.082

ASULFATE 1.186059 0.04054 29.25641 0

ANO3 0.83072 0.035754 23.23444 0

OCM 0.959863 0.072762 13.19186 0

LAC 0.438642 0.669514 0.655165 0.514

SOIL -0.20895 0.421385 -0.49586 0.621

SEASALT -0.06002 0.339205 -0.17696 0.86

Valid cases: 102 RSquared: 0.978

Mount Hood

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 1.7334 1.6364 2.6779 -0.2151 9.1777 149

RECON 1.7625 1.7186 2.9536 -0.0707 9.8381 149

ASULFATE 0.3974 0.3227 0.1041 0.0192 1.4974 149

ANO3 0.1356 0.1378 0.019 -0.0366 0.6665 149

OCM 0.7909 1.1739 1.3782 -0.243 7.8032 149

LAC 0.0716 0.0715 0.0051 -0.003 0.3635 149

SOIL 0.2272 0.3573 0.1277 0.0004 2.2942 149 0

SEASALT 0.1398 0.1696 0.0288 0.0008 1.0169 149

Mount Hood

Sulfate mass fraction 0.229

Nitrate mass fraction 0.078

OC mass fraction 0.456

LAC mass fraction 0.041

Soil mass fraction 0.131

Seasalt mass fraction 0.081

Missing mass fraction -0.017

Appendix 1

51
DRAFT

Mount Hood

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.054778 0.037508 1.460456 0.146

ASULFATE 1.358463 0.099511 13.65141 0

ANO3 0.292333 0.181773 1.608228 0.11

OCM 0.984287 0.036055 27.29941 0

LAC -1.44124 0.612769 -2.352 0.02

SOIL 1.108621 0.061637 17.98643 0

SEASALT 1.230287 0.113944 10.79728 0

Valid cases: 149 RSquared: 0.982

Mohawk Mountain

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.9694 4.1791 17.4645 1.1137 18.5185 53

RECON 5.594 4.9539 24.5413 1.2777 23.5024 53

ASULFATE 2.5459 2.9381 8.6325 0.4712 12.8283 53

ANO3 0.5878 0.762 0.5806 0.0675 4.204 53

OCM 1.6458 1.188 1.4114 0.2311 5.8009 53

LAC 0.2245 0.1518 0.023 0.0443 0.7809 53

SOIL 0.2201 0.1745 0.0304 0.0156 0.752 53

SEASALT 0.3699 0.7492 0.5612 0.0015 3.4319 53

Mohawk Mountain

Sulfate mass fraction 0.512

Nitrate mass fraction 0.118

OC mass fraction 0.331

LAC mass fraction 0.045

Soil mass fraction 0.044

Seasalt mass fraction 0.074

Missing mass fraction -0.126

Mohawk Mountain

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.008847 0.168968 0.052359 0.958

ASULFATE 0.977071 0.053847 18.14542 0

ANO3 0.483488 0.288909 1.673495 0.101

OCM 1.021154 0.121905 8.376605 0

LAC 1.042486 1.302501 0.800373 0.428

SOIL 1.909979 0.485912 3.930711 0

SEASALT -0.39481 0.228192 -1.73015 0.09

Valid cases: 53 RSquared: 0.986

Monture

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.9725 6.5433 42.8145 0.1235 42.5513 113

RECON 4.6171 7.9325 62.9246 0.4931 52.4062 113

ASULFATE 0.4723 0.3258 0.1061 0.0502 1.6801 113

ANO3 0.137 0.1594 0.0254 -0.0143 1.3287 113

OCM 3.3619 7.0919 50.295 0.0774 47.2021 113

LAC 0.2245 0.4339 0.1883 0 2.8848 113

Appendix 1

52
DRAFT

SOIL 0.3492 0.4688 0.2198 0.0014 2.5433 113

SEASALT 0.0721 0.0664 0.0044 0.0007 0.2968 113

Monture

Sulfate mass fraction 0.119

Nitrate mass fraction 0.034

OC mass fraction 0.846

LAC mass fraction 0.057

Soil mass fraction 0.088

Seasalt mass fraction 0.018

Missing mass fraction -0.162

Monture

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.075311 0.114284 0.658979 0.511

ASULFATE 1.044185 0.172002 6.070781 0

ANO3 0.614945 0.391752 1.569731 0.119

OCM 0.929322 0.036449 25.49649 0

LAC -1.4087 0.577444 -2.43955 0.016

SOIL 1.545821 0.134143 11.52365 0

SEASALT -0.3898 0.794515 -0.49062 0.625

Valid cases: 113 

R-Squared: 0.994

Moosehorn National Wildlife Refuge

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.8715 3.12 9.7345 0.7645 26.0034 531

RECON 4.9119 3.0017 9.0099 0.7126 26.4267 531

ASULFATE 1.9892 1.6249 2.6402 0.1397 19.0537 531

ANO3 0.3491 0.3473 0.1206 -0.0316 2.4376 531

OCM 1.8917 1.6264 2.6452 0.2686 22.0955 531

LAC 0.2473 0.3443 0.1185 0.0097 6.9566 531

SOIL 0.209 0.1582 0.025 0.0037 1.5105 531

SEASALT 0.2256 0.5019 0.2519 0.0003 6.7884 531

Moosehorn National Wildlife Refuge

Sulfate mass fraction 0.408

Nitrate mass fraction 0.072

OC mass fraction 0.388

LAC mass fraction 0.051

Soil mass fraction 0.043

Seasalt mass fraction 0.046

Missing mass fraction -0.008

Moosehorn National Wildlife Refuge

CONSTANT -0.05094 0.073152 -0.69636 0.487

ASULFATE 1.126235 0.024389 46.17856 0

ANO3 0.623958 0.112546 5.544022 0

OCM 0.9237 0.024652 37.46975 0

LAC 0.681051 0.105803 6.43698 0

SOIL 1.498449 0.241708 6.199421 0

SEASALT 1.043332 0.07291 14.30989 0

Appendix 1

53
DRAFT

Valid cases: 531 

R-Squared: 0.934

Mount Rainier National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.4514 3.5619 12.6872 0.0305 28.4259 973

RECON 4.3768 3.3288 11.0809 0.1566 24.5174 973

ASULFATE 1.0738 1.0983 1.2062 0.0129 9.2961 973

ANO3 0.2012 0.2204 0.0486 -0.0378 1.9506 973

OCM 2.4701 2.1294 4.5344 -0.1863 13.8767 973

LAC 0.3266 0.307 0.0943 -0.0246 2.1223 973

SOIL 0.1843 0.2504 0.0627 0.0024 3.4598 973

SEASALT 0.1209 0.201 0.0404 0.0002 1.9244 973

Mount Rainier National Park

Sulfate mass fraction 0.241

Nitrate mass fraction 0.045

OC mass fraction 0.555

LAC mass fraction 0.073

Soil mass fraction 0.041

Seasalt mass fraction 0.027

Missing mass fraction 0.017

Mount Rainier National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.08776 0.052916 -1.65845 0.098

ASULFATE 1.300929 0.034811 37.37084 0

ANO3 0.760911 0.172667 4.406805 0

OCM 0.881382 0.033523 26.29209 0

LAC 1.553736 0.223319 6.95746 0

SOIL 0.903823 0.135608 6.664986 0

SEASALT 1.14206 0.15173 7.526926 0

Valid cases: 973 RSquared: 0.936

Mount Zirkel Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.6414 1.9603 3.8429 -0.2537 22.3264 372

RECON 2.7451 1.8688 3.4925 0.2679 24.1315 372

ASULFATE 0.7617 0.4217 0.1779 0.125 2.9015 372

ANO3 0.188 0.1931 0.0373 0.015 2.4249 372

OCM 1.0727 1.1758 1.3825 -0.0783 16.4358 372

LAC 0.1053 0.0828 0.0069 -0.006 1.0104 372

SOIL 0.5738 0.6448 0.4157 0.0015 5.7191 372

SEASALT 0.0437 0.0794 0.0063 0.0002 0.4592 372

Mount Zirkel Wilderness

Sulfate mass fraction 0.288

Nitrate mass fraction 0.071

OC mass fraction 0.406

LAC mass fraction 0.04

Soil mass fraction 0.217

Appendix 1

54
DRAFT

Seasalt mass fraction 0.017

Missing mass fraction -0.039

Mount Zirkel Wilderness

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.20953 0.06819 -3.0728 0.002

ASULFATE 1.245482 0.075631 16.46776 0

ANO3 0.307968 0.18125 1.699135 0.09

OCM 0.94444 0.042851 22.04023 0

LAC 1.674417 0.598649 2.796993 0.005

SOIL 1.10769 0.051008 21.71583 0

SEASALT 0.442739 0.383783 1.153618 0.249

Valid cases: 372 

R-Squared: 0.917

Nebraska National Forest

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.3213 3.0437 9.2644 0.8903 14.6051 51

RECON 4.6226 3.2848 10.79 0.9365 15.2499 51

ASULFATE 1.2567 0.9021 0.8138 0.1565 3.7137 51

ANO3 0.8364 1.2471 1.5553 0.0399 5.6815 51

OCM 1.7426 2.0315 4.1272 0.187 11.9185 51

LAC 0.1589 0.1379 0.019 0.0089 0.7246 51

SOIL 0.5353 0.362 0.131 0.1358 1.784 51

SEASALT 0.0927 0.0994 0.0099 0.008 0.488 51

Nebraska National Forest

Sulfate mass fraction 0.291

Nitrate mass fraction 0.194

OC mass fraction 0.403

LAC mass fraction 0.037

Soil mass fraction 0.124

Seasalt mass fraction 0.021

Missing mass fraction -0.07

Nebraska National Forest

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.091753 0.137273 0.668396 0.507

ASULFATE 1.052856 0.131532 8.004548 0

ANO3 0.803277 0.068139 11.78875 0

OCM 1.201074 0.122861 9.775889 0

LAC -3.35257 2.015486 -1.6634 0.103

SOIL 1.600571 0.211519 7.567034 0

SEASALT -1.96611 0.726552 -2.70608 0.01

Valid cases: 51 RSquared: 0.979

North Absaroka

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.5139 3.4726 12.0592 -0.0626 27.0195 154

RECON 2.6699 3.6244 13.136 0.4184 27.8708 154

ASULFATE 0.5401 0.384 0.1475 0.0488 2.1321 154

Appendix 1

55
DRAFT

ANO3 0.1585 0.1368 0.0187 0.0119 0.8104 154

OCM 1.4167 2.9971 8.9825 0.0169 24.2181 154

LAC 0.1058 0.1767 0.0312 0 1.3032 154

SOIL 0.3703 0.4693 0.2202 0.0066 3.6465 154

SEASALT 0.0786 0.0801 0.0064 0.0008 0.6876 154

North Absaroka

Sulfate mass fraction 0.215

Nitrate mass fraction 0.063

OC mass fraction 0.564

LAC mass fraction 0.042

Soil mass fraction 0.147

Seasalt mass fraction 0.031

Missing mass fraction -0.062

North Absaroka

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.1386 0.086913 -1.59467 0.113

ASULFATE 0.818863 0.15384 5.322836 0

ANO3 0.76911 0.371933 2.067871 0.04

OCM 0.70006 0.046532 15.04464 0

LAC 4.97863 0.816538 6.097241 0

SOIL 1.295008 0.100611 12.87143 0

SEASALT 1.149531 0.530365 2.167432 0.032

Valid cases: 154 

R-Squared: 0.979

North Cascades

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.3291 2.435 5.9293 0.0628 13.5269 163

RECON 2.5541 2.6785 7.1744 0.036 15.3449 163

ASULFATE 0.6072 0.5833 0.3402 0.0154 3.2696 163

ANO3 0.134 0.1627 0.0265 -0.0221 1.0365 163

OCM 1.396 1.9428 3.7744 -0.0913 14.0528 163

LAC 0.1053 0.1161 0.0135 0 0.6281 163

SOIL 0.2195 0.6489 0.4211 0.0012 5.0581 163

SEASALT 0.0921 0.0974 0.0095 0.0002 0.6127 163

North Cascades

Sulfate mass fraction 0.261

Nitrate mass fraction 0.058

OC mass fraction 0.599

LAC mass fraction 0.045

Soil mass fraction 0.094

Seasalt mass fraction 0.04

Missing mass fraction -0.097

North Cascades

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.10689 0.060354 -1.7711 0.078

ASULFATE 1.621273 0.111633 14.52323 0

ANO3 -0.35249 0.352667 -0.99951 0.319

Appendix 1

56
DRAFT

OCM 0.823406 0.041032 20.06719 0

LAC -0.35341 0.757207 -0.46673 0.641

SOIL 1.088149 0.054571 19.94024 0

SEASALT 1.601841 0.346033 4.629154 0

Valid cases: 163 

R-Squared: 0.973

Northern Cheyenne

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.8762 8.9787 80.6166 0.2682 46.8782 47

RECON 5.5072 9.1075 82.9465 0.4745 52.1623 47

ASULFATE 0.9664 1.7456 3.0471 0.1697 11.8464 47

ANO3 0.2319 0.5704 0.3254 0.0243 3.8486 47

OCM 3.3902 5.9242 35.0958 0.1564 27.9428 47

LAC 0.2354 0.4785 0.2289 0.0059 2.9779 47

SOIL 0.6126 1.039 1.0796 0.0432 7.2232 47

SEASALT 0.0707 0.0841 0.0071 0.0032 0.3245 47

Northern Cheyenne

Sulfate mass fraction 0.164

Nitrate mass fraction 0.039

OC mass fraction 0.577

LAC mass fraction 0.04

Soil mass fraction 0.104

Seasalt mass fraction 0.012

Missing mass fraction 0.063

Northern Cheyenne

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.324604 0.608419 0.533521 0.597

ASULFATE -3.69873 1.17086 -3.15898 0.003

ANO3 -1.71073 2.26312 -0.75592 0.454

OCM 0.559234 0.194981 2.868147 0.007

LAC 6.044124 2.018383 2.994538 0.005

SOIL 10.51746 1.547935 6.794509 0

SEASALT -3.38346 5.108151 -0.66237 0.512

Valid cases: 47 RSquared: 0.913

Okefenokee National Wildlife Refuge 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 10.3403 5.569 31.0134 2.4913 47.4265 565

RECON 10.4077 6.2189 38.6751 2.6577 77.7446 565

ASULFATE 4.8121 3.0509 9.3079 0.6419 23.4351 565

ANO3 0.542 0.3078 0.0947 0.0709 2.2501 565

OCM 3.597 4.0851 16.6884 0.8833 71.6861 565

LAC 0.436 0.3907 0.1527 -0.0033 4.9318 565

SOIL 0.7917 2.0849 4.3467 0.0254 25.3715 565

SEASALT 0.229 0.377 0.1421 0.0002 3.0884 565

Okefenokee National Wildlife Refuge 

Sulfate mass fraction 0.465

Appendix 1

57
DRAFT

Nitrate mass fraction 0.052

OC mass fraction 0.348

LAC mass fraction 0.042

Soil mass fraction 0.077

Seasalt mass fraction 0.022

Missing mass fraction -0.007

Okefenokee National Wildlife Refuge 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.752751 0.139333 5.402531 0

ASULFATE 1.124254 0.018217 61.71493 0

ANO3 0.386951 0.202388 1.911924 0.056

OCM 0.536457 0.021869 24.53094 0

LAC 2.511929 0.242462 10.36008 0

SOIL 1.012374 0.027118 37.33214 0

SEASALT 0.618427 0.160642 3.849729 0

Valid cases: 565 RSquared: 0.948

Old Town

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.2913 5.3869 29.019 1.462 31.6595 139

RECON 8.1464 6.016 36.1925 1.2459 35.0456 139

ASULFATE 2.8067 1.9589 3.8374 0.4298 14.0522 139

ANO3 0.601 0.6467 0.4182 0.0524 4.2405 139

OCM 3.5043 3.3688 11.3488 -0.1577 21.6266 139

LAC 0.4941 0.4486 0.2013 0 2.6394 139

SOIL 0.496 0.6057 0.3668 0.0149 5.4223 139

SEASALT 0.2442 0.2916 0.085 0.0028 1.6703 139

Old Town

Sulfate mass fraction 0.385

Nitrate mass fraction 0.082

OC mass fraction 0.481

LAC mass fraction 0.068

Soil mass fraction 0.068

Seasalt mass fraction 0.033

Missing mass fraction -0.117

Old Town

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.18366 0.103252 -1.77871 0.078

ASULFATE 1.15094 0.043167 26.66244 0

ANO3 0.970271 0.131174 7.396797 0

OCM 0.719085 0.025158 28.58279 0

LAC 0.969047 0.16477 5.881221 0

SOIL 1.013616 0.101924 9.944828 0

SEASALT 0.655157 0.191322 3.424359 0.001

Valid cases: 139 RSquared: 0.987

Olympic

Appendix 1

58
DRAFT

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.4856 1.6739 2.8019 0.4166 7.8302 146

RECON 2.7964 1.8012 3.2442 0.5273 9.342 146

ASULFATE 0.7103 0.5547 0.3077 0.0638 2.5828 146

ANO3 0.3126 0.2756 0.076 -0.0191 1.3781 146

OCM 1.3195 1.1145 1.2421 0.2344 6.6175 146

LAC 0.1144 0.0752 0.0057 0.0091 0.4113 146

SOIL 0.0852 0.0902 0.0081 0.0015 0.7456 146

SEASALT 0.2545 0.3689 0.1361 0.0002 2.0333 146

Olympic

Sulfate mass fraction 0.286

Nitrate mass fraction 0.126

OC mass fraction 0.531

LAC mass fraction 0.046

Soil mass fraction 0.034

Seasalt mass fraction 0.102

Missing mass fraction -0.125

Olympic

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.068112 0.059246 1.149648 0.252

ASULFATE 1.150588 0.072162 15.94452 0

ANO3 0.960425 0.142883 6.721778 0

OCM 0.960645 0.048188 19.93546 0

LAC -2.5056 0.672395 -3.72638 0

SOIL 1.359451 0.370122 3.672981 0

SEASALT 0.798803 0.0771 10.36065 0

Valid cases: 146 

R-Squared: 0.963

Pasayten

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.0309 3.9352 15.4859 0.0326 23.1325 137

RECON 3.1866 4.3777 19.164 0.1237 25.4485 137

ASULFATE 0.4362 0.4105 0.1685 0.0202 2.9375 137

ANO3 0.1321 0.1649 0.0272 -0.0071 1.1453 137

OCM 1.9962 3.7085 13.7526 -0.0079 22.3893 137

LAC 0.1193 0.1625 0.0264 0 0.8474 137

SOIL 0.4131 0.7434 0.5527 0.0045 6.0257 137

SEASALT 0.0897 0.1128 0.0127 0.0005 0.9611 137

Pasayten

Sulfate mass fraction 0.144

Nitrate mass fraction 0.044

OC mass fraction 0.659

LAC mass fraction 0.039

Soil mass fraction 0.136

Seasalt mass fraction 0.03

Missing mass fraction -0.051

Pasayten

Appendix 1

59
DRAFT

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.19939 0.076688 -2.60005 0.01

ASULFATE 1.541688 0.140586 10.96618 0

ANO3 0.836967 0.331968 2.52123 0.013

OCM 0.847503 0.036991 22.91109 0

LAC -0.00482 0.875859 -0.0055 0.996

SOIL 1.21168 0.070302 17.23535 0

SEASALT 2.848397 0.42629 6.681828 0

Valid cases: 137 

R-Squared: 0.982

Petrified Forest National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.1956 2.17 4.7088 0.8941 25.4948 701

RECON 4.057 1.9168 3.6741 0.9827 22.6503 701

ASULFATE 1.1315 0.6259 0.3918 0.186 4.559 701

ANO3 0.2172 0.1611 0.026 -0.0004 1.2845 701

OCM 1.4256 0.8435 0.7116 -0.0569 7.0672 701

LAC 0.2697 0.1508 0.0227 -0.0245 0.9228 701

SOIL 0.9584 1.1365 1.2917 0.0632 19.6805 701

SEASALT 0.0546 0.0927 0.0086 0.0002 1.192 701

Petrified Forest National Park

Sulfate mass fraction 0.27

Nitrate mass fraction 0.052

OC mass fraction 0.34

LAC mass fraction 0.064

Soil mass fraction 0.228

Seasalt mass fraction 0.013

Missing mass fraction 0.033

Petrified Forest National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.0927 0.08792 -1.05439 0.292

ASULFATE 1.350578 0.055832 24.19021 0

ANO3 0.767788 0.225193 3.409471 0.001

OCM 0.582742 0.049325 11.81431 0

LAC 2.134267 0.267508 7.978332 0

SOIL 1.181379 0.031674 37.29799 0

SEASALT 1.003088 0.351797 2.851328 0.004

Valid cases: 701 

R-Squared: 0.850

Phoenix

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 12.1602 6.0476 36.573 3.977 38.7944 185

RECON 13.8882 7.9645 63.4325 4.8848 52.2961 185

ASULFATE 1.6336 0.7563 0.572 0.4071 4.4797 185

ANO3 1.4306 2.2506 5.0654 0.1232 17.6022 185

OCM 6.4961 5.5971 31.3275 1.3921 37.5874 185

LAC 0.9427 0.7588 0.5758 0.1821 4.7085 185

SOIL 3.1585 1.9194 3.6841 0.3569 13.7944 185

Appendix 1

60
DRAFT

SEASALT 0.2268 0.2864 0.082 0.0015 2.7596 185

Phoenix

Sulfate mass fraction 0.134

Nitrate mass fraction 0.118

OC mass fraction 0.534

LAC mass fraction 0.078

Soil mass fraction 0.26

Seasalt mass fraction 0.019

Missing mass fraction -0.142

Phoenix

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.06257 0.359724 -0.17394 0.862

ASULFATE 1.283245 0.145934 8.793302 0

ANO3 0.676553 0.058431 11.57868 0

OCM 0.715265 0.035129 20.36136 0

LAC 0.777246 0.235003 3.307391 0.001

SOIL 1.133509 0.054573 20.77066 0

SEASALT 0.879209 0.383344 2.293524 0.023

Valid cases: 185 RSquared: 0.949

Pinnacles National Monument

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.6928 3.0075 9.0453 0.443 19.6059 1043

RECON 5.7613 2.9328 8.6011 0.6319 26.8802 1043

ASULFATE 1.3569 0.8465 0.7165 0.0908 5.4429 1043

ANO3 1.1163 0.962 0.9254 0.0021 11.573 1043

OCM 2.2325 1.5202 2.3111 0.0752 12.0521 1043

LAC 0.3294 0.271 0.0734 -0.038 2.6227 1043

SOIL 0.4109 0.4382 0.192 0.0055 7.1216 1043

SEASALT 0.3153 0.4394 0.1931 0.001 2.9121 1043

Pinnacles National Monument

Sulfate mass fraction 0.238

Nitrate mass fraction 0.196

OC mass fraction 0.392

LAC mass fraction 0.058

Soil mass fraction 0.072

Seasalt mass fraction 0.055

Missing mass fraction -0.012

Pinnacles National Monument

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.05652 0.076856 -0.73545 0.462

ASULFATE 1.317884 0.044215 29.80593 0

ANO3 0.644769 0.042958 15.00931 0

OCM 0.922018 0.039221 23.5082 0

LAC 0.889015 0.227722 3.903947 0

SOIL 1.281641 0.082657 15.50554 0

SEASALT 1.152865 0.080292 14.35839 0

Appendix 1

61
DRAFT

Valid cases: 1043 

R-Squared: 0.881

Proctor Maple RF

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.7344 2.6993 7.2863 0.5165 17.3612 98

RECON 4.1106 2.7303 7.4543 0.8281 17.5468 98

ASULFATE 1.4372 1.2786 1.6348 0.2075 10.7868 98

ANO3 0.5867 0.9929 0.9859 0.0424 7.4338 98

OCM 1.6135 1.0554 1.1138 0.2914 6.9503 98

LAC 0.1971 0.1191 0.0142 0.0403 0.7745 98

SOIL 0.1537 0.1246 0.0155 0.0027 0.6586 98

SEASALT 0.1224 0.1653 0.0273 0.0015 1.3574 98

Proctor Maple RF

Sulfate mass fraction 0.385

Nitrate mass fraction 0.157

OC mass fraction 0.432

LAC mass fraction 0.053

Soil mass fraction 0.041

Seasalt mass fraction 0.033

Missing mass fraction -0.101

Proctor Maple RF

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.15853 0.086356 -1.83579 0.07

ASULFATE 1.069783 0.039994 26.74881 0

ANO3 0.984806 0.054593 18.03892 0

OCM 1.16677 0.059855 19.49334 0

LAC -1.11963 0.756012 -1.48097 0.142

SOIL 0.726394 0.380219 1.910464 0.059

SEASALT 0.033424 0.24141 0.138455 0.89

Valid cases: 98 RSquared: 0.981

Point Reyes National Seashore

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 6.8681 4.184 17.506 0.6173 28.9116 1258

RECON 6.4583 4.3769 19.1571 0.4802 43.2271 1258

ASULFATE 1.5794 0.9729 0.9466 0.0026 6.1745 1258

ANO3 1.0624 2.1832 4.7663 0 29.6028 1258

OCM 1.4842 1.7864 3.1913 -0.2648 19.3118 1258

LAC 0.147 0.2402 0.0577 -0.0499 2.5799 1258

SOIL 0.2035 0.2541 0.0646 0.0047 4.3284 1258

SEASALT 1.9817 1.9445 3.7812 0.0035 12.8419 1258

Point Reyes National Seashore

Sulfate mass fraction 0.23

Nitrate mass fraction 0.155

OC mass fraction 0.216

LAC mass fraction 0.021

Appendix 1

62
DRAFT

Soil mass fraction 0.03

Seasalt mass fraction 0.289

Missing mass fraction 0.06

Point Reyes National Seashore

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.274569 0.083551 3.286243 0.001

ASULFATE 1.284861 0.040532 31.70024 0

ANO3 0.742744 0.027008 27.50102 0

OCM 1.0728 0.037713 28.44645 0

LAC -0.87338 0.345438 -2.52834 0.012

SOIL 1.261053 0.157415 8.01099 0

SEASALT 1.036794 0.020688 50.11517 0

Valid cases: 1258 

R-Squared: 0.900

Presque Isle

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.7916 3.3108 10.9614 1.0504 20.9235 141

RECON 5.3813 3.8721 14.9932 1.1147 25.1175 141

ASULFATE 1.5974 1.5539 2.4145 0.2661 15.3012 141

ANO3 0.4033 0.5823 0.3391 -0.015 5.2962 141

OCM 2.2445 1.8785 3.5289 0.3992 13.7889 141

LAC 0.2927 0.1878 0.0353 0.0734 1.0843 141

SOIL 0.6742 0.7983 0.6372 0.0147 5.7091 141

SEASALT 0.1692 0.2333 0.0544 0.0017 1.2721 141

Presque Isle

Sulfate mass fraction 0.333

Nitrate mass fraction 0.084

OC mass fraction 0.468

LAC mass fraction 0.061

Soil mass fraction 0.141

Seasalt mass fraction 0.035

Missing mass fraction -0.123

Presque Isle

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.311236 0.087953 3.538663 0.001

ASULFATE 0.931112 0.03231 28.81806 0

ANO3 1.004636 0.109962 9.136206 0

OCM 0.721455 0.04159 17.34685 0

LAC 0.21687 0.354339 0.612039 0.542

SOIL 1.186673 0.054998 21.57677 0

SEASALT 0.620564 0.188482 3.292435 0.001

Valid cases: 141 RSquared: 0.979

Puget Sound

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.7615 4.9167 24.1737 1.7287 30.9466 470

RECON 9.0276 5.7285 32.8152 2.2777 39.8844 470

Appendix 1

63
DRAFT

ASULFATE 1.5907 1.0342 1.0695 0.184 6.6358 470

ANO3 0.961 0.9566 0.915 0.0676 7.9563 470

OCM 4.8324 3.9107 15.2933 0.9376 26.8322 470

LAC 0.8099 0.5834 0.3403 0.101 4.5015 470

SOIL 0.4466 0.4331 0.1876 0.0611 5.4094 470

SEASALT 0.3869 0.5139 0.2641 0.0005 3.608 470

Puget Sound

Sulfate mass fraction 0.205

Nitrate mass fraction 0.124

OC mass fraction 0.623

LAC mass fraction 0.104

Soil mass fraction 0.058

Seasalt mass fraction 0.05

Missing mass fraction -0.163

Puget Sound

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.15392 0.145085 -1.06093 0.289

ASULFATE 1.233544 0.081763 15.08687 0

ANO3 0.757303 0.088666 8.541092 0

OCM 0.747312 0.02398 31.16381 0

LAC 0.824211 0.141065 5.842752 0

SOIL 1.068626 0.172977 6.177853 0

SEASALT 1.212934 0.123655 9.809018 0

Valid cases: 470 

R-Squared: 0.929

Quaker City

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.7201 5.3821 28.9665 2.7293 32.5577 49

RECON 8.5263 5.1695 26.7235 2.6658 27.8257 49

ASULFATE 3.6757 3.8572 14.878 0.772 23.8294 49

ANO3 1.721 1.6002 2.5606 0.152 6.3934 49

OCM 2.2956 1.1974 1.4338 0.8723 5.1629 49

LAC 0.3842 0.2113 0.0446 0.1133 1.0038 49

SOIL 0.2904 0.1441 0.0208 0.0251 0.811 49

SEASALT 0.1595 0.3416 0.1167 0.0003 1.8298 49

Quaker City

Sulfate mass fraction 0.476

Nitrate mass fraction 0.223

OC mass fraction 0.297

LAC mass fraction 0.05

Soil mass fraction 0.038

Seasalt mass fraction 0.021

Missing mass fraction -0.104

Quaker City

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.06832 0.288035 -0.23718 0.814

ASULFATE 1.242616 0.040884 30.39336 0

Appendix 1

64
DRAFT

ANO3 0.809496 0.075641 10.70187 0

OCM 0.920065 0.205068 4.486641 0

LAC -0.05899 0.987904 -0.05971 0.953

SOIL -0.48465 1.254481 -0.38634 0.701

SEASALT -0.75755 0.427302 -1.77286 0.084

Valid cases: 49 RSquared: 0.981

Quabbin Summit

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.291 2.8149 7.9238 1.1721 15.3813 64

RECON 4.8312 3.3214 11.0315 1.3785 17.287 64

ASULFATE 1.8888 1.754 3.0765 0.4854 11.5976 64

ANO3 0.552 0.8683 0.754 0.056 5.5248 64

OCM 1.7735 1.2945 1.6757 0.3866 7.4513 64

LAC 0.2348 0.1212 0.0147 0.0534 0.5505 64

SOIL 0.2293 0.2052 0.0421 0.0141 1.0483 64

SEASALT 0.1527 0.2053 0.0422 0.0037 1.3585 64

Quabbin Summit

Sulfate mass fraction 0.44

Nitrate mass fraction 0.129

OC mass fraction 0.413

LAC mass fraction 0.055

Soil mass fraction 0.053

Seasalt mass fraction 0.036

Missing mass fraction -0.126

Quabbin Summit

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.308579 0.143521 2.150063 0.036

ASULFATE 0.986496 0.047252 20.87736 0

ANO3 0.694516 0.095489 7.273226 0

OCM 0.818247 0.088255 9.271416 0

LAC 0.497772 0.805713 0.617804 0.539

SOIL 1.238742 0.353711 3.502126 0.001

SEASALT -0.7621 0.351982 -2.16516 0.035

Valid cases: 64 RSquared: 0.974

Queen Valley

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.6485 3.5066 12.2966 1.142 27.6228 105

RECON 5.4395 2.9705 8.824 1.2323 22.3608 105

ASULFATE 1.3934 0.7048 0.4968 0.234 4.1825 105

ANO3 0.4045 0.5049 0.2549 0.0453 4.7985 105

OCM 1.5535 1.483 2.1994 0.4208 13.9043 105

LAC 0.166 0.112 0.0125 0 0.8412 105

SOIL 1.7991 1.4961 2.2384 0.1411 11.4968 105

SEASALT 0.123 0.2125 0.0451 0.0012 2.0504 105

Queen Valley

Appendix 1

65
DRAFT

Sulfate mass fraction 0.247

Nitrate mass fraction 0.072

OC mass fraction 0.275

LAC mass fraction 0.029

Soil mass fraction 0.319

Seasalt mass fraction 0.022

Missing mass fraction 0.037

Queen Valley

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.01782 0.245005 -0.07273 0.942

ASULFATE 1.123996 0.130372 8.621433 0

ANO3 0.608263 0.179314 3.392176 0.001

OCM 1.200113 0.122511 9.795972 0

LAC -2.85117 1.549325 -1.84026 0.069

SOIL 1.347808 0.080348 16.77468 0

SEASALT 0.311286 0.417169 0.746187 0.457

Valid cases: 105 

R-Squared: 0.943

San Rafael

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.6505 3.4099 11.6271 0.2537 24.1651 155

RECON 4.8157 3.0659 9.3996 0.4694 21.6231 155

ASULFATE 1.2397 0.8017 0.6427 0.1026 3.8565 155

ANO3 0.9014 0.7998 0.6397 0.0262 5.3482 155

OCM 1.5643 1.5321 2.3474 -0.0295 15.0289 155

LAC 0.1437 0.1001 0.01 -0.006 0.7106 155

SOIL 0.6868 0.8957 0.8023 0.01 8.2302 155

SEASALT 0.2798 0.3786 0.1433 0.0038 3.1185 155

San Rafael

Sulfate mass fraction 0.267

Nitrate mass fraction 0.194

OC mass fraction 0.336

LAC mass fraction 0.031

Soil mass fraction 0.148

Seasalt mass fraction 0.06

Missing mass fraction -0.036

San Rafael

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.40033 0.128052 -3.12633 0.002

ASULFATE 1.394333 0.099612 13.99762 0

ANO3 0.946203 0.085156 11.11141 0

OCM 1.390745 0.068482 20.30804 0

LAC -4.86609 1.163721 -4.1815 0

SOIL 0.958298 0.071605 13.3832 0

SEASALT 1.196843 0.16295 7.344852 0

Valid cases: 155 

R-Squared: 0.957

Appendix 1

66
DRAFT

Redwood National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.6238 4.5105 20.3449 0.1564 97.9345 1357

RECON 4.2949 4.1209 16.9814 0.3008 85.804 1357

ASULFATE 0.9607 0.6994 0.4892 0.0003 4.1059 1357

ANO3 0.3391 0.3081 0.0949 -0.016 2.5841 1357

OCM 1.6822 3.3264 11.0652 -0.2318 78.1628 1357

LAC 0.125 0.2 0.04 -0.0656 4.9942 1357

SOIL 0.159 0.2311 0.0534 0.0001 3.6387 1357

SEASALT 1.0288 1.1219 1.2588 0.0008 7.9472 1357

Redwood National Park

Sulfate mass fraction 0.208

Nitrate mass fraction 0.073

OC mass fraction 0.364

LAC mass fraction 0.027

Soil mass fraction 0.034

Seasalt mass fraction 0.223

Missing mass fraction 0.071

Redwood National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.199494 0.086051 2.318331 0.021

ASULFATE 1.226319 0.089256 13.73929 0

ANO3 1.594038 0.227238 7.014839 0

OCM 1.19724 0.029984 39.92989 0

LAC -3.6584 0.498302 -7.34172 0

SOIL 1.251564 0.21375 5.855268 0

SEASALT 0.923489 0.047667 19.37366 0

Valid cases: 1357 

R-Squared: 0.860

Cape Romain National Wildlife Refuge 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 9.0746 4.7137 22.2188 1.0638 31.8771 435

RECON 8.7759 4.3007 18.4964 1.7805 29.2242 435

ASULFATE 4.2149 2.6749 7.1551 0.3091 16.9786 435

ANO3 0.5302 0.3479 0.121 0.0804 2.7431 435

OCM 2.7866 1.8183 3.3063 0.3229 17.5909 435

LAC 0.3399 0.2466 0.0608 -0.0106 1.4579 435

SOIL 0.5275 1.1184 1.2509 0.0031 16.057 435

SEASALT 0.3767 0.7711 0.5946 0.0007 8.0487 435

Cape Romain National Wildlife Refuge 

Sulfate mass fraction 0.464

Nitrate mass fraction 0.058

OC mass fraction 0.307

LAC mass fraction 0.037

Soil mass fraction 0.058

Seasalt mass fraction 0.042

Missing mass fraction 0.033

Appendix 1

67
DRAFT

Cape Romain National Wildlife Refuge 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.29924 0.163171 1.833901 0.067

ASULFATE 1.193059 0.028296 42.16289 0

ANO3 0.413206 0.214275 1.928395 0.054

OCM 0.886806 0.064713 13.70368 0

LAC 0.230055 0.487737 0.471679 0.637

SOIL 1.201768 0.059259 20.28001 0

SEASALT 0.913861 0.092697 9.85856 0

Valid cases: 435 

R-Squared: 0.920

Rocky Mountain National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.0663 2.1563 4.6496 0.151 11.4997 575

RECON 3.1669 1.988 3.9522 0.3488 10.5855 575

ASULFATE 0.8352 0.5567 0.3099 0.0583 3.6572 575

ANO3 0.2569 0.3246 0.1054 -0.0295 2.552 575

OCM 1.2569 1.046 1.0941 -0.0985 8.4812 575

LAC 0.1298 0.0889 0.0079 -0.0064 0.5118 575

SOIL 0.6452 0.6695 0.4482 0.0032 6.8068 575

SEASALT 0.043 0.0771 0.0059 0.0002 0.6504 575

Rocky Mountain National Park

Sulfate mass fraction 0.272

Nitrate mass fraction 0.084

OC mass fraction 0.41

LAC mass fraction 0.042

Soil mass fraction 0.21

Seasalt mass fraction 0.014

Missing mass fraction -0.033

Rocky Mountain National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.23847 0.05116 -4.66113 0

ASULFATE 1.270784 0.060953 20.84869 0

ANO3 0.040859 0.093673 0.436186 0.663

OCM 0.948572 0.037572 25.24647 0

LAC 1.194781 0.449407 2.658571 0.008

SOIL 1.340102 0.039302 34.09798 0

SEASALT 0.486042 0.318364 1.526688 0.127

Valid cases: 575 

R-Squared: 0.927

Salt Creek

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.2607 5.6664 32.1077 0.9045 37.18 148

RECON 6.51 3.9851 15.8812 0.8466 22.0528 148

ASULFATE 1.6327 1.1162 1.2459 0.2183 8.6052 148

ANO3 0.9571 1.152 1.3271 0.06 8.4575 148

OCM 1.3021 0.8117 0.6588 0.2484 7.5816 148

LAC 0.1722 0.0942 0.0089 0.0212 0.4794 148

Appendix 1

68
DRAFT

SOIL 2.334 3.0077 9.046 0.0305 18.2439 148

SEASALT 0.112 0.1225 0.015 0.0002 0.6557 148

Salt Creek

Sulfate mass fraction 0.225

Nitrate mass fraction 0.132

OC mass fraction 0.179

LAC mass fraction 0.024

Soil mass fraction 0.321

Seasalt mass fraction 0.015

Missing mass fraction 0.103

Salt Creek

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.76567 0.243276 -3.14735 0.002

ASULFATE 1.299338 0.102542 12.67133 0

ANO3 0.972972 0.109998 8.845349 0

OCM 0.80555 0.152507 5.282037 0

LAC 0.015546 1.38279 0.011242 0.991

SOIL 1.546218 0.03593 43.03391 0

SEASALT 2.798255 0.783909 3.569617 0

Valid cases: 148 

R-Squared: 0.964

Sac and Fox

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 8.0162 4.694 22.0333 1.7067 22.1262 52

RECON 8.6527 4.6281 21.4191 2.1239 20.8781 52

ASULFATE 2.2163 1.6747 2.8047 0.418 6.7105 52

ANO3 3.0343 2.7181 7.3882 0.1796 11.2037 52

OCM 2.3006 1.3665 1.8672 0.4979 5.9308 52

LAC 0.3112 0.1601 0.0256 0.0605 0.7587 52

SOIL 0.5917 0.4948 0.2449 0.0402 3.1267 52

SEASALT 0.1986 0.2877 0.0828 0.003 1.4822 52

Sac and Fox

Sulfate mass fraction 0.276

Nitrate mass fraction 0.379

OC mass fraction 0.287

LAC mass fraction 0.039

Soil mass fraction 0.074

Seasalt mass fraction 0.025

Missing mass fraction -0.079

Sac and Fox

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.45648 0.172572 -2.64517 0.011

ASULFATE 1.088372 0.054838 19.84696 0

ANO3 1.116444 0.039374 28.35493 0

OCM 0.716863 0.085997 8.335902 0

LAC 0.909421 0.780111 1.165758 0.25

SOIL 1.493532 0.210875 7.082557 0

Appendix 1

69
DRAFT

SEASALT -0.71985 0.297734 -2.41777 0.02

Valid cases: 52 RSquared: 0.989

San Gabriel

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.3199 2.776 7.7063 0.2334 11.7521 57

RECON 4.0376 3.1099 9.6715 0.5194 13.5645 57

ASULFATE 0.7742 0.5986 0.3584 0.0765 2.396 57

ANO3 1.4469 1.6929 2.8659 0.0355 8.1493 57

OCM 1.1004 0.8969 0.8044 0.1309 4.7511 57

LAC 0.1476 0.1056 0.0112 0.0178 0.4046 57

SOIL 0.4114 0.4692 0.2201 0.0095 2.524 57

SEASALT 0.157 0.1694 0.0287 0.0033 0.9852 57

San Gabriel

Sulfate mass fraction 0.233

Nitrate mass fraction 0.436

OC mass fraction 0.331

LAC mass fraction 0.044

Soil mass fraction 0.124

Seasalt mass fraction 0.047

Missing mass fraction -0.216

San Gabriel

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.44879 0.103035 -4.35566 0

ASULFATE 1.329945 0.161779 8.220747 0

ANO3 0.690872 0.049584 13.93333 0

OCM 0.726054 0.106978 6.786969 0

LAC 1.496645 1.04059 1.438266 0.157

SOIL 1.345537 0.129778 10.36798 0

SEASALT 1.056826 0.385877 2.738762 0.009

Valid cases: 57 RSquared: 0.983

San Gorgonio Wilderness 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.8201 5.808 33.7326 0.2095 37.4286 732

RECON 8.4948 6.2986 39.6728 0.4026 40.2458 732

ASULFATE 1.4142 1.1047 1.2204 0.0542 5.8629 732

ANO3 3.3612 3.3758 11.3958 0.0035 23.787 732

OCM 2.3978 1.9734 3.8944 -0.0477 15.7741 732

LAC 0.3669 0.2613 0.0683 -0.0123 1.8299 732

SOIL 0.839 0.9507 0.9039 0.0075 9.4119 732

SEASALT 0.1156 0.1493 0.0223 0.0002 1.2093 732

San Gorgonio Wilderness 

Sulfate mass fraction 0.181

Nitrate mass fraction 0.43

OC mass fraction 0.307

LAC mass fraction 0.047

Appendix 1

70
DRAFT

Soil mass fraction 0.107

Seasalt mass fraction 0.015

Missing mass fraction -0.086

San Gorgonio Wilderness 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.184507 0.118306 1.559576 0.119

ASULFATE 1.002273 0.09093 11.02246 0

ANO3 0.905591 0.027131 33.37826 0

OCM 0.705695 0.066591 10.59739 0

LAC 1.123864 0.480134 2.340729 0.02

SOIL 1.073891 0.066498 16.14929 0

SEASALT 1.459754 0.44732 3.263335 0.001

Valid cases: 732 

R-Squared: 0.924

Saguaro National Monument

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.8085 2.5965 6.7418 1.0614 21.9907 422

RECON 5.4068 2.2716 5.1603 1.4595 18.1973 422

ASULFATE 1.6385 0.863 0.7447 0.2412 5.3931 422

ANO3 0.4107 0.4559 0.2078 0.0364 4.274 422

OCM 1.4934 0.7734 0.5981 -0.0776 8.881 422

LAC 0.2664 0.1483 0.022 -0.0362 0.9609 422

SOIL 1.4926 1.4088 1.9848 0.0614 10.5795 422

SEASALT 0.1052 0.1387 0.0193 0.0008 1.4596 422

Saguaro National Monument

Sulfate mass fraction 0.282

Nitrate mass fraction 0.071

OC mass fraction 0.257

LAC mass fraction 0.046

Soil mass fraction 0.257

Seasalt mass fraction 0.018

Missing mass fraction 0.069

Saguaro National Monument

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.155814 0.14152 1.100998 0.272

ASULFATE 1.238986 0.063593 19.4831 0

ANO3 0.331449 0.119541 2.772693 0.006

OCM 0.866574 0.085323 10.15634 0

LAC 1.134573 0.423381 2.679795 0.008

SOIL 1.169984 0.036513 32.04313 0

SEASALT 1.367323 0.36054 3.792429 0

Valid cases: 422 

R-Squared: 0.859

Saint Marks

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.0207 3.5539 12.6301 2.018 17.6715 40

RECON 7.2431 3.7914 14.375 1.6621 20.2976 40

Appendix 1

71
DRAFT

ASULFATE 2.6296 1.4905 2.2216 0.6855 7.385 40

ANO3 0.448 0.2404 0.0578 0.0962 1.1791 40

OCM 2.794 2.6232 6.8814 0.4484 13.5439 40

LAC 0.3188 0.316 0.0998 0.0118 1.7464 40

SOIL 0.642 1.4286 2.041 0.0171 8.8201 40

SEASALT 0.4107 0.5383 0.2898 0.008 1.9761 40

Saint Marks

Sulfate mass fraction 0.375

Nitrate mass fraction 0.064

OC mass fraction 0.398

LAC mass fraction 0.045

Soil mass fraction 0.091

Seasalt mass fraction 0.059

Missing mass fraction -0.032

Saint Marks

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.02824 0.248851 -0.11347 0.91

ASULFATE 0.851758 0.077935 10.92907 0

ANO3 1.444408 0.511117 2.825984 0.008

OCM 0.796259 0.093391 8.526116 0

LAC 0.91132 0.785576 1.160066 0.254

SOIL 1.172191 0.072208 16.23359 0

SEASALT 2.177331 0.210158 10.36043 0

Valid cases: 40 RSquared: 0.975

San Pedro Parks

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.6765 1.7653 3.1163 0.0322 9.7483 84

RECON 2.7981 1.7225 2.9669 -0.1587 10.417 84

ASULFATE 0.8236 0.5278 0.2785 0.0006 3.2178 84

ANO3 0.1598 0.1108 0.0123 0.0084 0.5522 84

OCM 0.9596 0.7725 0.5968 -0.4536 5.3933 84

LAC 0.094 0.0573 0.0033 -0.0062 0.3247 84

SOIL 0.6843 0.8304 0.6896 0.012 4.3273 84

SEASALT 0.0768 0.1499 0.0225 0.001 1.2812 84

San Pedro Parks

Sulfate mass fraction 0.308

Nitrate mass fraction 0.06

OC mass fraction 0.359

LAC mass fraction 0.035

Soil mass fraction 0.256

Seasalt mass fraction 0.029

Missing mass fraction -0.045

San Pedro Parks

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.04267 0.081508 -0.52353 0.602

ASULFATE 1.188957 0.105409 11.2795 0

Appendix 1

72
DRAFT

ANO3 0.609683 0.377908 1.613313 0.111

OCM 0.667032 0.095086 7.015069 0

LAC 1.762627 1.0493 1.679811 0.097

SOIL 1.255557 0.051847 24.21656 0

SEASALT -0.29316 0.246192 -1.19079 0.237

Valid cases: 84 RSquared: 0.971

Saguaro West

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.5076 4.6335 21.4696 1.8802 39.4557 115

RECON 7.1181 3.683 13.5645 1.9637 29.1705 115

ASULFATE 1.4273 0.7029 0.4941 0.3008 3.6118 115

ANO3 0.3902 0.2827 0.0799 0.1014 2.4475 115

OCM 1.5598 1.2624 1.5937 0.4536 12.739 115

LAC 0.2388 0.1432 0.0205 0.0342 1.2109 115

SOIL 3.3614 2.87 8.2367 0.3036 24.8699 115

SEASALT 0.1406 0.1915 0.0367 0.0002 1.454 115

Saguaro West

Sulfate mass fraction 0.19

Nitrate mass fraction 0.052

OC mass fraction 0.208

LAC mass fraction 0.032

Soil mass fraction 0.448

Seasalt mass fraction 0.019

Missing mass fraction 0.052

Saguaro West

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.19455 0.324418 -0.59969 0.55

ASULFATE 1.301404 0.151687 8.579561 0

ANO3 0.645773 0.425523 1.517598 0.132

OCM 1.370205 0.132102 10.37234 0

LAC -3.51925 1.108552 -3.17464 0.002

SOIL 1.286488 0.036361 35.38058 0

SEASALT -0.20502 0.565514 -0.36254 0.718

Valid cases: 115 

R-Squared: 0.949

Sawtooth National Forest

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.5821 2.006 4.0238 0.2815 12.3984 138

RECON 3.0903 2.1793 4.7493 0.6419 12.5809 138

ASULFATE 0.371 0.2335 0.0545 0.013 1.009 138

ANO3 0.0752 0.0502 0.0025 -0.0152 0.2866 138

OCM 2.0893 1.777 3.1577 0.3553 10.5253 138

LAC 0.1643 0.1351 0.0183 0.0152 0.8922 138

SOIL 0.3174 0.4395 0.1932 0.0067 2.4679 138

SEASALT 0.0731 0.1322 0.0175 0.0002 1.3531 138

Sawtooth National Forest

Appendix 1

73
DRAFT

Sulfate mass fraction 0.144

Nitrate mass fraction 0.029

OC mass fraction 0.809

LAC mass fraction 0.064

Soil mass fraction 0.123

Seasalt mass fraction 0.028

Missing mass fraction -0.197

Sawtooth National Forest

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.32273 0.099157 -3.25478 0.001

ASULFATE 2.000938 0.221178 9.046719 0

ANO3 0.548794 1.006348 0.545332 0.586

OCM 0.932066 0.047016 19.82453 0

LAC -0.82119 0.591381 -1.3886 0.167

SOIL 0.991818 0.117621 8.43231 0

SEASALT -0.08248 0.329795 -0.25009 0.803

Valid cases: 138 RSquared: 0.940

Seney

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.3327 1.4394 2.0718 0.544 8.4741 106

RECON 2.7134 1.6993 2.8876 0.5694 9.5343 106

ASULFATE 1.0365 0.5847 0.3419 0.157 3.6887 106

ANO3 0.2834 0.4808 0.2311 0.0101 4.0454 106

OCM 1.0487 0.9899 0.98 0.0301 6.3337 106

LAC 0.1034 0.0745 0.0055 0 0.3816 106

SOIL 0.142 0.1217 0.0148 0.0079 0.7893 106

SEASALT 0.0994 0.1376 0.0189 0.0003 1.2364 106

Seney

Sulfate mass fraction 0.444

Nitrate mass fraction 0.121

OC mass fraction 0.45

LAC mass fraction 0.044

Soil mass fraction 0.061

Seasalt mass fraction 0.043

Missing mass fraction -0.163

Seney

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.06465 0.06564 -0.98491 0.327

ASULFATE 1.038518 0.064054 16.21317 0

ANO3 0.687454 0.078693 8.735901 0

OCM 0.663974 0.051659 12.85296 0

LAC 2.580178 0.82003 3.146445 0.002

SOIL 0.38422 0.287694 1.335518 0.185

SEASALT 1.090483 0.209798 5.19777 0

Valid cases: 106 RSquared: 0.962

Appendix 1

74
DRAFT

Sequoia National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 9.1225 8.456 71.5034 0.3401 48.6711 421

RECON 9.7689 8.6076 74.0912 0.7477 61.6901 421

ASULFATE 1.4575 1.2349 1.5251 0.0066 9.0892 421

ANO3 2.1565 3.5491 12.5959 -0.0008 22.0511 421

OCM 4.0017 4.2109 17.7314 0.3179 51.9237 421

LAC 0.4138 0.3148 0.0991 0.0129 2.6999 421

SOIL 1.6545 3.9136 15.3159 0.0107 35.0026 421

SEASALT 0.0849 0.1743 0.0304 0.0002 1.6235 421

Sequoia National Park

Sulfate mass fraction 0.16

Nitrate mass fraction 0.236

OC mass fraction 0.439

LAC mass fraction 0.045

Soil mass fraction 0.181

Seasalt mass fraction 0.009

Missing mass fraction -0.071

Sequoia National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.52819 0.165722 -3.18717 0.002

ASULFATE 1.294019 0.090369 14.31924 0

ANO3 0.906527 0.027689 32.7398 0

OCM 0.748178 0.042244 17.7108 0

LAC 2.92693 0.590991 4.952584 0

SOIL 0.983461 0.02672 36.80663 0

SEASALT -0.26464 0.515526 -0.51335 0.608

Valid cases: 421 

R-Squared: 0.955

Shenandoah National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 11.1029 8.228 67.6996 0.0596 47.678 683

RECON 11.0561 7.4346 55.2732 0.1128 41.7727 683

ASULFATE 6.5213 5.7525 33.0916 0.0308 35.3237 683

ANO3 0.7603 0.7575 0.5738 -0.0231 6.5727 683

OCM 2.9277 2.0139 4.0558 -0.1415 11.7767 683

LAC 0.37 0.199 0.0396 0.0122 1.8628 683

SOIL 0.4155 0.3757 0.1412 0.0016 4.3993 683

SEASALT 0.0613 0.0966 0.0093 0.0002 1.4419 683

Shenandoah National Park

Sulfate mass fraction 0.587

Nitrate mass fraction 0.068

OC mass fraction 0.264

LAC mass fraction 0.033

Soil mass fraction 0.037

Seasalt mass fraction 0.006

Missing mass fraction 0.004

Appendix 1

75
DRAFT

Shenandoah National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.356175 0.149406 2.383936 0.017

ASULFATE 1.10822 0.014337 77.29657 0

ANO3 0.222714 0.082624 2.695517 0.007

OCM 1.095622 0.053865 20.34 0

LAC -0.4678 0.452414 -1.03402 0.301

SOIL 0.873141 0.175839 4.965567 0

SEASALT -0.7666 0.618086 -1.24028 0.215

Valid cases: 683 

R-Squared: 0.965

Shining Rock Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 8.8735 7.9942 63.907 0.0934 45.6308 249

RECON 8.0885 7.0726 50.0211 0.2839 49.0626 249

ASULFATE 4.7885 4.9762 24.7625 0.005 27.1382 249

ANO3 0.2621 0.2259 0.051 -0.0124 1.7825 249

OCM 2.1985 1.9901 3.9607 0.0988 18.662 249

LAC 0.2462 0.1692 0.0286 -0.0093 1.7649 249

SOIL 0.5484 0.9018 0.8132 0.0007 9.0051 249

SEASALT 0.0447 0.1019 0.0104 0.0003 1.0101

Shining Rock Wilderness

Sulfate mass fraction 0.54

Nitrate mass fraction 0.03

OC mass fraction 0.248

LAC mass fraction 0.028

Soil mass fraction 0.062

Seasalt mass fraction 0.005

Missing mass fraction 0.088

Shining Rock Wilderness

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.625252 0.20117 3.108087 0.002

ASULFATE 1.295556 0.031748 40.80705 0

ANO3 0.402757 0.651069 0.618609 0.537

OCM 0.9187 0.118814 7.732279 0

LAC -3.05537 1.313792 -2.32561 0.021

SOIL 1.020646 0.126877 8.044368 0

SEASALT 2.496104 1.058185 2.358854 0.019

Valid cases: 249 

R-Squared: 0.961

Sierra Ancha

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.8433 2.5106 6.3031 0.5067 21.6751 145

RECON 4.2299 2.4117 5.8163 1.193 21.1234 145

ASULFATE 0.8895 0.4896 0.2398 0.0453 2.8188 145

ANO3 0.2609 0.2182 0.0476 0.0293 1.8181 145

OCM 1.7781 1.3545 1.8346 0.3265 13.4136 145

LAC 0.1774 0.153 0.0234 0 1.5726 145

Appendix 1

76
DRAFT

SOIL 1.0474 0.9835 0.9674 0.0414 5.9301 145

SEASALT 0.0765 0.0695 0.0048 0.0002 0.3649 145

Sierra Ancha

Sulfate mass fraction 0.231

Nitrate mass fraction 0.068

OC mass fraction 0.463

LAC mass fraction 0.046

Soil mass fraction 0.273

Seasalt mass fraction 0.02

Missing mass fraction -0.101

Sierra Ancha

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.59359 0.115434 -5.14226 0

ASULFATE 1.25828 0.102305 12.29933 0

ANO3 0.696769 0.272684 2.555227 0.012

OCM 0.78858 0.061488 12.82485 0

LAC 2.797911 0.507605 5.511981 0

SOIL 1.143064 0.0564 20.26725 0

SEASALT 0.521002 0.660615 0.788662 0.432

Valid cases: 145 

R-Squared: 0.958

Sikes

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.9985 4.02 16.1605 2.1044 19.0828 31

RECON 6.5534 3.7729 14.2351 2.405 17.3548 31

ASULFATE 2.0827 1.8278 3.341 0.4304 8.6219 31

ANO3 0.5304 0.7895 0.6234 0.0935 4.2873 31

OCM 2.815 1.0215 1.0434 1.3025 5.8055 31

LAC 0.2739 0.1329 0.0177 0.0835 0.7782 31

SOIL 0.6903 1.3581 1.8444 0.0528 6.0037 31

SEASALT 0.1611 0.2028 0.0411 0.0058 1.0005 31

Sikes

Sulfate mass fraction 0.347

Nitrate mass fraction 0.088

OC mass fraction 0.469

LAC mass fraction 0.046

Soil mass fraction 0.115

Seasalt mass fraction 0.027

Missing mass fraction -0.093

Sikes

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.5246 0.374714 -1.39999 0.174

ASULFATE 1.204996 0.128002 9.413848 0

ANO3 0.520556 0.278459 1.869418 0.074

OCM 1.097795 0.149849 7.325985 0

LAC -1.44097 1.921954 -0.74974 0.461

SOIL 1.251069 0.123028 10.16899 0

Appendix 1

77
DRAFT

SEASALT 1.105428 0.723789 1.527279 0.14

Valid cases: 31 RSquared: 0.982

Simeonof

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.3369 2.456 6.0318 0.3603 17.5511 231

RECON 3.035 2.2818 5.2067 0.3385 14.5795 231

ASULFATE 0.8525 0.5967 0.356 0.0014 3.8516 231

ANO3 0.1029 0.0752 0.0057 -0.0273 0.4662 231

OCM 0.66 1.3461 1.8119 -0.283 10.3729 231

LAC 0.0906 0.1535 0.0236 -0.0114 1.2219 231

SOIL 0.151 0.4169 0.1738 0.0035 4.9937 231

SEASALT 1.1779 1.2902 1.6646 0.0133 7.8588 231

Simeonof

Sulfate mass fraction 0.255

Nitrate mass fraction 0.031

OC mass fraction 0.198

LAC mass fraction 0.027

Soil mass fraction 0.045

Seasalt mass fraction 0.353

Missing mass fraction 0.09

Simeonof

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.09459 0.071169 -1.3291 0.185

ASULFATE 1.431754 0.091844 15.58892 0

ANO3 1.650072 0.74003 2.229737 0.027

OCM 0.71019 0.035935 19.76297 0

LAC 0.018031 0.311754 0.057838 0.954

SOIL 1.321855 0.0907 14.57388 0

SEASALT 1.164068 0.03023 38.50711 0

Valid cases: 231 

R-Squared: 0.950

Sipsy Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 13.3664 6.9582 48.4168 1.1834 42.4342 298

RECON 13.3466 6.6769 44.5813 2.8598 41.7308 298

ASULFATE 7.028 4.9405 24.409 0.5566 31.3408 298

ANO3 0.9047 0.9182 0.8432 0.1085 5.3596 298

OCM 4.0173 2.1266 4.5223 0.4372 12.2362 298

LAC 0.5849 0.2998 0.0899 0.0591 1.642 298

SOIL 0.7389 2.0154 4.0617 0.0478 32.2517 298

SEASALT 0.0728 0.1445 0.0209 0.0007 1.3851 298

Sipsy Wilderness

Sulfate mass fraction 0.526

Nitrate mass fraction 0.068

OC mass fraction 0.301

LAC mass fraction 0.044

Appendix 1

78
DRAFT

Soil mass fraction 0.055

Seasalt mass fraction 0.005

Missing mass fraction 0.001

Sipsy Wilderness

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 1.345457 0.351351 3.829381 0

ASULFATE 1.003026 0.031006 32.34983 0

ANO3 0.194107 0.145817 1.331174 0.184

OCM 0.991277 0.090436 10.96104 0

LAC -0.00111 0.607856 -0.00182 0.999

SOIL 1.052149 0.066373 15.85207 0

SEASALT 0.507191 0.922706 0.549678 0.583

Valid cases: 298 

R-Squared: 0.898

Snoqualmie Pass; Snoqualmie National Forest

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.9218 2.514 6.3204 0.0301 24.3554 430

RECON 3.1073 2.5626 6.5668 0.1978 21.6016 430

ASULFATE 0.7988 0.5981 0.3577 0.0044 3.2057 430

ANO3 0.3479 0.5383 0.2898 -0.0147 7.2485 430

OCM 1.3708 1.4887 2.2163 -0.0144 9.7664 430

LAC 0.2174 0.1647 0.0271 -0.0091 1.0379 430

SOIL 0.2299 0.7408 0.5488 0.0023 14.0829 430

SEASALT 0.1425 0.272 0.074 0.0002 3.2299 430

Snoqualmie Pass; Snoqualmie National Forest

Sulfate mass fraction 0.273

Nitrate mass fraction 0.119

OC mass fraction 0.469

LAC mass fraction 0.074

Soil mass fraction 0.079

Seasalt mass fraction 0.049

Missing mass fraction -0.064

Snoqualmie Pass; Snoqualmie National Forest

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.08713 0.052598 -1.65649 0.098

ASULFATE 1.327741 0.048664 27.28364 0

ANO3 0.640105 0.056633 11.30271 0

OCM 0.952139 0.030339 31.38364 0

LAC -0.16645 0.274493 -0.60637 0.545

SOIL 1.225762 0.036137 33.91982 0

SEASALT 1.226056 0.096326 12.7282 0

Valid cases: 430 

R-Squared: 0.956

Spokane Reservation

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 9.2957 8.4769 71.8574 1.443 51.6106 83

Appendix 1

79
DRAFT

RECON 9.5565 7.0853 50.2009 1.6321 38.0222 83

ASULFATE 0.7442 0.4769 0.2275 0.1575 2.4086 83

ANO3 0.5723 0.745 0.5551 0.0497 3.6651 83

OCM 5.3636 5.0314 25.3147 0.5326 26.9212 83

LAC 0.3853 0.2887 0.0833 0.0174 1.4707 83

SOIL 2.3656 3.61 13.0322 0.0136 21.4072 83

SEASALT 0.1256 0.1179 0.0139 0.0005 0.6557 83

Spokane Reservation

Sulfate mass fraction 0.08

Nitrate mass fraction 0.062

OC mass fraction 0.577

LAC mass fraction 0.041

Soil mass fraction 0.254

Seasalt mass fraction 0.014

Missing mass fraction -0.028

Spokane Reservation

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -1.61363 0.410377 -3.93206 0

ASULFATE 0.519554 0.418427 1.241683 0.218

ANO3 0.980759 0.289022 3.393369 0.001

OCM 0.802563 0.073476 10.92287 0

LAC 3.674623 1.345967 2.7301 0.008

SOIL 1.696732 0.058857 28.82813 0

SEASALT 1.810552 1.486342 1.218126 0.227

Valid cases: 83 RSquared: 0.968

Starkey

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.0539 4.3761 19.1505 0.1143 27.8325 156

RECON 4.6414 5.4568 29.7764 0.3581 50.1233 156

ASULFATE 0.5017 0.3484 0.1214 0.014 1.6097 156

ANO3 0.2245 0.2604 0.0678 -0.0021 1.5385 156

OCM 2.9657 4.7311 22.3834 -0.5929 46.303 156

LAC 0.2292 0.287 0.0824 0 2.1981 156

SOIL 0.56 1.1196 1.2535 0.0019 10.0702 156

SEASALT 0.1603 0.2805 0.0787 0.0002 1.3745 156

Starkey

Sulfate mass fraction 0.124

Nitrate mass fraction 0.055

OC mass fraction 0.732

LAC mass fraction 0.057

Soil mass fraction 0.138

Seasalt mass fraction 0.04

Missing mass fraction -0.145

Starkey

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.00592 0.137909 -0.04292 0.966

Appendix 1

80
DRAFT

ASULFATE 1.60618 0.232841 6.898175 0

ANO3 0.781474 0.314084 2.488103 0.014

OCM 0.616103 0.033827 18.21358 0

LAC 1.395851 0.546948 2.552073 0.012

SOIL 1.695594 0.070851 23.93194 0

SEASALT -0.11272 0.2573 -0.4381 0.662

Valid cases: 156 

R-Squared: 0.961

Sula (Selway Bitteroot Wilderness)

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.5699 3.7589 14.1292 -0.0609 30.9918 153

RECON 2.9881 4.3507 18.9285 0.2704 34.5871 153

ASULFATE 0.4364 0.3055 0.0933 0.0312 1.653 153

ANO3 0.1249 0.123 0.0151 -0.0597 1.104 153

OCM 1.8363 3.8394 14.7408 0.0223 31.3709 153

LAC 0.1281 0.1679 0.0282 0 1.2441 153

SOIL 0.3693 0.5018 0.2518 0.0061 3.6822 153

SEASALT 0.093 0.208 0.0433 0.0002 1.4175 153

Sula (Selway Bitteroot Wilderness)

Sulfate mass fraction 0.17

Nitrate mass fraction 0.049

OC mass fraction 0.715

LAC mass fraction 0.05

Soil mass fraction 0.144

Seasalt mass fraction 0.036

Missing mass fraction -0.163

Sula (Selway Bitteroot Wilderness)

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.05574 0.062334 -0.89415 0.373

ASULFATE 1.334522 0.131195 10.17204 0

ANO3 0.488861 0.289913 1.686234 0.094

OCM 0.895971 0.023193 38.63118 0

LAC -0.60992 0.539002 -1.13156 0.26

SOIL 1.162334 0.074904 15.51775 0

SEASALT -0.15338 0.1559 -0.98384 0.327

Valid cases: 153 

R-Squared: 0.990

Swanquarter

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.4194 2.8138 7.9175 0.5459 14.5894 90

RECON 4.6112 2.7071 7.3286 0.8522 16.2746 90

ASULFATE 2.0332 1.4149 2.002 0.1829 7.3274 90

ANO3 0.4327 0.3046 0.0928 0.0476 1.6169 90

OCM 1.2229 1.2305 1.514 0.1321 9.9189 90

LAC 0.1186 0.1075 0.0116 0 0.5102 90

SOIL 0.2827 0.5629 0.3169 0.0021 4.3959 90

SEASALT 0.5211 0.6392 0.4086 0.0002 3.3887 90

Appendix 1

81
DRAFT

Swanquarter

Sulfate mass fraction 0.46

Nitrate mass fraction 0.098

OC mass fraction 0.277

LAC mass fraction 0.027

Soil mass fraction 0.064

Seasalt mass fraction 0.118

Missing mass fraction -0.043

Swanquarter

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.16426 0.136754 -1.2011 0.233

ASULFATE 1.332462 0.063643 20.93664 0

ANO3 -0.07592 0.318132 -0.23866 0.812

OCM 0.938041 0.087717 10.6939 0

LAC -2.03489 1.058838 -1.92181 0.058

SOIL 1.465983 0.120881 12.12744 0

SEASALT 1.126667 0.114833 9.811343 0

Valid cases: 90 RSquared: 0.955

Sycamore Canyon

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 6.4159 5.1192 26.2059 0.5762 26.2963 192

RECON 6.5198 5.0018 25.0177 1.1415 25.7697 192

ASULFATE 0.8211 0.4739 0.2246 0.07 2.6069 192

ANO3 0.2311 0.146 0.0213 -0.0154 0.7744 192

OCM 1.9751 1.6749 2.8052 0.2396 14.2124 192

LAC 0.2566 0.1839 0.0338 0.0057 1.2267 192

SOIL 3.1546 3.9932 15.9454 0.0171 19.8973 192

SEASALT 0.0811 0.1477 0.0218 0.0005 1.1856 192

Sycamore Canyon

Sulfate 0.128

Nitrate 0.036

OC 0.308

LAC 0.04

Soil 0.492

seasalt 0.013

Missing -0.016

Sycamore Canyon

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.03194 0.177929 -0.17952 0.858

ASULFATE 1.321276 0.156253 8.456024 0

ANO3 2.202583 0.52361 4.206529 0

OCM 0.886456 0.068037 13.02898 0

LAC -0.47024 0.577386 -0.81442 0.416

SOIL 1.031069 0.018966 54.36498 0

SEASALT -0.35715 0.46574 -0.76685 0.444

Appendix 1

82
DRAFT

Valid cases: 192 

R-Squared: 0.970

Tallgrass

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.5344 10.5196 110.6622 1.4141 59.1441 30

RECON 8.6948 14.6919 215.853 1.9867 83.9241 30

ASULFATE 1.8513 1.6042 2.5733 0.356 5.9267 30

ANO3 1.5445 2.3988 5.7541 0.0543 11.7193 30

OCM 4.2783 11.994 143.8567 0.5879 67.226 30

LAC 0.2839 0.3664 0.1343 0.0656 2.0895 30

SOIL 0.654 0.6076 0.3691 0.1044 3.2284 30

SEASALT 0.0828 0.0693 0.0048 0.0027 0.2342 30

Tallgrass

Sulfate mass fraction 0.246

Nitrate mass fraction 0.205

OC mass fraction 0.568

LAC mass fraction 0.038

Soil mass fraction 0.087

Seasalt mass fraction 0.011

Missing mass fraction -0.154

Tallgrass

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.6076 0.312936 -1.94162 0.065

ASULFATE 1.225154 0.097655 12.54574 0

ANO3 0.869152 0.087142 9.973944 0

OCM 0.631942 0.044707 14.13534 0

LAC 1.501191 1.585021 0.947111 0.353

SOIL 1.820449 0.247934 7.342473 0

SEASALT 2.549048 1.794259 1.420669 0.169

Valid cases: 30 RSquared: 0.997

Thunder Basin

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.2655 4.0578 16.4658 0.4688 24.1477 55

RECON 4.57 4.2823 18.3382 0.9237 26.3191 55

ASULFATE 0.8263 0.5784 0.3345 0.1974 3.4174 55

ANO3 0.2431 0.2547 0.0649 0.0307 1.1749 55

OCM 2.3419 3.5186 12.3806 0.4081 22.0945 55

LAC 0.1822 0.1885 0.0355 0.011 1.1666 55

SOIL 0.8774 0.5757 0.3314 0.1019 2.6195 55

SEASALT 0.0991 0.1042 0.0109 0.0018 0.5614 55

Thunder Basin

Sulfate mass fraction 0.194

Nitrate mass fraction 0.057

OC mass fraction 0.549

LAC mass fraction 0.043

Soil mass fraction 0.206

Appendix 1

83
DRAFT

Seasalt mass fraction 0.023

Missing mass fraction -0.071

Thunder Basin

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.20617 0.106027 -1.94448 0.058

ASULFATE 1.152924 0.084683 13.61456 0

ANO3 0.554904 0.199633 2.779622 0.008

OCM 0.931346 0.041677 22.34695 0

LAC 0.79026 0.755664 1.045782 0.301

SOIL 1.28687 0.083769 15.36212 0

SEASALT -0.70693 0.509001 -1.38885 0.171

Valid cases: 55 RSquared: 0.995

Theodore Roosevelt 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.7719 2.7984 7.8309 0.6546 20.2216 135

RECON 4.0241 2.6911 7.2421 0.8628 20.7166 135

ASULFATE 1.0979 0.7276 0.5294 0.1945 3.8106 135

ANO3 0.5399 0.5785 0.3347 0.0267 2.6707 135

OCM 1.4125 1.9429 3.775 0.0815 15.1033 135

LAC 0.1638 0.1125 0.0126 0.0232 0.6978 135

SOIL 0.7132 0.722 0.5213 0.0856 3.9321 135

SEASALT 0.0967 0.1607 0.0258 0.0005 1.1818 135

Theodore Roosevelt 

Sulfate mass fraction 0.291

Nitrate mass fraction 0.143

OC mass fraction 0.374

LAC mass fraction 0.043

Soil mass fraction 0.189

Seasalt mass fraction 0.026

Missing mass fraction -0.067

Theodore Roosevelt 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.30711 0.096449 -3.18422 0.002

ASULFATE 1.162741 0.057116 20.35756 0

ANO3 0.781271 0.073746 10.59414 0

OCM 0.990151 0.03752 26.39017 0

LAC 1.179409 0.639467 1.844362 0.067

SOIL 1.081174 0.059252 18.24697 0

SEASALT 0.182999 0.235942 0.775607 0.439

Valid cases: 135 

R-Squared: 0.977

Three Sisters Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.9632 3.1323 9.8113 0.0302 24.1844 544

RECON 3.0432 3.6129 13.0529 -0.0341 43.1361 544

ASULFATE 0.5894 0.5183 0.2686 0.003 2.9884 544

Appendix 1

84
DRAFT

ANO3 0.1522 0.1843 0.034 -0.0508 1.6525 544

OCM 1.7761 2.8972 8.3936 -0.1193 39.4045 544

LAC 0.1569 0.1886 0.0356 -0.0155 2.2532 544

SOIL 0.249 0.3474 0.1207 0.0007 2.7172 544

SEASALT 0.1196 0.1875 0.0352 0.0002 1.5529 544

Three Sisters Wilderness

Sulfate mass fraction 0.199

Nitrate mass fraction 0.051

OC mass fraction 0.599

LAC mass fraction 0.053

Soil mass fraction 0.084

Seasalt mass fraction 0.04

Missing mass fraction -0.027

Three Sisters Wilderness

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.089557 0.060112 1.489842 0.137

ASULFATE 1.750836 0.095577 18.31858 0

ANO3 0.575143 0.246738 2.33099 0.02

OCM 0.712139 0.029091 24.47943 0

LAC 0.280895 0.482392 0.582296 0.561

SOIL 1.522476 0.126442 12.04094 0

SEASALT 0.552959 0.189146 2.923457 0.004

Valid cases: 544 

R-Squared: 0.937

Tonto National Monument

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.9667 2.5572 6.5394 0.5573 31.5773 806

RECON 4.8151 2.1791 4.7484 0.7298 21.7655 806

ASULFATE 1.4018 0.7302 0.5332 0.0017 4.7035 806

ANO3 0.3311 0.3141 0.0986 -0.0471 3.8388 806

OCM 1.7209 1.1838 1.4015 -0.3636 13.3889 806

LAC 0.2306 0.1456 0.0212 -0.0119 1.4657 806

SOIL 1.0577 0.9536 0.9094 0.0268 9.5987 806

SEASALT 0.0731 0.0964 0.0093 0.0003 0.7116 806

Tonto National Monument

Sulfate mass fraction 0.282

Nitrate mass fraction 0.067

OC mass fraction 0.346

LAC mass fraction 0.046

Soil mass fraction 0.213

Seasalt mass fraction 0.015

Missing mass fraction 0.031

Tonto National Monument

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.07335 0.109501 -0.66989 0.503

ASULFATE 1.172094 0.056432 20.77007 0

ANO3 0.671666 0.130729 5.137843 0

Appendix 1

85
DRAFT

OCM 1.065746 0.051619 20.64624 0

LAC 0.498588 0.415832 1.199015 0.231

SOIL 1.089646 0.046233 23.56834 0

SEASALT 1.000668 0.435895 2.295661 0.022

Valid cases: 806 

R-Squared: 0.811

Trapper Creek

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 1.2254 1.0714 1.1479 0.155 6.488 125

RECON 1.1993 1.0893 1.1865 0.0032 5.55 125

ASULFATE 0.301 0.2612 0.0682 0.0202 1.3465 125

ANO3 0.0697 0.1691 0.0286 -0.0366 1.8115 125

OCM 0.5513 0.747 0.558 -0.153 4.4276 125

LAC 0.0565 0.0561 0.0032 0 0.3532 125

SOIL 0.1114 0.2072 0.0429 0.0022 1.6724 125

SEASALT 0.1095 0.1801 0.0324 0.0005 1.3086 125

Trapper Creek

Sulfate mass fraction 0.246

Nitrate mass fraction 0.057

OC mass fraction 0.45

LAC mass fraction 0.046

Soil mass fraction 0.091

Seasalt mass fraction 0.089

Missing mass fraction 0.021

Trapper Creek

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.108388 0.038225 2.835554 0.005

ASULFATE 1.586444 0.100581 15.77282 0

ANO3 -0.10514 0.163802 -0.64186 0.522

OCM 1.06115 0.042719 24.84003 0

LAC -0.9216 0.538139 -1.71256 0.089

SOIL 0.624389 0.114004 5.476897 0

SEASALT 0.404475 0.14796 2.733683 0.007

Valid cases: 125 

R-Squared: 0.956

Trinity

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.8678 3.5761 12.7885 0.1246 35.3281 128

RECON 3.2627 4.9175 24.1818 0.2053 53.222 128

ASULFATE 0.4582 0.3473 0.1206 0.025 1.6633 128

ANO3 0.1487 0.1893 0.0359 -0.0356 1.4543 128

OCM 1.9772 4.4182 19.5207 -0.0167 48.4587 128

LAC 0.1502 0.238 0.0567 -0.0031 2.5411 128

SOIL 0.3874 0.5672 0.3217 0 3.1046 128

SEASALT 0.1411 0.2479 0.0614 0.0003 2.2915 128

Trinity

Sulfate mass fraction 0.16

Appendix 1

86
DRAFT

Nitrate mass fraction 0.052

OC mass fraction 0.689

LAC mass fraction 0.052

Soil mass fraction 0.135

Seasalt mass fraction 0.049

Missing mass fraction -0.138

Trinity

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.19892 0.104193 -1.90918 0.059

ASULFATE 2.082592 0.205822 10.11841 0

ANO3 0.746098 0.336336 2.218307 0.028

OCM 0.642026 0.05661 11.34123 0

LAC 0.940467 1.064645 0.883362 0.379

SOIL 1.152013 0.121981 9.444162 0

SEASALT 1.025274 0.226408 4.528426 0

Valid cases: 128 

R-Squared: 0.972

Tuxedni

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 1.9327 1.6348 2.6726 -0.0926 7.8557 156

RECON 2.0307 2.548 6.4925 0.1093 27.1346 156

ASULFATE 0.4949 0.4112 0.1691 0.0015 1.9268 156

ANO3 0.1137 0.2221 0.0493 -0.0172 2.6249 156

OCM 0.8308 2.2152 4.907 -0.2039 26.6225 156

LAC 0.0555 0.0725 0.0053 -0.0092 0.5093 156

SOIL 0.0882 0.106 0.0112 0.0021 0.9233 156

SEASALT 0.4476 0.8546 0.7303 0.0003 4.9428 156

Tuxedni

Sulfate mass fraction 0.256

Nitrate mass fraction 0.059

OC mass fraction 0.43

LAC mass fraction 0.029

Soil mass fraction 0.046

Seasalt mass fraction 0.232

Missing mass fraction -0.051

Tuxedni

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.217602 0.087087 2.49866 0.014

ASULFATE 2.196547 0.160982 13.64472 0

ANO3 -0.57982 0.234704 -2.47043 0.015

OCM 0.065359 0.024682 2.648001 0.009

LAC 3.088108 0.792955 3.894431 0

SOIL 0.001906 0.57076 0.003339 0.997

SEASALT 1.046058 0.063373 16.50624 0

Valid cases: 156 

R-Squared: 0.854

UL Bend

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87
DRAFT

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.3306 3.822 14.6078 0.1177 33.3249 151

RECON 3.4385 3.8939 15.1625 0.3321 34.1216 151

ASULFATE 0.8111 0.5729 0.3282 0.0382 3.1983 151

ANO3 0.2946 0.5671 0.3216 -0.0148 3.5221 151

OCM 1.6015 3.1234 9.7556 0.1136 28.2974 151

LAC 0.1283 0.1571 0.0247 0.003 1.1313 151

SOIL 0.5173 0.7286 0.5308 0.0108 5.4285 151

SEASALT 0.0856 0.0709 0.005 0.0003 0.3365 151

UL Bend

Sulfate mass fraction 0.244

Nitrate mass fraction 0.088

OC mass fraction 0.481

LAC mass fraction 0.039

Soil mass fraction 0.155

Seasalt mass fraction 0.026

Missing mass fraction -0.032

UL Bend

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.098531 0.105006 0.938339 0.35

ASULFATE 0.865686 0.098654 8.774952 0

ANO3 0.922863 0.091087 10.13169 0

OCM 0.96217 0.048327 19.90969 0

LAC 0.863263 0.957478 0.901601 0.369

SOIL 1.169033 0.077659 15.05352 0

SEASALT 0.017505 0.707369 0.024747 0.98

Valid cases: 151 

R-Squared: 0.978

Upper Buffalo Wilderness

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 10.1273 6.7926 46.1396 0.0594 60.6875 477

RECON 10.1428 6.3614 40.4668 0.1343 50.8738 477

ASULFATE 4.7072 4.4199 19.5354 0.001 42.9846 477

ANO3 1.0887 1.2496 1.5616 0.0026 9.2619 477

OCM 3.163 2.0144 4.058 -0.2684 15.9113 477

LAC 0.3306 0.1732 0.03 0.0029 1.1667 477

SOIL 0.7941 1.9114 3.6535 0.0018 29.2636 477

SEASALT 0.0592 0.1101 0.0121 0.0003 1.7711 477

Upper Buffalo Wilderness

Sulfate mass fraction 0.465

Nitrate mass fraction 0.108

OC mass fraction 0.312

LAC mass fraction 0.033

Soil mass fraction 0.078

Seasalt mass fraction 0.006

Missing mass fraction -0.002

Upper Buffalo Wilderness

Appendix 1

88
DRAFT

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.06511 0.128985 0.504791 0.614

ASULFATE 1.102363 0.014848 74.24316 0

ANO3 0.667318 0.044943 14.84813 0

OCM 1.07815 0.047605 22.64778 0

LAC -0.10568 0.517971 -0.20403 0.838

SOIL 0.881614 0.029157 30.23632 0

SEASALT 1.204726 0.483846 2.489897 0.013

Valid cases: 477 

R-Squared: 0.971

Virgin Islands National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 7.2406 5.3367 28.4803 0.785 35.8223 410

RECON 5.5839 4.287 18.3787 0.8718 25.6652 410

ASULFATE 1.1218 0.4595 0.2111 0.0072 3.6767 410

ANO3 0.2579 0.1992 0.0397 -0.016 1.6664 410

OCM 0.6605 0.6954 0.4836 -0.1658 5.1503 410

LAC 0.0796 0.1302 0.0169 -0.0101 1.5821 410

SOIL 2.4907 3.5299 12.4601 0.0294 20.2458 410

SEASALT 0.9735 0.9282 0.8615 0.0012 5.1857 410

Virgin Islands National Park

Sulfate mass fraction 0.155

Nitrate mass fraction 0.036

OC mass fraction 0.091

LAC mass fraction 0.011

Soil mass fraction 0.344

Seasalt mass fraction 0.134

Missing mass fraction 0.229

Virgin Islands National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 1.306972 0.216155 6.046469 0

ASULFATE 1.604573 0.180434 8.892841 0

ANO3 -0.96947 0.502614 -1.92885 0.054

OCM -0.40383 0.136722 -2.95365 0.003

LAC 2.442771 0.723024 3.378548 0.001

SOIL 1.343424 0.025175 53.36301 0

SEASALT 1.14023 0.094811 12.02633 0

Valid cases: 410 

R-Squared: 0.920

Viking Lake

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 10.6222 9.1691 84.0731 2.9161 69.7585 78

RECON 11.2003 10.3803 107.7507 3.0696 85.1605 78

ASULFATE 2.9802 3.0163 9.0978 0.3781 21.494 78

ANO3 3.9162 3.6053 12.9981 0.1478 18.122 78

OCM 3.0536 7.6224 58.1004 0.6439 68.5323 78

LAC 0.3952 0.4662 0.2174 0.0902 4.1478 78

SOIL 0.665 0.643 0.4135 0.0341 4.4131 78

Appendix 1

89
DRAFT

SEASALT 0.19 0.1746 0.0305 0.0023 0.8883 78

Viking Lake

Sulfate mass fraction 0.281

Nitrate mass fraction 0.369

OC mass fraction 0.287

LAC mass fraction 0.037

Soil mass fraction 0.063

Seasalt mass fraction 0.018

Missing mass fraction -0.054

Viking Lake

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.11073 0.288518 -0.3838 0.702

ASULFATE 1.07123 0.051882 20.64758 0

ANO3 1.017441 0.03571 28.49185 0

OCM 0.705781 0.064163 10.99981 0

LAC 2.478279 1.066711 2.323289 0.023

SOIL 0.655931 0.237283 2.764335 0.007

SEASALT -0.07853 0.705331 -0.11134 0.912

Valid cases: 78 RSquared: 0.989

Voyageurs National Park 2

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.4779 2.5584 6.5452 0.2551 18.286 170

RECON 3.8443 2.4969 6.2347 0.823 16.7987 170

ASULFATE 1.1999 0.6966 0.4853 0.19 3.9009 170

ANO3 0.8218 1.3639 1.8602 -0.016 9.0812 170

OCM 1.3461 0.9378 0.8795 0.1361 5.6079 170

LAC 0.1397 0.0881 0.0078 0.013 0.6184 170

SOIL 0.1792 0.1508 0.0227 0.0047 1.2168 170

SEASALT 0.1576 0.3639 0.1324 0.0003 4.0522 170

Voyageurs National Park 2

Sulfate mass fraction 0.345

Nitrate mass fraction 0.236

OC mass fraction 0.387

LAC mass fraction 0.04

Soil mass fraction 0.052

Seasalt mass fraction 0.045

Missing mass fraction -0.105

Voyageurs National Park 2

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.42415 0.074152 -5.71997 0

ASULFATE 1.218098 0.059015 20.64033 0

ANO3 1.008711 0.028595 35.27564 0

OCM 1.015741 0.061036 16.64171 0

LAC -0.27736 0.721466 -0.38444 0.701

SOIL 0.799352 0.271167 2.94782 0.004

Appendix 1

90
DRAFT

SEASALT 0.88669 0.090012 9.850755 0

Valid cases: 170 

R-Squared: 0.974

Washington DC

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 16.2858 7.9396 63.0372 3.1789 54.6316 857

RECON 16.4986 7.4845 56.0181 4.0349 43.7433 857

ASULFATE 6.6779 4.4098 19.4461 1.0461 31.6571 857

ANO3 2.3147 2.029 4.1167 0.1042 14.8928 857

OCM 5.1626 2.9186 8.518 1.1462 25.4176 857

LAC 1.3431 0.8056 0.649 0.2592 5.6298 857

SOIL 0.705 0.4501 0.2026 0.082 5.6682 857

SEASALT 0.2954 0.4046 0.1637 0.0007 3.2372 857

Washington DC

Sulfate mass fraction 0.41

Nitrate mass fraction 0.142

OC mass fraction 0.317

LAC mass fraction 0.082

Soil mass fraction 0.043

Seasalt mass fraction 0.018

Missing mass fraction -0.013

Washington DC

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.35445 0.186142 -1.90417 0.057

ASULFATE 1.157384 0.018333 63.13071 +DEN

ANO3 0.816699 0.04599 17.75822 0

OCM 0.944174 0.039454 23.93109 0

LAC 0.874064 0.129447 6.752311 0

SOIL 1.03628 0.185202 5.595391 0

SEASALT 0.819608 0.211605 3.873294 0

Valid cases: 857 

R-Squared: 0.927

Weminuche Wilderness 

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.7962 2.0318 4.1282 0.1781 30.6395 792

RECON 2.6977 1.7981 3.2333 0.1207 31.1107 792

ASULFATE 0.7783 0.4894 0.2395 0.0096 3.6218 792

ANO3 0.1185 0.1279 0.0164 -0.0275 2.3193 792

OCM 1.0333 1.0356 1.0725 0.0166 21.0474 792

LAC 0.1624 0.1004 0.0101 -0.0135 0.9433 792

SOIL 0.5571 0.7069 0.4998 0.0185 11.9192 792

SEASALT 0.0482 0.0901 0.0081 0.0002 1.8793 792

Weminuche Wilderness 

Sulfate mass fraction 0.278

Nitrate mass fraction 0.042

OC mass fraction 0.37

LAC mass fraction 0.058

Appendix 1

91
DRAFT

Soil mass fraction 0.199

Seasalt mass fraction 0.017

Missing mass fraction 0.035

Weminuche Wilderness 

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.11925 0.05486 -2.17375 0.03

ASULFATE 1.4128 0.052821 26.74676 0

ANO3 0.770307 0.25703 2.996955 0.003

OCM 0.933875 0.035844 26.05391 0

LAC 0.619303 0.322623 1.919589 0.055

SOIL 1.207548 0.039886 30.27516 0

SEASALT -0.28255 0.260045 -1.08654 0.278

Valid cases: 792 

R-Squared: 0.896

White Mountain

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.5852 3.7083 13.7512 0.6256 25.2001 100

RECON 4.2526 3.0761 9.4624 0.4821 18.9455 100

ASULFATE 1.3027 0.9785 0.9574 0.1542 6.2584 100

ANO3 0.3006 0.6835 0.4672 -0.0155 5.4165 100

OCM 1.1416 0.9538 0.9097 0.1188 8.7876 100

LAC 0.1034 0.0628 0.0039 0.012 0.4639 100

SOIL 1.3118 1.6907 2.8584 0.0493 9.3629 100

SEASALT 0.0924 0.0975 0.0095 0.0012 0.5252 100

White Mountain

Sulfate mass fraction 0.284

Nitrate mass fraction 0.066

OC mass fraction 0.249

LAC mass fraction 0.023

Soil mass fraction 0.286

Seasalt mass fraction 0.02

Missing mass fraction 0.073

White Mountain

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.075497 0.145802 0.517802 0.606

ASULFATE 1.231427 0.085249 14.44514 0

ANO3 1.035676 0.090972 11.3845 0

OCM 1.214695 0.119553 10.16029 0

LAC -5.45184 1.856503 -2.93662 0.004

SOIL 1.225955 0.057141 21.45507 0

SEASALT 1.764904 0.740142 2.384547 0.019

Valid cases: 100 

R-Squared: 0.976

White Pass

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 1.7344 2.0827 4.3378 -0.0978 16.8034 162

RECON 1.7927 2.2909 5.248 0.0008 19.1758 162

Appendix 1

92
DRAFT

ASULFATE 0.4165 0.3504 0.1228 0.0082 1.7656 162

ANO3 0.1315 0.2039 0.0416 -0.0006 1.7801 162

OCM 0.8166 1.6762 2.8095 -0.1845 15.9404 162

LAC 0.0756 0.1022 0.0105 -0.0036 0.8477 162

SOIL 0.2288 0.5195 0.2699 0 3.8276 162

SEASALT 0.1236 0.2145 0.046 0.0003 1.6364 162

White Pass

Sulfate mass fraction 0.24

Nitrate mass fraction 0.076

OC mass fraction 0.471

LAC mass fraction 0.044

Soil mass fraction 0.132

Seasalt mass fraction 0.071

Missing mass fraction -0.034

White Pass

Variable Estimate Std Error t-value Prob>|t|

CONSTANT 0.142594 0.04386 3.251122 0.001

ASULFATE 1.126263 0.108589 10.37183 0

ANO3 0.958504 0.172915 5.543215 0

OCM 0.871426 0.039802 21.89379 0

LAC 0.257526 0.676563 0.380639 0.704

SOIL 1.085751 0.05711 19.01159 0

SEASALT 0.138064 0.129842 1.063325 0.289

Valid cases: 162 

R-Squared: 0.975

Wheeler Peak

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.2849 2.159 4.6612 0.0325 18.8318 135

RECON 2.4129 2.285 5.2212 0.2535 21.4395 135

ASULFATE 0.5639 0.3603 0.1298 0.0877 2.0653 135

ANO3 0.1742 0.2097 0.044 0.0088 2.204 135

OCM 0.9412 1.5154 2.2965 0.0135 15.1562 135

LAC 0.1152 0.1881 0.0354 0.0046 1.4939 135

SOIL 0.5266 0.5545 0.3075 0.0231 2.7119 135

SEASALT 0.0918 0.1367 0.0187 0.0002 1.2621 135

Wheeler Peak

Sulfate mass fraction 0.247

Nitrate mass fraction 0.076

OC mass fraction 0.412

LAC mass fraction 0.05

Soil mass fraction 0.23

Seasalt mass fraction 0.04

Missing mass fraction -0.056

Wheeler Peak

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.04043 0.061501 -0.6573 0.512

ASULFATE 1.053948 0.090548 11.63969 0

Appendix 1

93
DRAFT

ANO3 0.186451 0.248593 0.750024 0.455

OCM 0.924449 0.040263 22.96038 0

LAC 0.865432 0.242565 3.567838 0.001

SOIL 1.310545 0.060638 21.61253 0

SEASALT 0.421012 0.218089 1.930461 0.056

Valid cases: 135 

R-Squared: 0.977

White River National Forest

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.3421 3.8486 14.8114 0.1197 43.7748 158

RECON 2.3601 3.7192 13.8326 0.1519 42.921 158

ASULFATE 0.5864 0.3569 0.1273 0.0631 2.2674 158

ANO3 0.1424 0.2519 0.0634 0.0086 3.0323 158

OCM 0.8881 1.9384 3.7574 -0.1633 22.4082 158

LAC 0.0934 0.1444 0.0209 -0.0056 1.7489 158

SOIL 0.5604 1.6083 2.5867 0.0066 14.7759 158

SEASALT 0.0894 0.0768 0.0059 0.0002 0.3758 158

White River National Forest

Sulfate mass fraction 0.25

Nitrate mass fraction 0.061

OC mass fraction 0.379

LAC mass fraction 0.04

Soil mass fraction 0.239

Seasalt mass fraction 0.038

Missing mass fraction -0.008

White River National Forest

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.17596 0.052349 -3.36132 0.001

ASULFATE 1.170451 0.069513 16.83796 0

ANO3 0.756582 0.246825 3.06525 0.003

OCM 0.909222 0.044833 20.28027 0

LAC 1.202368 0.653566 1.839704 0.068

SOIL 1.201276 0.025099 47.86068 0

SEASALT 1.465573 0.31026 4.723692 0

Valid cases: 158 

R-Squared: 0.994

Wind Cave

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.9824 2.8505 8.1253 0.5708 13.1313 96

RECON 3.1293 2.7435 7.5268 0.7742 13.158 96

ASULFATE 0.871 0.6688 0.4474 0.182 3.4846 96

ANO3 0.1828 0.2616 0.0684 -0.0055 2.3971 96

OCM 1.4264 2.0173 4.0696 0.2237 10.7188 96

LAC 0.1181 0.0934 0.0087 0.0267 0.6115 96

SOIL 0.4572 0.397 0.1576 0.0084 2.4775 96

SEASALT 0.0739 0.0825 0.0068 0.0015 0.4348 96

Wind Cave

Appendix 1

94
DRAFT

Sulfate mass fraction 0.292

Nitrate mass fraction 0.061

OC mass fraction 0.478

LAC mass fraction 0.04

Soil mass fraction 0.153

Seasalt mass fraction 0.025

Missing mass fraction -0.049

Wind Cave

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.14213 0.094049 -1.5112 0.134

ASULFATE 1.062716 0.082864 12.8248 0

ANO3 0.454765 0.169857 2.677341 0.009

OCM 1.02654 0.04696 21.8599 0

LAC 0.416407 1.015901 0.409889 0.683

SOIL 1.303616 0.136912 9.521562 0

SEASALT 0.086061 0.543675 0.158295 0.875

Valid cases: 96 RSquared: 0.980

Wichita Mountains

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 5.6145 3.8968 15.185 1.1135 17.4839 59

RECON 5.9803 3.8235 14.6191 1.3214 16.5905 59

ASULFATE 1.7297 1.2985 1.6861 0.2938 5.3766 59

ANO3 1.5681 2.1134 4.4665 0.0724 7.1634 59

OCM 1.7617 0.9509 0.9043 0.4241 4.887 59

LAC 0.229 0.1259 0.0158 0.0407 0.505 59

SOIL 0.6017 0.6099 0.372 0.0067 4.0149 59

SEASALT 0.0901 0.0959 0.0092 0.0005 0.6658 59

Wichita Mountains

Sulfate mass fraction 0.308

Nitrate mass fraction 0.279

OC mass fraction 0.314

LAC mass fraction 0.041

Soil mass fraction 0.107

Seasalt mass fraction 0.016

Missing mass fraction -0.065

Wichita Mountains

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.33165 0.136023 -2.43816 0.018

ASULFATE 1.098089 0.078607 13.96935 0

ANO3 0.972589 0.043913 22.14794 0

OCM 0.747461 0.124658 5.996108 0

LAC 1.973208 0.970746 2.032672 0.047

SOIL 1.48775 0.122727 12.12239 0

SEASALT -1.57833 0.674659 -2.33945 0.023

Valid cases: 59 RSquared: 0.988

Appendix 1

95
DRAFT

Yellowstone National Park 2

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 2.906 2.7063 7.3241 0.1536 17.7469 275

RECON 3.0483 2.564 6.5739 0.4273 18.2014 275

ASULFATE 0.5792 0.2939 0.0864 0.1046 1.754 275

ANO3 0.1834 0.1914 0.0366 0.0008 1.8924 275

OCM 1.5732 1.9449 3.7826 0.1197 14.0598 275

LAC 0.1191 0.1366 0.0187 0 1.0189 275

SOIL 0.5274 0.8501 0.7226 0.0068 7.7238 275

SEASALT 0.0661 0.0761 0.0058 0.0005 0.5531 275

Yellowstone National Park 2

Sulfate mass fraction 0.199

Nitrate mass fraction 0.063

OC mass fraction 0.541

LAC mass fraction 0.041

Soil mass fraction 0.181

Seasalt mass fraction 0.023

Missing mass fraction -0.049

Yellowstone National Park 2

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.16732 0.080387 -2.08149 0.038

ASULFATE 1.11889 0.129687 8.627597 0

ANO3 0.622842 0.182988 3.40373 0.001

OCM 0.855208 0.048304 17.70462 0

LAC 2.568531 0.694743 3.697097 0

SOIL 1.302639 0.042594 30.58285 0

SEASALT -0.41235 0.437621 -0.94225 0.347

Valid cases: 275 

R-Squared: 0.960

Yosemite National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 4.6415 3.8506 14.8272 0.2706 40.3325 825

RECON 4.7436 3.9305 15.4488 0.3216 42.5152 825

ASULFATE 0.9361 0.7182 0.5158 0.0227 5.5219 825

ANO3 0.4873 0.8496 0.7219 0.0035 15.5326 825

OCM 2.4824 2.7998 7.8387 -0.0806 37.1792 825

LAC 0.2349 0.2508 0.0629 -0.0033 2.7071 825

SOIL 0.539 0.6625 0.4389 0.002 9.5872 825

SEASALT 0.0638 0.1113 0.0124 0.0002 1.6072 825

Yosemite National Park

Sulfate mass fraction 0.202

Nitrate mass fraction 0.105

OC mass fraction 0.535

LAC mass fraction 0.051

Soil mass fraction 0.116

Seasalt mass fraction 0.014

Missing mass fraction -0.022

Appendix 1

96
DRAFT

Yosemite National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.01197 0.053648 -0.22309 0.824

ASULFATE 1.145358 0.050905 22.49976 0

ANO3 0.743991 0.037359 19.91453 0

OCM 0.932788 0.031309 29.79292 0

LAC 0.695342 0.354782 1.959913 0.05

SOIL 1.255509 0.0514 24.42614 0

SEASALT 0.987926 0.273447 3.612865 0

Valid cases: 825 

R-Squared: 0.952

Zion National Park

Variable Mean Std Dev Variance Minimum Maximum Valid

FM 3.7931 3.5422 12.5475 0.646 33.4441 116

RECON 3.5608 3.3802 11.4261 0.7548 33.857 116

ASULFATE 0.7929 0.4791 0.2296 0.1306 2.0873 116

ANO3 0.2937 0.3226 0.1041 0.0306 2.5576 116

OCM 1.1623 2.0099 4.0397 0.1431 21.2382 116

LAC 0.1717 0.1458 0.0213 0.0122 1.5219 116

SOIL 1.0787 1.1399 1.2993 0.0166 7.2872 116

SEASALT 0.0615 0.0608 0.0037 0.0002 0.3001 116

Zion National Park

Sulfate mass fraction 0.209

Nitrate mass fraction 0.077

OC mass fraction 0.306

LAC mass fraction 0.045

Soil mass fraction 0.284

Seasalt mass fraction 0.016

Missing mass fraction 0.061

Zion National Park

Variable Estimate Std Error t-value Prob>|t|

CONSTANT -0.24555 0.163557 -1.50129 0.136

ASULFATE 1.369143 0.135513 10.10341 0

ANO3 0.405559 0.230727 1.757743 0.082

OCM 0.839131 0.100962 8.311322 0

LAC 2.146992 1.288827 1.665849 0.099

SOIL 1.313887 0.068071 19.30159 0

SEASALT 1.182449 0.954405 1.238939 0.218

Valid cases: 116 

R-Squared: 0.973

Appendix 1

97