APPENDIX M: 

Utah Class I Area Monitoring Data Summary Tables and Charts 

Includes the following subsections: 

Subsection IMPROVE Monitor Class I Area(s) Represented 

M.1 BRCA1 Bryce Canyon NP 

M.2 CANY1 Canyonlands NP and Arches NP 

M.3 CAPI1 Capitol Reef NP 

M.4 ZICA1 Zion NP 

 
M.1. BRYCE CANYON NP (BRCA1) 

The following tables and figures are presented in this section for the Bryce Canyon NP 

represented by the BRCA1 IMPROVE Monitor: 

 

 Table M.1-1: Annual Averages, 5-Year Period Averages, and Trends: Table of 

averages and other metrics for the 20% least impaired days, the 20% most impaired 

days, and all sampled days is presented.

 Figure M.1-1: Annual and 5-Year Period Averages for the 20% Most Impaired 

Visibility Days: Line graphs depicting annual and period averages by component are 

presented.

 Figure M.1-2: Annual and 5-Year Period Averages for the 20% Least Impaired 

Visibility Days: Line graphs depicting annual and period averages by component are 

presented.

 Figure M.1-3: 20% Most Impaired Visibility Days: Pie charts depicting period 

averages and stacked bar charts depicting annual averages by component for the 20% 

most impaired days are presented.

 Figure M.1-4: 20% Least Impaired Visibility Days: Pie charts depicting period 

averages and stacked bar charts depicting annual averages by component are 

presented.

 Figure M.1-5: 2000-2004 Monthly Average Aerosol Extinction, All Monitored 

Days: Line graphs depicting monthly averages by year and component for the 

baseline period are presented.

 Figure M.1-6: 2005-2009 Monthly Average Aerosol Extinction, All Monitored 

Days: Line graphs depicting monthly averages by year and component for the 

progress period are presented.

 Figure M.1-7: 2000-2004 Progress Period Extinction, All Sampled Days: Stacked 

bar charts depicting daily averages by year and component for the baseline period are 

presented.

 Figure M.1-8: 2000-2004 Progress Period Extinction, All Sampled Days: Stacked 

bar charts depicting daily averages by year and component for the progress period are 

presented. 
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Slope

(change/yr.) p-value

Baseline 

(B)

Progress 

(P)

Difference 

(P -B)

Percent 

Change

Baseline Period Progress Period 2000-2009

Trend Statistics* Period Averages**

Group

Annual Averages, 5-Year Period Averages and Trends

Table M.1-1

Bryce Canyon NP, UT (BRCA1 Site)

Deciview (dv)

Best 20% Days 3.0 3.1 2.6 2.4 2.8 1.9 2.4 2.4 1.7 2.1 1.5 -0.1 0.0 2.8 2.1 -0.7 -25%

Worst 20% Days 10.8 11.3 13.2 11.1 11.8 11.8 10.7 12.7 11.0 13.3 9.2 0.1 0.2 11.6 11.9 0.3 3%

All Days 6.8 7.0 7.3 6.3 7.0 6.5 6.3 7.1 6.1 6.6 5.4 -0.1 0.2 6.9 6.5 -0.4 -6%

Total Extinction (Mm-1)

Best 20% Days 13.5 13.6 13.0 12.7 13.3 12.1 12.7 12.8 11.8 12.4 11.6 -0.1 0.0 13.2 12.4 -0.8 -6%

Worst 20% Days 30.0 33.0 38.8 33.8 33.4 33.8 29.4 37.9 30.9 43.7 25.9 0.4 0.2 33.8 35.1 1.3 4%

All Days 20.5 21.5 22.5 20.4 21.4 20.5 19.7 22.3 19.6 22.3 17.9 0.0 0.3 21.2 20.9 -0.3 -1%

Ammonium Sulfate Extinction (Mm-1)

Best 20% Days 1.6 1.8 1.4 1.1 1.5 1.2 1.7 1.3 1.1 1.4 1.0 0.0 0.2 1.5 1.4 -0.1 -7%

Worst 20% Days 6.5 6.3 4.2 4.4 4.8 6.2 5.1 4.9 5.0 4.0 4.3 -0.2 0.2 5.2 5.0 -0.2 -4%

All Days 3.8 4.1 3.0 2.7 3.3 3.8 3.6 3.4 3.1 2.8 2.7 -0.1 0.2 3.4 3.3 -0.1 -3%

Ammonium Nitrate Extinction (Mm-1)

Best 20% Days 0.7 0.8 0.8 0.5 0.7 0.4 0.4 0.7 0.4 0.6 0.4 0.0 0.0 0.7 0.5 -0.2 -29%

Worst 20% Days 2.6 3.8 1.4 1.4 3.4 2.3 2.3 3.8 1.5 1.4 3.1 -0.1 0.4 2.5 2.2 -0.3 -12%

All Days 1.4 1.6 1.5 1.2 1.7 1.1 1.3 1.8 1.0 1.0 1.2 0.0 0.2 1.5 1.2 -0.3 -20%

Particulate Organic Mass Extinction (Mm-1)

Best 20% Days 1.2 0.8 1.0 1.1 1.1 0.8 0.7 0.9 0.6 0.6 0.7 -0.1 0.0 1.0 0.7 -0.3 -30%

Worst 20% Days 6.1 7.5 14.1 11.1 8.0 10.5 7.5 13.0 7.5 20.7 4.8 0.5 0.2 9.4 11.8 2.4 26%

All Days 3.1 3.2 4.6 4.0 3.6 3.8 2.9 4.4 3.0 5.7 2.3 0.1 0.3 3.7 4.0 0.3 8%

Elemental Carbon Extinction (Mm-1)

Best 20% Days 0.4 0.4 0.4 0.3 0.5 0.3 0.3 0.2 0.2 0.2 0.2 0.0 0.0 0.4 0.2 -0.2 -50%

Worst 20% Days 2.1 1.9 2.3 2.4 3.2 2.6 2.1 3.0 1.5 3.5 1.3 0.1 0.2 2.4 2.5 0.1 4%

All Days 1.2 1.1 1.0 1.1 1.4 1.1 1.0 1.2 0.7 1.2 0.7 0.0 0.4 1.2 1.0 -0.2 -17%

Soil Extinction (Mm-1)

Best 20% Days 0.2 0.2 0.1 0.1 0.2 0.1 0.1 0.2 0.1 0.2 0.1 0.0 0.4 0.1 0.1 0.0 0%

Worst 20% Days 1.0 1.4 1.5 1.1 1.2 0.8 0.8 1.2 2.4 1.3 0.8 0.0 0.3 1.2 1.3 0.1 8%

All Days 0.5 0.7 0.7 0.5 0.6 0.4 0.5 0.7 0.9 0.7 0.5 0.0 0.2 0.6 0.6 0.0 0%

Coarse Mass Extinction (Mm-1)

Best 20% Days 0.5 0.7 0.4 0.5 0.3 0.3 0.4 0.4 0.4 0.4 0.2 0.0 0.1 0.5 0.4 -0.1 -20%

Worst 20% Days 2.6 3.1 6.1 4.3 3.9 2.5 2.6 2.9 3.7 3.7 2.5 0.0 0.4 4.0 3.1 -0.9 -23%

All Days 1.5 1.7 2.5 1.8 1.7 1.2 1.4 1.7 1.7 1.8 1.4 0.0 0.4 1.9 1.6 -0.3 -16%

Sea Salt Extinction (Mm-1)

Best 20% Days 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0%

Worst 20% Days 0.0 0.0 0.3 0.0 0.1 0.0 0.0 0.1 0.2 0.1 0.1 0.0 0.1 0.1 0.1 0.0 0%

All Days 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.3 0.0 0.0 0.0 0%

*Values highlighted in blue (red) indicate statistically significant decreasing (increasing) annual trend. Significance is measured at the 85% confidence level (p-value ≤0.15).

**Values highlighted in blue indicate a decrease in the 5-year average, values highlighted in red indicate an increase.

"---" Indicates a missing year that did not meet RHR data completeness criteria.
20% Most Impaired Visibility Days

20% Least Impaired Visibility Days

2.8

2.1

0

2

4

6

8

10

Deciveiw (dv)

Deciview

Period Average

11.6 11.9

0

2

4

6

8

10

12

14

Deciveiw (dv)

Deciview

Period Average

0

5

10

15

20

25

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Extinction (Mm-1)

Ammonium Sulfate

Ammonium Nitrate

Particulate Organic Mass

Elemental Carbon

Soil

Coarse Mass

Sea Salt

Expr1

0

2

4

6

8

10

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Extinction (Mm-1)

Ammonium Sulfate

Ammonium Nitrate

Particulate Organic Mass

Elemental Carbon

Soil

Coarse Mass

Sea Salt

Expr1

Annual and 5-Year Period Averages

Figure M.1-1

Bryce Canyon NP, UT (BRCA1 Site)

Annual and 5-Year Period Averages

Figure M.1-2

Bryce Canyon NP, UT (BRCA1 Site)
Bryce Canyon NP, UT (BRCA1 Site)

Figure M.1-3

20% Most Impaired Visibility Days

27%

15%

7%

28%

7%

4%

12%

0%

11.6 dv (10.8 - 13.2 dv )

Ammonium Sulfate

Rayleigh

Coarse Mass

Soil

Elemental Carbon

Particulate Organic Mass

Ammonium Nitrate

11.9 dv (10.7 - 13.3 dv )

2000-2004 Baseline Average 2005-2009 Progress Period Average

26%

14%

6%

34%

7%

4%

9% 0%

0

5

10

15

20

25

30

35

40

45

50

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Extinction (Mm-1

)

Sea Salt
Bryce Canyon NP, UT (BRCA1 Site)

Figure M.1-4

20% Least Impaired Visibility Days

68%

11%

5%

8%

3%1% 4%0%

2.8 dv (2.4 - 3.1 dv )

Ammonium Sulfate

Rayleigh

Coarse Mass

Soil

Elemental Carbon

Particulate Organic Mass

Ammonium Nitrate

2.1 dv (1.7 - 2.4 dv )

2000-2004 Baseline Average 2005-2009 Progress Period Average

73%

11%

4%

6%

2%1%3%0%

0

5

10

15

20

25

30

35

40

45

50

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Extinction (Mm-1

)

Sea Salt
2000-2004 Monthly Average Aerosol Extinction, All Monitored Days

Figure M.1-5

Bryce Canyon NP, UT (BRCA1 Site)

0

5

10

15

20

25

1 - '042 - '043 - '044 - '045 - '046 - '047 - '048 - '049 - '04

10 - '0411 - '0412 - '04

Extinction (Mm-1

)

Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

0

5

10

15

20

25

1 - '002 - '003 - '004 - '005 - '006 - '007 - '008 - '009 - '00

10 - '0011 - '0012 - '00

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '012 - '013 - '014 - '015 - '016 - '017 - '018 - '019 - '01

10 - '0111 - '0112 - '01

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '022 - '023 - '024 - '025 - '026 - '027 - '028 - '029 - '02

10 - '0211 - '0212 - '02

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '032 - '033 - '034 - '035 - '036 - '037 - '038 - '039 - '03

10 - '0311 - '0312 - '03

Extinction (Mm-1

)
2005-2009 Monthly Average Aerosol Extinction, All Monitored Days

Figure M.1-6

Bryce Canyon NP, UT (BRCA1 Site)

0

10

20

30

40

50

1 - '092 - '093 - '094 - '095 - '096 - '097 - '098 - '099 - '09

10 - '0911 - '0912 - '09

Extinction (Mm-1

)

Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

0

10

20

30

40

50

1 - '052 - '053 - '054 - '055 - '056 - '057 - '058 - '059 - '05

10 - '0511 - '0512 - '05

Extinction (Mm-1

)

0

10

20

30

40

50

1 - '062 - '063 - '064 - '065 - '066 - '067 - '068 - '069 - '06

10 - '0611 - '0612 - '06

Extinction (Mm-1

)

0

10

20

30

40

50

1 - '072 - '073 - '074 - '075 - '076 - '077 - '078 - '079 - '07

10 - '0711 - '0712 - '07

Extinction (Mm-1

)

0

10

20

30

40

50

1 - '082 - '083 - '084 - '085 - '086 - '087 - '088 - '089 - '08

10 - '0811 - '0812 - '08

Extinction (Mm-1

)
2000-2004 Progress Period Extinction, All Sampled Days

Figure M.1-7

Bryce Canyon NP, UT (BRCA1 Site)

x

0

20

40

60

80

100

 Jan-01

 Feb-01 Mar-01

 Apr-01

 May-01

 Jun-01

 Jul-01

 Aug-01 Sep-01

 Oct-01 Nov-01

 Dec-01

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-00

 Feb-00 Mar-00

 Apr-00

 May-00

 Jun-00

 Jul-00

 Aug-00 Sep-00

 Oct-00 Nov-00

 Dec-00

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-02

 Feb-02 Mar-02

 Apr-02

 May-02

 Jun-02

 Jul-02

 Aug-02 Sep-02

 Oct-02 Nov-02

 Dec-02

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-04

 Feb-04 Mar-04

 Apr-04

 May-04

 Jun-04

 Jul-04

 Aug-04 Sep-04

 Oct-04 Nov-04

 Dec-04

Extinction (Mm-1

)

Rayleigh Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

Indicates 20% Worst Day

0

20

40

60

80

100

 Jan-03

 Feb-03 Mar-03

 Apr-03

 May-03

 Jun-03

 Jul-03

 Aug-03 Sep-03

 Oct-03 Nov-03

 Dec-03

Extinction (Mm-1

)
2005-2009 Progress Period Extinction, All Sampled Days

Figure M.1-8

Bryce Canyon NP, UT (BRCA1 Site)

x

0

20

40

60

80

100

 Jan-06

 Feb-06 Mar-06

 Apr-06

 May-06

 Jun-06

 Jul-06

 Aug-06 Sep-06

 Oct-06 Nov-06

 Dec-06

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-05

 Feb-05 Mar-05

 Apr-05

 May-05

 Jun-05

 Jul-05

 Aug-05 Sep-05

 Oct-05 Nov-05

 Dec-05

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-07

 Feb-07 Mar-07

 Apr-07

 May-07

 Jun-07

 Jul-07

 Aug-07 Sep-07

 Oct-07 Nov-07

 Dec-07

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-09

 Feb-09 Mar-09

 Apr-09

 May-09

 Jun-09

 Jul-09

 Aug-09 Sep-09

 Oct-09 Nov-09

 Dec-09

Extinction (Mm-1

)

Rayleigh Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

Indicates 20% Worst Day

0

20

40

60

80

100

 Jan-08

 Feb-08 Mar-08

 Apr-08

 May-08

 Jun-08

 Jul-08

 Aug-08 Sep-08

 Oct-08 Nov-08

 Dec-08

Extinction (Mm-1

)
M.2. CANYONLANDS NP AND ARCHES NP (CANY1) 

The following tables and figures are presented in this section for the Canyonlands NP and 

Arches NP represented by the CANY1 IMPROVE Monitor: 

 

 Table M.2-1: Annual Averages, 5-Year Period Averages, and Trends: Table of 

averages and other metrics for the 20% least impaired days, the 20% most impaired 

days, and all sampled days is presented.

 Figure M.2-1: Annual and 5-Year Period Averages for the 20% Most Impaired 

Visibility Days: Line graphs depicting annual and period averages by component are 

presented.

 Figure M.2-2: Annual and 5-Year Period Averages for the 20% Least Impaired 

Visibility Days: Line graphs depicting annual and period averages by component are 

presented.

 Figure M.2-3: 20% Most Impaired Visibility Days: Pie charts depicting period 

averages and stacked bar charts depicting annual averages by component for the 20% 

most impaired days are presented.

 Figure M.2-4: 20% Least Impaired Visibility Days: Pie charts depicting period 

averages and stacked bar charts depicting annual averages by component are 

presented.

 Figure M.2-5: 2000-2004 Monthly Average Aerosol Extinction, All Monitored 

Days: Line graphs depicting monthly averages by year and component for the 

baseline period are presented.

 Figure M.2-6: 2005-2009 Monthly Average Aerosol Extinction, All Monitored 

Days: Line graphs depicting monthly averages by year and component for the 

progress period are presented.

 Figure M.2-7: 2000-2004 Progress Period Extinction, All Sampled Days: Stacked 

bar charts depicting daily averages by year and component for the baseline period are 

presented.

 Figure M.2-8: 2000-2004 Progress Period Extinction, All Sampled Days: Stacked 

bar charts depicting daily averages by year and component for the progress period are 

presented. 
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Slope

(change/yr.) p-value

Baseline 

(B)

Progress 

(P)

Difference 

(P -B)

Percent 

Change

Baseline Period Progress Period 2000-2009

Trend Statistics* Period Averages**

Group

Annual Averages, 5-Year Period Averages and Trends

Table M.2-1

Canyonlands NP and Arches NP, UT (CANY1 Site)

Deciview (dv)

Best 20% Days 3.6 4.1 4.2 3.3 3.5 2.3 2.7 3.0 2.7 3.3 2.6 -0.1 0.1 3.7 2.8 -0.9 -24%

Worst 20% Days 11.2 10.9 12.7 11.8 9.6 10.6 10.5 11.4 11.1 11.5 10.6 0.0 0.5 11.2 11.0 -0.2 -2%

All Days 7.2 7.4 7.9 6.9 6.4 6.4 6.6 7.1 6.7 6.4 6.1 -0.1 0.0 7.2 6.6 -0.6 -8%

Total Extinction (Mm-1)

Best 20% Days 14.4 15.1 15.3 14.0 14.3 12.7 13.1 13.6 13.2 13.9 13.0 -0.2 0.1 14.6 13.3 -1.3 -9%

Worst 20% Days 31.6 30.3 36.9 33.2 26.5 29.2 28.9 32.8 31.7 35.2 30.4 0.2 0.4 31.7 31.6 -0.1 0%

All Days 21.4 21.6 23.3 21.1 19.5 19.8 20.1 21.4 20.6 20.5 19.4 -0.1 0.2 21.4 20.5 -0.9 -4%

Ammonium Sulfate Extinction (Mm-1)

Best 20% Days 2.1 2.3 2.4 1.9 2.1 1.8 1.9 1.7 1.7 2.0 1.7 -0.1 0.0 2.2 1.8 -0.4 -18%

Worst 20% Days 6.3 6.8 4.0 5.5 5.3 5.8 5.6 5.0 5.2 4.8 5.6 -0.1 0.1 5.6 5.3 -0.3 -5%

All Days 4.1 4.5 3.6 3.4 3.6 4.1 3.8 3.6 3.4 3.0 3.2 -0.1 0.0 3.8 3.6 -0.2 -5%

Ammonium Nitrate Extinction (Mm-1)

Best 20% Days 0.4 0.6 0.8 0.6 0.5 0.4 0.5 0.6 0.6 0.6 0.5 0.0 0.3 0.6 0.5 -0.1 -17%

Worst 20% Days 3.4 3.9 2.1 2.1 3.2 3.9 3.4 3.7 1.6 3.7 5.1 0.0 0.5 3.0 3.3 0.3 10%

All Days 1.4 1.8 1.6 1.2 1.5 1.3 1.4 1.5 1.1 1.3 1.6 0.0 0.1 1.5 1.3 -0.2 -13%

Particulate Organic Mass Extinction (Mm-1)

Best 20% Days 1.2 1.2 1.2 1.0 1.1 0.5 0.5 0.7 0.8 0.7 0.8 -0.1 0.0 1.1 0.7 -0.4 -36%

Worst 20% Days 6.4 4.2 11.0 9.5 4.2 4.7 4.3 8.7 4.4 8.6 3.5 0.0 0.5 7.1 6.2 -0.9 -13%

All Days 3.2 2.5 3.9 3.6 2.5 2.3 2.3 3.4 2.4 3.1 2.0 0.0 0.2 3.1 2.7 -0.4 -13%

Elemental Carbon Extinction (Mm-1)

Best 20% Days 0.4 0.5 0.5 0.4 0.4 0.2 0.4 0.3 0.3 0.3 0.2 0.0 0.0 0.4 0.3 -0.1 -25%

Worst 20% Days 2.1 1.4 2.0 1.9 1.3 1.8 1.7 2.1 0.9 1.7 1.2 0.0 0.2 1.7 1.6 -0.1 -6%

All Days 1.2 0.9 1.1 1.0 0.8 0.9 1.0 1.0 0.6 0.7 0.6 0.0 0.1 1.0 0.8 -0.2 -20%

Soil Extinction (Mm-1)

Best 20% Days 0.2 0.4 0.4 0.2 0.3 0.1 0.2 0.3 0.2 0.3 0.2 0.0 0.2 0.3 0.2 -0.1 -33%

Worst 20% Days 0.8 1.8 2.8 1.0 0.9 0.9 1.4 0.9 2.6 1.8 1.4 0.0 0.3 1.5 1.5 0.0 0%

All Days 0.5 0.8 1.3 0.6 0.6 0.5 0.6 0.7 1.0 0.8 0.7 0.0 0.2 0.8 0.7 -0.1 -13%

Coarse Mass Extinction (Mm-1)

Best 20% Days 1.0 1.1 1.1 0.9 0.7 0.6 0.6 0.9 0.6 0.9 0.6 -0.1 0.1 1.0 0.7 -0.3 -30%

Worst 20% Days 3.4 3.1 6.0 4.1 2.4 3.0 3.5 3.3 7.8 5.4 4.5 0.2 0.2 3.8 4.6 0.8 21%

All Days 2.0 2.0 2.7 2.3 1.6 1.7 2.0 2.2 3.0 2.5 2.3 0.1 0.2 2.1 2.3 0.2 10%

Sea Salt Extinction (Mm-1)

Best 20% Days 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0%

Worst 20% Days 0.0 0.1 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.0 0.0 0.1 0.1 0.0 0%

All Days 0.0 0.1 0.1 0.0 0.1 0.0 0.0 0.1 0.1 0.1 0.0 0.0 0.2 0.0 0.1 0.1 0%

*Values highlighted in blue (red) indicate statistically significant decreasing (increasing) annual trend. Significance is measured at the 85% confidence level (p-value ≤0.15).

**Values highlighted in blue indicate a decrease in the 5-year average, values highlighted in red indicate an increase.

"---" Indicates a missing year that did not meet RHR data completeness criteria.
20% Most Impaired Visibility Days

20% Least Impaired Visibility Days

3.7

2.8

0

2

4

6

8

10

Deciveiw (dv)

Deciview

Period Average

11.2 11.0

0

2

4

6

8

10

12

14

Deciveiw (dv)

Deciview

Period Average

0

2

4

6

8

10

12

14

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Extinction (Mm-1)

Ammonium Sulfate

Ammonium Nitrate

Particulate Organic Mass

Elemental Carbon

Soil

Coarse Mass

Sea Salt

Expr1

0

2

4

6

8

10

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Extinction (Mm-1)

Ammonium Sulfate

Ammonium Nitrate

Particulate Organic Mass

Elemental Carbon

Soil

Coarse Mass

Sea Salt

Expr1

Annual and 5-Year Period Averages

Figure M.2-1

Canyonlands NP and Arches NP, UT (CANY1 Site)

Annual and 5-Year Period Averages

Figure M.2-2

Canyonlands NP and Arches NP, UT (CANY1 Site)
Canyonlands NP and Arches NP, UT (CANY1 Site)

Figure M.2-3

20% Most Impaired Visibility Days

28%

18%

9%

22%

6%

5%

12%

0%

11.2 dv (9.6 - 12.7 dv )

Ammonium Sulfate

Rayleigh

Coarse Mass

Soil

Elemental Carbon

Particulate Organic Mass

Ammonium Nitrate

11 dv (10.5 - 11.5 dv )

2000-2004 Baseline Average 2005-2009 Progress Period Average

29%

17%

10%

19%

5%

5%

15%

0%

0

5

10

15

20

25

30

35

40

45

50

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Extinction (Mm-1

)

Sea Salt
Canyonlands NP and Arches NP, UT (CANY1 Site)

Figure M.2-4

20% Least Impaired Visibility Days

15% 61%

4%

8%

3%

2%

7% 0%

3.7 dv (3.3 - 4.2 dv )

Ammonium Sulfate

Rayleigh

Coarse Mass

Soil

Elemental Carbon

Particulate Organic Mass

Ammonium Nitrate

2.8 dv (2.3 - 3.3 dv )

2000-2004 Baseline Average 2005-2009 Progress Period Average

68%

14%

4%

5%

2%2% 5% 0%

0

5

10

15

20

25

30

35

40

45

50

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Extinction (Mm-1

)

Sea Salt
2000-2004 Monthly Average Aerosol Extinction, All Monitored Days

Figure M.2-5

Canyonlands NP and Arches NP, UT (CANY1 Site)

0

5

10

15

20

25

1 - '042 - '043 - '044 - '045 - '046 - '047 - '048 - '049 - '04

10 - '0411 - '0412 - '04

Extinction (Mm-1

)

Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

0

5

10

15

20

25

1 - '002 - '003 - '004 - '005 - '006 - '007 - '008 - '009 - '00

10 - '0011 - '0012 - '00

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '012 - '013 - '014 - '015 - '016 - '017 - '018 - '019 - '01

10 - '0111 - '0112 - '01

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '022 - '023 - '024 - '025 - '026 - '027 - '028 - '029 - '02

10 - '0211 - '0212 - '02

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '032 - '033 - '034 - '035 - '036 - '037 - '038 - '039 - '03

10 - '0311 - '0312 - '03

Extinction (Mm-1

)
2005-2009 Monthly Average Aerosol Extinction, All Monitored Days

Figure M.2-6

Canyonlands NP and Arches NP, UT (CANY1 Site)

0

5

10

15

20

25

1 - '092 - '093 - '094 - '095 - '096 - '097 - '098 - '099 - '09

10 - '0911 - '0912 - '09

Extinction (Mm-1

)

Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

0

5

10

15

20

25

1 - '052 - '053 - '054 - '055 - '056 - '057 - '058 - '059 - '05

10 - '0511 - '0512 - '05

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '062 - '063 - '064 - '065 - '066 - '067 - '068 - '069 - '06

10 - '0611 - '0612 - '06

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '072 - '073 - '074 - '075 - '076 - '077 - '078 - '079 - '07

10 - '0711 - '0712 - '07

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '082 - '083 - '084 - '085 - '086 - '087 - '088 - '089 - '08

10 - '0811 - '0812 - '08

Extinction (Mm-1

)
2000-2004 Progress Period Extinction, All Sampled Days

Figure M.2-7

Canyonlands NP and Arches NP, UT (CANY1 Site)

x

0

20

40

60

80

100

 Jan-01

 Feb-01 Mar-01

 Apr-01

 May-01

 Jun-01

 Jul-01

 Aug-01 Sep-01

 Oct-01 Nov-01

 Dec-01

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-00

 Feb-00 Mar-00

 Apr-00

 May-00

 Jun-00

 Jul-00

 Aug-00 Sep-00

 Oct-00 Nov-00

 Dec-00

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-02

 Feb-02 Mar-02

 Apr-02

 May-02

 Jun-02

 Jul-02

 Aug-02 Sep-02

 Oct-02 Nov-02

 Dec-02

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-04

 Feb-04 Mar-04

 Apr-04

 May-04

 Jun-04

 Jul-04

 Aug-04 Sep-04

 Oct-04 Nov-04

 Dec-04

Extinction (Mm-1

)

Rayleigh Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

Indicates 20% Worst Day

0

20

40

60

80

100

 Jan-03

 Feb-03 Mar-03

 Apr-03

 May-03

 Jun-03

 Jul-03

 Aug-03 Sep-03

 Oct-03 Nov-03

 Dec-03

Extinction (Mm-1

)
2005-2009 Progress Period Extinction, All Sampled Days

Figure M.2-8

Canyonlands NP and Arches NP, UT (CANY1 Site)

x

0

20

40

60

80

100

 Jan-06

 Feb-06 Mar-06

 Apr-06

 May-06

 Jun-06

 Jul-06

 Aug-06 Sep-06

 Oct-06 Nov-06

 Dec-06

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-05

 Feb-05 Mar-05

 Apr-05

 May-05

 Jun-05

 Jul-05

 Aug-05 Sep-05

 Oct-05 Nov-05

 Dec-05

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-07

 Feb-07 Mar-07

 Apr-07

 May-07

 Jun-07

 Jul-07

 Aug-07 Sep-07

 Oct-07 Nov-07

 Dec-07

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-09

 Feb-09 Mar-09

 Apr-09

 May-09

 Jun-09

 Jul-09

 Aug-09 Sep-09

 Oct-09 Nov-09

 Dec-09

Extinction (Mm-1

)

Rayleigh Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

Indicates 20% Worst Day

0

20

40

60

80

100

 Jan-08

 Feb-08 Mar-08

 Apr-08

 May-08

 Jun-08

 Jul-08

 Aug-08 Sep-08

 Oct-08 Nov-08

 Dec-08

Extinction (Mm-1

)
M.3. CAPITOL REEF NP (CAPI1) 

The following tables and figures are presented in this section for the Capitol Reef NP 

represented by the CAPI1 IMPROVE Monitor: 

 

 Table M.3-1: Annual Averages, 5-Year Period Averages, and Trends: Table of 

averages and other metrics for the 20% least impaired days, the 20% most impaired 

days, and all sampled days is presented.

 Figure M.3-1: Annual and 5-Year Period Averages for the 20% Most Impaired 

Visibility Days: Line graphs depicting annual and period averages by component are 

presented.

 Figure M.3-2: Annual and 5-Year Period Averages for the 20% Least Impaired 

Visibility Days: Line graphs depicting annual and period averages by component are 

presented.

 Figure M.3-3: 20% Most Impaired Visibility Days: Pie charts depicting period 

averages and stacked bar charts depicting annual averages by component for the 20% 

most impaired days are presented.

 Figure M.3-4: 20% Least Impaired Visibility Days: Pie charts depicting period 

averages and stacked bar charts depicting annual averages by component are 

presented.

 Figure M.3-5: 2000-2004 Monthly Average Aerosol Extinction, All Monitored 

Days: Line graphs depicting monthly averages by year and component for the 

baseline period are presented.

 Figure M.3-6: 2005-2009 Monthly Average Aerosol Extinction, All Monitored 

Days: Line graphs depicting monthly averages by year and component for the 

progress period are presented.

 Figure M.3-7: 2000-2004 Progress Period Extinction, All Sampled Days: Stacked 

bar charts depicting daily averages by year and component for the baseline period are 

presented.

 Figure M.3-8: 2000-2004 Progress Period Extinction, All Sampled Days: Stacked 

bar charts depicting daily averages by year and component for the progress period are 

presented. 
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Slope

(change/yr.) p-value

Baseline 

(B)

Progress 

(P)

Difference 

(P -B)

Percent 

Change

Baseline Period Progress Period 2000-2009

Trend Statistics* Period Averages**

Group

Annual Averages, 5-Year Period Averages and Trends

Table M.3-1

Capitol Reef NP, UT (CAPI1 Site)

Deciview (dv)

Best 20% Days 4.5 4.6 4.3 3.1 4.1 2.6 --- 3.1 2.5 2.7 2.0 -0.2 0.0 4.1 2.7 -1.4 -34%

Worst 20% Days 11.6 10.8 12.1 9.4 10.6 11.8 --- 11.7 11.4 10.3 9.5 -0.1 0.3 10.9 11.3 0.4 4%

All Days 7.6 7.6 7.7 6.1 7.2 7.0 --- 7.0 6.6 6.3 5.7 -0.1 0.0 7.2 6.7 -0.5 -7%

Total Extinction (Mm-1)

Best 20% Days 15.7 15.8 15.4 13.7 15.2 13.0 --- 13.7 12.9 13.2 12.2 -0.3 0.0 15.2 13.2 -2.0 -13%

Worst 20% Days 33.2 29.8 34.1 25.7 29.1 33.4 --- 34.7 32.2 30.1 26.2 0.0 0.5 30.4 32.6 2.2 7%

All Days 22.2 22.0 22.5 19.0 21.1 21.4 --- 21.6 20.5 19.8 18.4 -0.2 0.1 21.4 20.8 -0.6 -3%

Ammonium Sulfate Extinction (Mm-1)

Best 20% Days 1.9 2.2 1.9 1.4 2.2 1.6 --- 1.6 1.4 1.9 1.3 -0.1 0.1 1.9 1.6 -0.3 -16%

Worst 20% Days 6.3 7.1 4.2 5.1 6.7 7.3 --- 5.6 5.1 4.8 5.1 -0.1 0.3 5.9 5.7 -0.2 -3%

All Days 4.1 4.5 3.2 3.1 4.0 4.4 --- 3.6 3.4 3.1 3.0 -0.1 0.1 3.8 3.6 -0.2 -5%

Ammonium Nitrate Extinction (Mm-1)

Best 20% Days 1.1 1.2 1.1 0.7 0.9 0.4 --- 0.6 0.6 0.6 0.3 -0.1 0.0 1.0 0.6 -0.4 -40%

Worst 20% Days 3.1 4.7 3.5 2.0 3.8 3.3 --- 3.2 2.2 2.2 5.3 -0.2 0.1 3.4 2.7 -0.7 -21%

All Days 1.8 2.1 2.1 1.3 2.0 1.4 --- 1.6 1.2 1.2 1.8 -0.1 0.0 1.9 1.3 -0.6 -32%

Particulate Organic Mass Extinction (Mm-1)

Best 20% Days 1.7 1.1 1.6 1.0 1.4 1.0 --- 1.1 0.9 0.5 0.8 -0.1 0.0 1.3 0.9 -0.4 -31%

Worst 20% Days 7.2 3.8 9.0 4.8 4.4 7.4 --- 9.5 6.9 6.6 2.9 0.2 0.4 5.8 7.6 1.8 31%

All Days 3.4 2.6 3.7 2.5 2.8 3.2 --- 3.6 2.9 2.7 1.8 0.0 0.5 3.0 3.1 0.1 3%

Elemental Carbon Extinction (Mm-1)

Best 20% Days 0.6 0.6 0.8 0.5 0.5 0.4 --- 0.4 0.3 0.2 0.3 0.0 0.0 0.6 0.3 -0.3 -50%

Worst 20% Days 2.0 1.4 2.0 1.3 1.4 2.5 --- 2.2 1.3 1.1 1.0 0.0 0.2 1.6 1.8 0.2 13%

All Days 1.2 1.0 1.2 0.9 0.9 1.2 --- 1.0 0.7 0.7 0.6 0.0 0.1 1.0 0.9 -0.1 -10%

Soil Extinction (Mm-1)

Best 20% Days 0.2 0.3 0.2 0.4 0.4 0.1 --- 0.3 0.1 0.3 0.2 0.0 0.5 0.3 0.2 -0.1 -33%

Worst 20% Days 1.0 1.4 1.5 0.8 1.5 0.8 --- 1.3 2.4 1.9 0.8 0.1 0.1 1.3 1.6 0.3 23%

All Days 0.5 0.8 0.8 0.6 1.0 0.5 --- 0.7 0.9 0.9 0.6 0.0 0.2 0.7 0.8 0.1 14%

Coarse Mass Extinction (Mm-1)

Best 20% Days 1.2 1.4 0.8 0.7 0.7 0.4 --- 0.7 0.6 0.7 0.4 -0.1 0.0 1.0 0.6 -0.4 -40%

Worst 20% Days 4.6 2.5 4.9 2.7 2.1 3.0 --- 3.8 5.1 4.3 2.2 0.1 0.2 3.4 4.1 0.7 21%

All Days 2.2 2.1 2.5 1.5 1.4 1.6 --- 2.0 2.2 2.1 1.5 0.0 0.5 2.0 2.0 0.0 0%

Sea Salt Extinction (Mm-1)

Best 20% Days 0.0 0.1 0.0 0.1 0.1 0.0 --- 0.1 0.1 0.0 0.0 0.0 0.4 0.1 0.0 -0.1 -100%

Worst 20% Days 0.0 0.0 0.0 0.0 0.0 0.0 --- 0.1 0.2 0.1 0.1 0.0 0.0 0.0 0.1 0.1 0%

All Days 0.0 0.0 0.0 0.0 0.1 0.0 --- 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0%

*Values highlighted in blue (red) indicate statistically significant decreasing (increasing) annual trend. Significance is measured at the 85% confidence level (p-value ≤0.15).

**Values highlighted in blue indicate a decrease in the 5-year average, values highlighted in red indicate an increase.

"---" Indicates a missing year that did not meet RHR data completeness criteria.
20% Most Impaired Visibility Days

20% Least Impaired Visibility Days

4.1

2.7

0

2

4

6

8

10

Deciveiw (dv)

Deciview

Period Average

11.3 10.9

0

2

4

6

8

10

12

14

Deciveiw (dv)

Deciview

Period Average

0

2

4

6

8

10

12

14

2000 2001 2002 2003 2004 2005 2006* 2007 2008 2009 2010

Extinction (Mm-1)

Ammonium Sulfate

Ammonium Nitrate

Particulate Organic Mass

Elemental Carbon

Soil

Coarse Mass

Sea Salt

Expr1

0

2

4

6

8

10

2000 2001 2002 2003 2004 2005 2006* 2007 2008 2009 2010

Extinction (Mm-1)

Ammonium Sulfate

Ammonium Nitrate

Particulate Organic Mass

Elemental Carbon

Soil

Coarse Mass

Sea Salt

Expr1

Annual and 5-Year Period Averages

Figure M.3-1

Capitol Reef NP, UT (CAPI1 Site)

Annual and 5-Year Period Averages

Figure M.3-2

Capitol Reef NP, UT (CAPI1 Site)

*Missing years did not meet RHR data completeness criteria.

*Missing years did not meet RHR data completeness criteria.
Capitol Reef NP, UT (CAPI1 Site)

Figure M.3-3

20% Most Impaired Visibility Days

31%

19%

11%

19%

5%

4%

11% 0%

10.9 dv (9.4 - 12.1 dv )

Ammonium Sulfate

Rayleigh

Coarse Mass

Soil

Elemental Carbon

Particulate Organic Mass

Ammonium Nitrate

11.3 dv (10.3 - 11.8 dv )

2000-2004 Baseline Average 2005-2009 Progress Period Average

29%

18%

8%

23%

5%

5%

12%

0%

0

5

10

15

20

25

30

35

40

45

50

2000 2001 2002 2003 2004 2005 2006* 2007 2008 2009

Extinction (Mm-1

)

Sea Salt

*Missing years did not meet RHR data completeness criteria. Only complete years are included in 5-year average pie charts.
Capitol Reef NP, UT (CAPI1 Site)

Figure M.3-4

20% Least Impaired Visibility Days

60%

13%

6%

9%

4%

2%

6% 0%

4.1 dv (3.1 - 4.5 dv )

Ammonium Sulfate

Rayleigh

Coarse Mass

Soil

Elemental Carbon

Particulate Organic Mass

Ammonium Nitrate

2.7 dv (2.5 - 3.1 dv )

2000-2004 Baseline Average 2005-2009 Progress Period Average

68%

12%

4%

7%

3%2% 4%0%

0

5

10

15

20

25

30

35

40

45

50

2000 2001 2002 2003 2004 2005 2006* 2007 2008 2009

Extinction (Mm-1

)

Sea Salt

*Missing years did not meet RHR data completeness criteria. Only complete years are included in 5-year average pie charts.
2000-2004 Monthly Average Aerosol Extinction, All Monitored Days

Figure M.3-5

Capitol Reef NP, UT (CAPI1 Site)

0

5

10

15

20

25

1 - '042 - '043 - '044 - '045 - '046 - '047 - '048 - '049 - '04

10 - '0411 - '0412 - '04

Extinction (Mm-1

)

Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

0

5

10

15

20

25

1 - '002 - '003 - '004 - '005 - '006 - '007 - '008 - '009 - '00

10 - '0011 - '0012 - '00

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '012 - '013 - '014 - '015 - '016 - '017 - '018 - '019 - '01

10 - '0111 - '0112 - '01

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '022 - '023 - '024 - '025 - '026 - '027 - '028 - '029 - '02

10 - '0211 - '0212 - '02

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '032 - '033 - '034 - '035 - '036 - '037 - '038 - '039 - '03

10 - '0311 - '0312 - '03

Extinction (Mm-1

)
2005-2009 Monthly Average Aerosol Extinction, All Monitored Days

Figure M.3-6

Capitol Reef NP, UT (CAPI1 Site)

0

5

10

15

20

25

1 - '092 - '093 - '094 - '095 - '096 - '097 - '098 - '099 - '09

10 - '0911 - '0912 - '09

Extinction (Mm-1

)

Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

0

5

10

15

20

25

1 - '052 - '053 - '054 - '055 - '056 - '057 - '058 - '059 - '05

10 - '0511 - '0512 - '05

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '062 - '063 - '064 - '065 - '066 - '067 - '068 - '069 - '06

10 - '0611 - '0612 - '06

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '072 - '073 - '074 - '075 - '076 - '077 - '078 - '079 - '07

10 - '0711 - '0712 - '07

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '082 - '083 - '084 - '085 - '086 - '087 - '088 - '089 - '08

10 - '0811 - '0812 - '08

Extinction (Mm-1

)

*Note that monthly averages for the year 2006 are shown here, but this year did not meet RHR data completeness criteria.
2000-2004 Progress Period Extinction, All Sampled Days

Figure M.3-7

Capitol Reef NP, UT (CAPI1 Site)

x

0

20

40

60

80

100

 Jan-01

 Feb-01 Mar-01

 Apr-01

 May-01

 Jun-01

 Jul-01

 Aug-01 Sep-01

 Oct-01 Nov-01

 Dec-01

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-00

 Feb-00 Mar-00

 Apr-00

 May-00

 Jun-00

 Jul-00

 Aug-00 Sep-00

 Oct-00 Nov-00

 Dec-00

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-02

 Feb-02 Mar-02

 Apr-02

 May-02

 Jun-02

 Jul-02

 Aug-02 Sep-02

 Oct-02 Nov-02

 Dec-02

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-04

 Feb-04 Mar-04

 Apr-04

 May-04

 Jun-04

 Jul-04

 Aug-04 Sep-04

 Oct-04 Nov-04

 Dec-04

Extinction (Mm-1

)

Rayleigh Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

Indicates 20% Worst Day

0

20

40

60

80

100

 Jan-03

 Feb-03 Mar-03

 Apr-03

 May-03

 Jun-03

 Jul-03

 Aug-03 Sep-03

 Oct-03 Nov-03

 Dec-03

Extinction (Mm-1

)
2005-2009 Progress Period Extinction, All Sampled Days

Figure M.3-8

Capitol Reef NP, UT (CAPI1 Site)

x

0

20

40

60

80

100

 Jan-06

 Feb-06 Mar-06

 Apr-06

 May-06

 Jun-06

 Jul-06

 Aug-06 Sep-06

 Oct-06 Nov-06

 Dec-06

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-05

 Feb-05 Mar-05

 Apr-05

 May-05

 Jun-05

 Jul-05

 Aug-05 Sep-05

 Oct-05 Nov-05

 Dec-05

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-07

 Feb-07 Mar-07

 Apr-07

 May-07

 Jun-07

 Jul-07

 Aug-07 Sep-07

 Oct-07 Nov-07

 Dec-07

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-09

 Feb-09 Mar-09

 Apr-09

 May-09

 Jun-09

 Jul-09

 Aug-09 Sep-09

 Oct-09 Nov-09

 Dec-09

Extinction (Mm-1

)

Rayleigh Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

Indicates 20% Worst Day

0

20

40

60

80

100

 Jan-08

 Feb-08 Mar-08

 Apr-08

 May-08

 Jun-08

 Jul-08

 Aug-08 Sep-08

 Oct-08 Nov-08

 Dec-08

Extinction (Mm-1

)

*Note that daily averages for the year 2006 are shown here, but this year did not meet RHR data completeness criteria.
M.4. ZION NP (ZICA1) 

The following tables and figures are presented in this section for the Zion NP represented 

by the ZICA1 IMPROVE Monitor: 

 

 Table M.4-1: Annual Averages, 5-Year Period Averages, and Trends: Table of 

averages and other metrics for the 20% least impaired days, the 20% most impaired 

days, and all sampled days is presented.

 Figure M.4-1: Annual and 5-Year Period Averages for the 20% Most Impaired 

Visibility Days: Line graphs depicting annual and period averages by component are 

presented.

 Figure M.4-2: Annual and 5-Year Period Averages for the 20% Least Impaired 

Visibility Days: Line graphs depicting annual and period averages by component are 

presented.

 Figure M.4-3: 20% Most Impaired Visibility Days: Pie charts depicting period 

averages and stacked bar charts depicting annual averages by component for the 20% 

most impaired days are presented.

 Figure M.4-4: 20% Least Impaired Visibility Days: Pie charts depicting period 

averages and stacked bar charts depicting annual averages by component are 

presented.

 Figure M.4-5: 2000-2004 Monthly Average Aerosol Extinction, All Monitored 

Days: Line graphs depicting monthly averages by year and component for the 

baseline period are presented.

 Figure M.4-6: 2005-2009 Monthly Average Aerosol Extinction, All Monitored 

Days: Line graphs depicting monthly averages by year and component for the 

progress period are presented.

 Figure M.4-7: 2000-2004 Progress Period Extinction, All Sampled Days: Stacked 

bar charts depicting daily averages by year and component for the baseline period are 

presented.

 Figure M.4-8: 2000-2004 Progress Period Extinction, All Sampled Days: Stacked 

bar charts depicting daily averages by year and component for the progress period are 

presented.
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Slope

(change/yr.) p-value

Baseline 

(B)

Progress 

(P)

Difference 

(P -B)

Percent 

Change

Baseline Period Progress Period 2000-2009

Trend Statistics* Period Averages**

Group

Annual Averages, 5-Year Period Averages and Trends

Table M.4-1

Zion NP, UT (ZICA1 Site)

Deciview (dv)

Best 20% Days --- --- --- --- 4.5 3.9 4.7 4.9 4.0 4.2 --- 0.0 0.5 5.0 4.3 -0.7 -14%

Worst 20% Days --- --- --- --- 12.2 11.6 13.3 13.0 12.9 10.8 --- -0.2 0.4 12.5 12.3 -0.2 -2%

All Days --- --- --- --- 8.2 7.7 8.3 8.7 8.1 7.3 --- -0.1 0.4 8.3 8.0 -0.3 -4%

Total Extinction (Mm-1)

Best 20% Days --- --- --- --- 15.7 14.8 16.0 16.4 15.0 15.3 --- 0.1 0.5 16.5 15.5 -1.0 -6%

Worst 20% Days --- --- --- --- 34.3 32.6 39.4 38.0 39.1 29.6 --- -0.2 0.5 36.9 35.7 -1.2 -3%

All Days --- --- --- --- 23.7 22.4 24.4 25.0 24.2 21.3 --- -0.1 0.5 24.4 23.5 -0.9 -4%

Ammonium Sulfate Extinction (Mm-1)

Best 20% Days --- --- --- --- 1.8 1.7 1.9 1.6 1.4 1.7 --- 0.0 0.1 1.8 1.7 -0.1 -6%

Worst 20% Days --- --- --- --- 6.9 6.8 5.7 4.9 4.9 4.8 --- -0.5 0.0 5.2 5.4 0.2 4%

All Days --- --- --- --- 4.1 4.2 3.9 3.5 3.5 3.2 --- -0.2 0.0 3.6 3.6 0.0 0%

Ammonium Nitrate Extinction (Mm-1)

Best 20% Days --- --- --- --- 0.7 0.5 0.4 0.8 0.5 0.8 --- 0.0 0.2 0.8 0.6 -0.2 -25%

Worst 20% Days --- --- --- --- 2.8 1.5 1.8 2.2 2.1 2.1 --- -0.1 0.5 2.2 1.9 -0.3 -14%

All Days --- --- --- --- 1.3 0.8 1.0 1.5 1.1 1.0 --- 0.0 0.5 1.3 1.1 -0.2 -15%

Particulate Organic Mass Extinction (Mm-1)

Best 20% Days --- --- --- --- 1.6 1.1 1.4 1.3 1.4 1.1 --- -0.1 0.4 1.8 1.3 -0.5 -28%

Worst 20% Days --- --- --- --- 5.6 6.5 11.4 9.9 10.4 4.4 --- 0.6 0.5 9.3 8.5 -0.8 -9%

All Days --- --- --- --- 3.2 3.0 4.1 4.0 4.1 2.5 --- 0.0 0.5 4.0 3.5 -0.5 -13%

Elemental Carbon Extinction (Mm-1)

Best 20% Days --- --- --- --- 0.7 0.5 0.8 0.6 0.5 0.4 --- 0.0 0.1 0.8 0.6 -0.2 -25%

Worst 20% Days --- --- --- --- 1.8 2.5 3.7 2.3 2.0 1.4 --- -0.2 0.2 2.4 2.4 0.0 0%

All Days --- --- --- --- 1.2 1.4 1.7 1.3 1.0 0.9 --- -0.1 0.1 1.4 1.3 -0.1 -7%

Soil Extinction (Mm-1)

Best 20% Days --- --- --- --- 0.2 0.2 0.3 0.4 0.2 0.3 --- 0.0 0.1 0.3 0.3 0.0 0%

Worst 20% Days --- --- --- --- 1.8 1.2 1.5 2.4 2.3 1.8 --- 0.1 0.2 1.7 1.8 0.1 6%

All Days --- --- --- --- 0.9 0.6 0.8 1.2 1.0 1.0 --- 0.1 0.1 0.9 0.9 0.0 0%

Coarse Mass Extinction (Mm-1)

Best 20% Days --- --- --- --- 0.7 0.8 1.1 1.5 0.9 0.9 --- 0.0 0.2 1.1 1.0 -0.1 -9%

Worst 20% Days --- --- --- --- 5.3 4.2 5.3 6.2 7.2 5.1 --- 0.3 0.4 5.6 5.6 0.0 0%

All Days --- --- --- --- 3.0 2.5 2.8 3.5 3.3 2.7 --- 0.1 0.5 3.1 3.0 -0.1 -3%

Sea Salt Extinction (Mm-1)

Best 20% Days --- --- --- --- 0.0 0.0 0.0 0.0 0.1 0.0 --- 0.0 0.1 0.0 0.0 0.0 0%

Worst 20% Days --- --- --- --- 0.1 0.1 0.1 0.1 0.3 0.1 --- 0.0 0.4 0.1 0.1 0.0 0%

All Days --- --- --- --- 0.0 0.0 0.0 0.1 0.1 0.0 --- 0.0 0.2 0.0 0.1 0.1 0%

*Values highlighted in blue (red) indicate statistically significant decreasing (increasing) annual trend. Significance is measured at the 85% confidence level (p-value ≤0.15).

**Values highlighted in blue indicate a decrease in the 5-year average, values highlighted in red indicate an increase.

"---" Indicates a missing year that did not meet RHR data completeness criteria.
20% Most Impaired Visibility Days

20% Least Impaired Visibility Days

4.3

0

2

4

6

8

10

Deciveiw (dv)

Deciview

Period Average

12.3

0

2

4

6

8

10

12

14

Deciveiw (dv)

Deciview

Period Average

0

2

4

6

8

10

12

14

2000* 2001* 2002* 2003* 2004 2005 2006 2007 2008 2009 2010*

Extinction (Mm-1)

Ammonium Sulfate

Ammonium Nitrate

Particulate Organic Mass

Elemental Carbon

Soil

Coarse Mass

Sea Salt

Expr1

0

2

4

6

8

10

2000* 2001* 2002* 2003* 2004 2005 2006 2007 2008 2009 2010*

Extinction (Mm-1)

Ammonium Sulfate

Ammonium Nitrate

Particulate Organic Mass

Elemental Carbon

Soil

Coarse Mass

Sea Salt

Expr1

Annual and 5-Year Period Averages

Figure M.4-1

Zion NP, UT (ZICA1 Site)

Annual and 5-Year Period Averages

Figure M.4-2

Zion NP, UT (ZICA1 Site)

*Missing years did not meet RHR data completeness criteria.

*Missing years did not meet RHR data completeness criteria.
Zion NP, UT (ZICA1 Site)

Figure M.4-3

20% Most Impaired Visibility Days

27%

14%

6%

26%

7%

5%

15%

0%

12.5 dv

Ammonium SulfateRayleighCoarse MassSoilElemental CarbonParticulate Organic MassAmmonium Nitrate

12.3 dv (10.8 - 13.3 dv 

2000-2004 Baseline Average Estimate* 2005-2009 Progress Period 

5%

24%

7%

5%

16%

0%

05

101520253035404550

2000* 2001* 2002* 2003* 2004 2005 2006 2007 2008 

Extinction (Mm-1)

Sea Salt

*Baseline years did not meet RHR data completeness criteria. The 5-year baseline average represents an approximation based on methods text.
Zion NP, UT (ZICA1 Site)

Figure M.4-4

20% Least Impaired Visibility Days

59%

11%

5%

11%

5%

2% 7% 0%

5 dv

Ammonium SulfateRayleighCoarse MassSoilElemental CarbonParticulate Organic MassAmmonium Nitrate

4.3 dv (3.9 - 4.9 dv )

2000-2004 Baseline Average Estimate* 2005-2009 Progress Period 

11%

4%

8%

4%

2% 7% 0%

05

101520253035404550

2000* 2001* 2002* 2003* 2004 2005 2006 2007 2008 

Extinction (Mm-1)

Sea Salt

*Baseline years did not meet RHR data completeness criteria. The 5-year baseline average represents an approximation based on methods text.
2000-2004 Monthly Average Aerosol Extinction, All Monitored Days

Figure M.4-5

Zion NP, UT (ZICA1 Site)

0

2

4

6

8

10

1 - '042 - '043 - '044 - '045 - '046 - '047 - '048 - '049 - '04

10 - '0411 - '0412 - '04

Extinction (Mm-1

)

Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

0

2

4

6

8

10

1 - '002 - '003 - '004 - '005 - '006 - '007 - '008 - '009 - '00

10 - '0011 - '0012 - '00

Extinction (Mm-1

)

0

2

4

6

8

10

1 - '012 - '013 - '014 - '015 - '016 - '017 - '018 - '019 - '01

10 - '0111 - '0112 - '01

Extinction (Mm-1

)

0

2

4

6

8

10

1 - '022 - '023 - '024 - '025 - '026 - '027 - '028 - '029 - '02

10 - '0211 - '0212 - '02

Extinction (Mm-1

)

0

2

4

6

8

10

1 - '032 - '033 - '034 - '035 - '036 - '037 - '038 - '039 - '03

10 - '0311 - '0312 - '03

Extinction (Mm-1

)

*Note that monthly averages for the years 2000, 2001, 2002 and 2003 are shown here, but these years did not meet RHR data completeness criteria.
2005-2009 Monthly Average Aerosol Extinction, All Monitored Days

Figure M.4-6

Zion NP, UT (ZICA1 Site)

0

5

10

15

20

25

1 - '092 - '093 - '094 - '095 - '096 - '097 - '098 - '099 - '09

10 - '0911 - '0912 - '09

Extinction (Mm-1

)

Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

0

5

10

15

20

25

1 - '052 - '053 - '054 - '055 - '056 - '057 - '058 - '059 - '05

10 - '0511 - '0512 - '05

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '062 - '063 - '064 - '065 - '066 - '067 - '068 - '069 - '06

10 - '0611 - '0612 - '06

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '072 - '073 - '074 - '075 - '076 - '077 - '078 - '079 - '07

10 - '0711 - '0712 - '07

Extinction (Mm-1

)

0

5

10

15

20

25

1 - '082 - '083 - '084 - '085 - '086 - '087 - '088 - '089 - '08

10 - '0811 - '0812 - '08

Extinction (Mm-1

)
2000-2004 Progress Period Extinction, All Sampled Days

Figure M.4-7

Zion NP, UT (ZICA1 Site)

x

0

20

40

60

80

100

 Jan-01

 Feb-01 Mar-01

 Apr-01

 May-01

 Jun-01

 Jul-01

 Aug-01 Sep-01

 Oct-01 Nov-01

 Dec-01

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-00

 Feb-00 Mar-00

 Apr-00

 May-00

 Jun-00

 Jul-00

 Aug-00 Sep-00

 Oct-00 Nov-00

 Dec-00

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-02

 Feb-02 Mar-02

 Apr-02

 May-02

 Jun-02

 Jul-02

 Aug-02 Sep-02

 Oct-02 Nov-02

 Dec-02

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-04

 Feb-04 Mar-04

 Apr-04

 May-04

 Jun-04

 Jul-04

 Aug-04 Sep-04

 Oct-04 Nov-04

 Dec-04

Extinction (Mm-1

)

Rayleigh Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

Indicates 20% Worst Day

0

20

40

60

80

100

 Jan-03

 Feb-03 Mar-03

 Apr-03

 May-03

 Jun-03

 Jul-03

 Aug-03 Sep-03

 Oct-03 Nov-03

 Dec-03

Extinction (Mm-1

)

*Note that daily averages for the years 2000, 2001, 2002 and 2003 are shown here, but these years did not meet RHR data completeness criteria.
2005-2009 Progress Period Extinction, All Sampled Days

Figure M.4-8

Zion NP, UT (ZICA1 Site)

x

0

20

40

60

80

100

 Jan-06

 Feb-06 Mar-06

 Apr-06

 May-06

 Jun-06

 Jul-06

 Aug-06 Sep-06

 Oct-06 Nov-06

 Dec-06

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-05

 Feb-05 Mar-05

 Apr-05

 May-05

 Jun-05

 Jul-05

 Aug-05 Sep-05

 Oct-05 Nov-05

 Dec-05

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-07

 Feb-07 Mar-07

 Apr-07

 May-07

 Jun-07

 Jul-07

 Aug-07 Sep-07

 Oct-07 Nov-07

 Dec-07

Extinction (Mm-1

)

0

20

40

60

80

100

 Jan-09

 Feb-09 Mar-09

 Apr-09

 May-09

 Jun-09

 Jul-09

 Aug-09 Sep-09

 Oct-09 Nov-09

 Dec-09

Extinction (Mm-1

)

Rayleigh Ammonium Sulfate Ammonium Nitrate POM EC Soil CM Sea Salt

Indicates 20% Worst Day

0

20

40

60

80

100

 Jan-08

 Feb-08 Mar-08

 Apr-08

 May-08

 Jun-08

 Jul-08

 Aug-08 Sep-08

 Oct-08 Nov-08

 Dec-08

Extinction (Mm-1

)