1

NOAA Technical Memorandum GLERL-115

PHYSICAL AND CHEMICAL VARIABLES OF SAGINAW BAY, LAKE HURON IN

1994-1996

Thomas H. Johengen1

Thomas F. Nalepa2

Gregory A. Lang2

David L. Fanslow2

Henry A. Vanderploeg2

Megan A. Agy1

1NOAA GLERL/University of Michigan, Cooperative Institute for Limnology and Ecosystems Research

Ann Arbor, MI 48105

2NOAA, Great Lakes Environmental Research Laboratory, Ann Arbor, MI 48105

Great Lakes Environmental Research Laboratory

Ann Arbor, Michigan

January 2000

UNITED STATES

DEPARTMENT OF COMMERCE

William Daley

Secretary

NATIONAL OCEANIC AND

ATMOSPHERIC ADMINISTRATION

D. James Baker

Under Secretary for Oceans

and Atmosphere/Administrator

NAT OI NAL OCEANIC AND ATMOSPHERIC ADMINISTRAT OI N

U.S.DEPARTMENT OF COMMERCE
2

NOTICE

Mention of a commercial company or product does not constitute an endorsement

by the NOAA Environmental Research Laboratories. Use of information from

this publication concerning proprietary products or the tests of such products for

publicity or advertising purposes is not authorized. This is GLERL Contribution

No. 1154.

This publication is available as a PDF file and can be downloaded from GLERL’s

web site: www.glerl.noaa.gov. Hard copies can be requested from the GLERL

Publications Unit, 2205 Commonwealth Blvd., Ann Arbor, MI 48105.

pubs@glerl.noaa.gov.
3

Table of Contents

Abstract .............................................................................................................................................. 5

Introduction ........................................................................................................................................ 5

Justification of Study Site .................................................................................................................. 6

Description of Study Site ................................................................................................................... 6

Sampling Sites and Dates................................................................................................................... 8

Field Procedures................................................................................................................................. 9

Laboratory Procedures ....................................................................................................................... 9

Results .............................................................................................................................................. 11

Acknowledgments............................................................................................................................ 17

References ........................................................................................................................................ 17

Appendix 1.--Values of all physical and chemical variables collected in Saginaw Bay

during 1994–1996 ............................................................................................................................ 34

Tables

Table 1.--Mean depth, surface area, and water volume of the inner bay, the outer bay, and the

bay as a whole. Values were computed from digitized NOAA chart No. 14863. A 0.66 m

offset was used to account for low water datum ................................................................................ 7

Table 2.--Location and water depth of sampling sites in Saginaw Bay in 1991-1996. The sites

were designated as Stations 1 through 26. Thirteen of the sites were established by the

Environmental Protection Agency (EPA) in 1974-75 while the other 13 sites were established

by NOAA ........................................................................................................................................... 8

Table 3.--Sampling dates for all cruises of the Saginaw Bay monitoring study during 1991–1996,

and the corresponding inner bay mean temperature recorded for those dates ................................... 9

Table 4.-- A list of outliers for water temperature as determined from the functional relationship

between shipboard temperature and CTD temperature as determined for all values in 1994-1996.

Final values in Appendix I were corrected as defined in the text.The case number corresponds to

numbers given in Figure 2 ............................................................................................................... 13

Table 5.--A list of outliers for chlorophyll as determined from the functional relationship between

chlorophyll and CTD fluorescence as determined for all values in 1994-1996. Chl1

 is the value

derived from this relationship. Final values in Appendix I were corrected as given in the text.

The case number corresponds to numbers given in Figure 3........................................................... 13
4

Table 6.--List of outliers for total suspended solids (TSS) as determined from the functional

relationship between TSS and CTD transmissivity. TSS1 is the value derived from the functional

relationship between TSS and CTD transmissivity. Final values were corrected as defined in the

text and included in Appendix I. Case numbers correspond to numbers given in Figure 4 ............ 13

Table 7.--List of outliers for total suspended solids (TSS) as determined from the functional

relationship between TSS and Secchi depth transparency. TSS1 is the value derived from the

functional relationship between TSS and Secchi depth. Final values were corrected as defined in

 the text and included in Appendix I. Case numbers correspond to numbers given in Figure 5 ..... 15

Table 8.--List of secchi depth transparencies that were reported as “to bottom” and the corresponding value of the nearest station and the values predicted from the functional relationship

between Secchi depth and total suspended solids. Final values in Appendix I were selected as

defined in the text............................................................................................................................. 16

Table 9.--Yearly and pooled mean coefficients of variation for field replicates collected during

1994–1996 for each of the listed variables. Individual values (each n) were derived from duplicate

water samples collected at station 5-1m, station 20-1m, and station 20-8m during each sampling

date for that year. In 1996, TDP, SRP, NO3, NH4, SiO2, were only determined on samples

collected from station 5-1m, and DOC measurements were not conducted on any samples. The

number of samples used in the computation (N) denote these difference among parameters ......... 16

Figures

Figure 1.--Location of sampling sites in Saginaw Bay, 1991-96. Sites with open circles were

sampled only in 1991 and 1992, while sites with closed circles were sampled every year. Dashed

lines differentiate the inner bay form the outer bay and the outer bay from Lake Huron. ................ 7

Figure 2.--Relationship between temperatures taken shipboard and temperatures from similar depths

taken in situ with a CTD. Each point represents a sampling date, site, and depth where temperature

was taken by both methods. Circled points are considered outliers at P < 0.01. Individual outliers

are numbered and can be identified by the corresponding case number in Table 4......................... 12

Figure 3.--Relationship between chlorophyll (ug/L) and fluorescence as measured in situ with the

CTD. Each point represents a sampling date, site, and depth where the two variables were measured.

Circled points are considered outliers at P < 0.01. Individual outliers are numbered and can be

identified by the corresponding case number in Table 5.................................................................. 12

Figure 4.--Relationship between total suspended solids (mg/L) and transmissivity as measured in situ

with the CTD. Each point represents a sampling date, site, and depth where the two variables were

measured. Circled points are considered outliers at P < 0.01. Individual outliers are numbered and

can be identified by the corresponding case number in Table 6 ...................................................... 14

Figure 5.--Relationship between total suspended solids (mg/L) and Secchi-disk transparency (m).

Values natural-log transformed. Each point represents a sampling date, site, and depth where the

two variables were measured ........................................................................................................... 14

Figure 6.--Mean (+ SE) values of selected physical and chemical variables at sites in the

inner bay (A) and outer bay (B) for all sampling dates in 1994-96 ................................................. 19

Legend: =1994 =1995 =1996
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Abstract. Physical and chemical data were collected in Saginaw Bay, Lake Huron over

the period 1991–1996 as part of a monitoring program to assess the ecological impact of

the zebra mussel, Dreissena polymorpha. This report presents monitoring results for the

years 1994–1996 and builds upon the previous technical memorandum GLERL-91 (ftp://

ftp.glerl.noaa.gov/publications/tech_reports/glerl-091/) that described results for the

years 1991–1993. Detailed accounts of sampling times, locations, and methods, and

analytical procedures are included in each of the reports.

INTRODUCTION

This technical memorandum presents physical and chemical data collected in Saginaw Bay from 1994 to

1996 and is a follow-up to a previous report (ERL-GLERL-91) that described data collected on Saginaw

Bay during 1991–1993 (Nalepa et al., 1996). All of these data were collected as part of a larger effort to

monitor and assess impacts of the zebra mussel, Dreissena polymorpha, on the Saginaw Bay ecosystem.

The first large recruitment of mussels into the bay did not occur until summer 1991, therefore, the data

presented herein reflect physical and chemical conditions of Saginaw Bay from 3 to 6 years after the

initial invasion. Information on the selection of the study site and its description are repeated here from

the original report for convenience. A detailed account of sampling sites and dates, and of collection

methods and analytical procedures used throughout the entire 6-year monitoring study are also presented.

While all physical and chemical data collected over the period 1994–1996 are presented, no attempt is

made at interpretation. Data summaries and interpretations for the 1991–1993 results are contained in a

series of papers published in a special issue of the Journal of Great Lakes Research (Volume 21, Number 4). The following papers specifically summarize and interpret these physical and chemical data:

Fahnenstiel et al. (1995a, 1995b) and Johengen et al. (1995). Additional manuscripts are being prepared

that will interpret the 1994–1996 water quality monitoring data and integrate these results with additional results on collections of the phytoplankton, zooplankton, and benthic communities. The complete

1991–1996 data set for the Saginaw Bay Ecosystem Monitoring Study is archived on the NOAA

GLERL web site and can be viewed at the address: ftp://ftp.glerl.noaa.gov/publications/tech_reports/

glerl-115. This site will also house a record of all CTD profiles taken during sample collections. In the

original report, all CTD profiles taken in 1991-93 were presented in graphical form, however, CTD

profiles for 1994–96 are only given on the web site.

Physical and Chemical Variables of Saginaw Bay, Lake Huron in 1994-1996

Thomas H. Johengen

Thomas F. Nalepa

Gregory A. Lang

David L. Fanslow

Henry A. Vanderploeg

Megan A. Agy
6

JUSTIFICATION OF STUDY SITE

Soon after the zebra mussel was discovered in the Great Lakes in 1988, we identified Saginaw Bay as an

ideal location to assess ecological changes that might result from the filtering activities of this organism.

Specific considerations that led to the decision to initiate a monitoring program in the bay were (1) at the

time, the zebra mussel was not yet established in the bay, thus baseline conditions immediately prior to

the mussel’s invasion could be documented; further, previous surveys of water quality parameters in

1974-80 (Smith et al., 1977; Bierman et al., 1984) could provide a longer term perspective to assess

potential changes; (2) the bay had extensive areas of hard bottom, along with ideal temperature and

food regimes, and thus large populations of mussels were expected to develop; (3) there existed an

important commercial and sport fishery that could be affected; (4) with a natural gradient between the

eutrophic inner bay and the more oligotrophic outer bay, the bay provided an opportunity to assess

impacts over a wide range of trophic conditions, and; (5) the bay is an Area of Concern as designated by

the International Joint Commission and the subject of remedial action by the State of Michigan. After a

decade of little or no monitoring in the bay, surveys of selected physical and chemical variables not only

provide information to assess changes induced by the zebra mussel, but also provide information to

assess the bay’s response to continued efforts to improve water quality.

DESCRIPTION OF STUDY SITE

Saginaw Bay is a shallow, well-mixed extension of the western shoreline of Lake Huron (Figure 1). The

bay is 21-42 km wide, about 82 km long , and has a drainage basin of about 21,000 km2 . Total area of

the bay is 2.77 x 109 m2, and total water volume is 24.54 x 109 m3 (Table 1). The bay can be functionally

divided into an inner and outer region by a line extending along its narrowest width (21 km) from Sand

Point to Point Lookout (Figure 1). A broad shoal and several islands (Charity Islands) along this line

provide a natural demarcation between the two regions. The outer bay can be defined from Lake Huron

by a line from Pointe aux Barques to Au Sable point. Differences in physical and chemical features of

the inner and outer bay regions are distinct (Beeton et al., 1967; Smith et al., 1977). The inner bay has a

mean depth of 5.1 m, is nutrient-rich, and is heavily influenced by input from the Saginaw River, which

accounts for over 70% of the total tributary flow into the bay. The outer bay has a mean depth of 13.7 m

and is more influenced by the colder, nutrient-poor waters of Lake Huron.

Circulation within the inner and outer bay is generally weak; currents average about 7 cm s-1 in the inner

bay and about 11 cm s-1 in the outer bay (Danek and Saylor, 1977). Exchange and flushing of water in

the inner bay occurs when winds blow along the long axis of the bay (southwest/northeast). Dominant

winds in the summer are from the southwest. Little exchange occurs when winds are perpendicular to

the long axis (west/east). Most water exchange/flushing between the inner and outer bay occurs on the

northern side of the bay within the deep channel that occurs between Point Lookout and Charity Island

and which continues into the inner bay. Although some water may exit the inner bay along the southern

shoreline, it is of minor significance because of the shallowness of the region (Danek and Saylor, 1977).

Furthermore, preliminary results of Lagrangian current measurements in the outer bay during the summers of 1992 and 1993 suggest that the flushing of inner bay waters into Lake Huron is episodic in

nature (McCormick, unpublished).

Bottom substrates in Saginaw Bay range from silt to mostly cobble and rock. The inner bay has a wide

sand-gravel bar that extends along the eastern side of the bay from the Saginaw River to the Charity

Islands. Another sand-gravel bar extends along the western shoreline to Point Au Gres. Both sand bars
7

Sand Point

Point

Au Gres

Point

Lookout

N

10 Km

Saginaw

River

Charity

Island 6

9

20

24

16

18

17

3

2

1

4

7

5

13

11

10

15

14

8

19 26

25

23 22

21

12

43o40'N 43o50'N 44o00'N 44o10'N

83o40'W 83o20'W 83o00'W

Figure 1. Location of sampling sites in Saginaw Bay, 1991-96. Sites with open circles were

sampled only in 1991 and 1992, while sites with closed circles were sampled every year.

Dashed lines differentiate the inner bay form the outer bay and the outer bay from Lake Huron.

Table 1. Mean depth, surface area, and water volume of the inner bay,

the outer bay, and the bay as a whole. Values were computed from

digitized NOAA chart No. 14863. A 0.66 m offset was used to account

for low water datum.

Mean Depth (m) Surface Area (m2) Volume (m3)

Inner Bay 5.09 1.55 x 109 7.91 x 109

Outer Bay 13.66 1.22 x 109 16.63 x 109

Whole Bay 8.86 2.77 x 109 24.54 x 109
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have irregular areas of cobble along with patches of sand, gravel, and pebbles. The bars extend into the

shorelines as extensive flats grade into marshes. Between the two sand bars is an area of maximum

depth where the substrate consists of fine-grained sediments (silt/mud). Based on areal estimates of

substrate type by Wood (1964) and extensive benthic sampling in the late 1980s (Nalepa unpublished),

we estimated that 70% of the bottom in the inner bay consists of sand, gravel, and cobble, and 30%

consists of silt/mud. In the outer bay, the east shore is rocky, as is the area around the Charity Islands.

The western shore has extensive sandy areas, with rock and clay found near Point Lookout. Most of the

offshore region of the outer bay has a bottom consisting of silty sand (Nalepa unpublished).

SAMPLING SITES AND DATES

At the inception of the monitoring program, 26 sites were selected to provide thorough coverage of both

the inner and outer bay (Figure 1). The exact location and water depth of these sites, designated as

Stations 1-26, are given in Table 2. Thirteen of the sites (Stations 1, 2, 3, 6, 8, 9,12, 15, 17, 18, 22, 25,

26) were the same sites sampled by the Environmental Protection Agency (EPA) in 1974-75 (Smith et

al., 1977), while the other 13 sites (Stations 4, 5, 7, 10, 11, 13, 14, 16, 19, 20, 21, 23, 24) were established as monitoring sites by this laboratory (NOAA). The EPA sites were sampled only in 1991 and

1992, while the NOAA sites were sampled all 6 years. Samples were generally collected once a month

from April to October, except in May when occasionally two sampling periods occurred within the

month. The presence of ice and bad weather delayed the first sampling trip until May in 1995 and 1996.

In addition, such logistical constraints occasionally resulted in not all sampling sites being visited on all

Table 2. Location and water depth

of sampling sites in Saginaw Bay

in 1991-93. The sites were

designated as Stations 1 through

26. Thirteen of the sites were

established by the Environmental

Protection Agency (EPA) in 1974-

75 while the other 13 sites were

established by NOAA.

Station Latitude Longitude Depth (m)

SB1 (EPA-12) 43 38’ 25” 83 39’ 40” 4.0

SB2 (EPA-8) 43 40’ 00” 83 48’ 25” 4.0

SB3 (EPA-7) 43 41’ 05” 83 50’ 35” 3.0

SB4 (NOAA) 43 44’ 39” 83 52’ 04” 7.0

SB5 (NOAA) 43 53’ 43” 83 51’ 38” 3.0

SB6 (EPA-30) 43 58’ 05” 83 49’ 15” 4.0

SB7 (NOAA) 43 50’ 17” 83 47’ 34” 7.0

SB8 (EPA-27) 43 49’ 10” 83 37’ 10” 5.0

SB9 ((EPA-29) 43 54’ 50” 83 44’ 50” 7.0

SB10 (NOAA) 43 56’ 30” 83 37’ 26” 11.0

SB11 (NOAA) 44 01’ 14” 83 34’ 25” 9.0

SB12 (EPA-35) 43 58’ 45” 83 34’ 40” 13.0

SB13 (NOAA) 43 57’ 34” 83 29’ 19” 3.0

SB14 (NOAA) 43 44’ 18” 83 38’ 27” 3.0

SB15 (EPA-26) 43 45’ 40” 83 31’ 35” 5.0

SB16 (NOAA) 43 50’ 49” 83 33’ 45” 3.0

SB17 (EPA-34) 43 53’ 00” 83 23’ 35” 3.0

SB18 (EPA-61) 43 55’ 40” 83 26’ 25” 2.0

SB19 (NOAA) 44 03’ 10” 83 26’ 31” 4.0

SB20 (NOAA) 44 07’ 34” 83 30’ 00” 16.0

SB21 (NOAA) 44 15’ 10” 83 30’ 23” 4.0

SB22 (EPA-49) 44 12’ 40” 83 22’ 40” 20.5

SB23 (NOAA) 44 13’ 15” 83 15’ 45” 28.5

SB24 (NOAA) 44 00’ 05” 83 17’ 00” 12.5

SB25 (EPA-51) 44 07’ 25” 83 10’ 15” 28.5

SB26 (EPA-52) 44 04’ 10” 83 04’ 50” 13.5
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sampling dates. All sites were located using Loran C during the study period. A listing of all sampling

dates for every cruise during the entire 1991-96 period is given in Table 3. Also included in this table is

the mean temperature for all sampling sites in the inner bay on each sampling date.

FIELD PROCEDURES

Water samples for nutrients, carbon,

chlorophyll, and total suspended solids

were collected with a 5-L Niskin bottle at

a depth of 1 m at every site and at the

mid-water column depth for sites deeper

than 10 m. Samples were placed into acidrinsed 4-L polyethylene containers and

immediately stored in coolers. Water

temperature was obtained by placing a

thermometer in a portion of water collected in the Niskin bottle immediately

after it was brought to the surface. At each

of the NOAA sites, a Sea-Bird CTD with

fluorometer and transmissometer (25-cm

beam path) was slowly lowered from the

surface to 1 m above the bottom. All data

points were logged twice each second.

Secchi-disk transparency was measured

by lowering a white disk 25-cm in diameter. In 1996, photosynthetically active

irradiation (PAR) was measured at a

number of depths in the water column

with a LI-COR 193SB spherical (4 p)

light sensor and LI-COR 1000 data

logger, from which the underwater light

extinction coefficient (kPAR) was calculated. These measurements were not taken

during 1994–1995.

For quality control, duplicate water

samples were collected at each sampling

depth at Stations 5 and 20 on each sampling date during 1994-1996. Nutrient

analysis was performed separately on the

two samples.

LABORATORY PROCEDURES

All water samples were processed within

24 h of collection. The following are

detailed analytical procedures for each of

the variables measured.

Table 3. Sampling dates for all cruises of the Saginaw Bay

monitoring study during 1991 – 1996, and the corresponding

inner bay mean temperature recorded for those dates.

Year Cruise Sampling Mean Inner Bay

Number Dates Temp (oC)

911 April 11-18 8.2

912 May 1-3 10.4

913 May 20-21 16.0

914 June 15-18 22.9

1991 915 July 22-26 23.6

916 August 19-23 22.8

917 September 9-12 22.1

918 October 7-22 12.2

919 November 8-12 3.5

921 April 14-15 3.8

922 May 4-6 10.1

923 May 27 – June 3 15.1

1992 924 June 15-23 19.0

925 July 20-23 20.2

926 August 10-12 21.9

927 September 9-15 19.0

928 October 4-7 14.6

931 April 29-30 7.8

932 May 17 13.7

933 June 21 19.5

1993 934 July 12 23.6

935 August 10 21.0

936 September 8 19.9

937 October 5 &14 11.9

941 April 20 7.0

942 June 6-10 17.9

1994 943 July 11-13 22.3

944 August 8-10 20.6

945 September 8-9 19.3

946 October 17-19 14.1

951 May 2-3 8.1

952 May 17-18 14.2

953 June 12-13 18.9

1995 954 July 17 & 19 23.4

955 August 21-22 24.1

956 September 12 19.7

957 October 25 & 30 10.1

961 May 4 & 7 7.4

962 May 28 & 30 14.3

963 June 11-12 16.4

1996 964 June 27 21.7

965 July 15 & 17 22.4

966 August 21 23.8

967 September 20 18.5
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Chlorophyll

Chlorophyll (Chl) was measured in triplicate using the method of Strickland and Parsons (1972). Fifty

or 100 mL of water was filtered through a 47-mm GF/F Whatman Glass Fiber filter. The filters were

placed individually into amber vials containing 5 mL of cold acetone (90 %) and then stored in the

freezer. Within 30 days, the filters were ground in cold acetone and then steeped for 24 h in the freezer.

Samples were centrifuged, the extract poured into a 1-cm curvette, and readings taken with a Turner

Design Fluorometer. After an initial reading, 2 drops of 1N HCL were added to the curvette and another

reading taken.

Nutrients

Nutrient concentrations were determined using standard automated colorimetric techniques (APHA,

1990) on a Technicon Auto Analyzer II, as detailed in Davis and Simmons (1979). Dissolved nutrients

were determined on sample aliquots which were filtered through a pre-rinsed 0.2-um HA Millipore filter

or a 0.2-um Nucleopore filter. Nitrate + nitrite was determined using the cadmium reduction method

and hereafter is simply referred to as NO3. Ammonia concentrations (NH4) were determined by the

Bertholet reaction. Phosphorus concentrations were determined by the molybdate/ascorbic acid method.

Soluble reactive phosphorus (SRP) was determined on a filtered portion of the water sample, while total

phosphorus (TP) and total dissolved phosphorus (TDP) were determined after digesting 50 mL of unfiltered and filtered sample, respectively, with potassium persulfate in an autoclave for 30 min (Menzel

and Corwin, 1965). Values of nitrate and soluble reactive phosphorus were occasionally below detection.

For these occasions, concentrations were reported to be at our operationally defined detection limit of

0.01 mg/L for nitrate and 0.1 μg/L for soluble reactive phosphorus. Particulate silica (PSi) was determined on 100 mL aliquots of water filtered through a 0.45-μm Nucleopore filter and then extracted with

0.2N NaOH at 95 oC for 30 minutes (Krausse et al., 1983). The extract was neutralized with 1N H2

SO4

and silica (SiO2) concentrations determined by the heteropoly blue method. Chloride (Cl) concentrations were determined by the mercuric thiocyanide/ferric ammonium sulfate method. For the 1991–93

data set, particulate phosphorus was calculated from the difference between TP and TDP. This calculation was not conducted for the current data set. Nutrient concentrations are reported for mass units of N,

P, SiO2, and Cl for the respective nutrient ions.

Alkalinity

Alkalinity was not determined for samples collected during 1994–96. For samples from 1991–93,

alkalinity (Akl) was determined from the milli-equivalents of acid needed to bring the pH of the water

sample below 4.0 (Davis and Simmons, 1979). Twenty mL of sample was pipetted with a volumetric

buret into a chemically clean polyethylene bottle that contained 5 mL of 0.01 N HCL. Additional 1 mL

aliquots of acid were added if the pH was above 4.0.

Carbon

Samples for particulate organic carbon (POC) and dissolved organic carbon (DOC) were processed in

triplicate by filtering 50 or 100 mL of sample through pre-combusted GFF filters. For POC, filters were

frozen until analysis, then thawed, acidified with 10 % v/v HCL, and dried at 70o

C for 24 h. POC

measurements were made with a Perkin Elmer (model 2400) CHN elemental analyzer. The filtrate was

frozen for later determination of DOC. Prior to analysis, the filtrate was acidified with HCL and sparged

with air for 6 min to remove CO2 . DOC was determined using a Shimadzu total organic carbon analyzer (model TOC-5000) fitted with an auto sampler. DOC concentrations were not determined in 1996.
11

Total Suspended Solids

Total Suspended Solids (TSS) were determined gravimetrically by filtering between 500 and 2,000 mL

of sample through a pre-dried, pre-weighed Whatman GFC 47-mm filter. The filters were then dried at

60oC for at least 48 h and then reweighed.

RESULTS

Data

Values of all measured physical and chemical variables on each sampling date in 1994-96 are given in

Appendix I and are also contained in both ASCII and MS Excel files at ftp://ftp.glerl.noaa.gov/publications/tech_reports/glerl-115. As was done in the first data report, values for temperature, chlorophyll,

and total suspended solids from discrete samples were compared to values obtained from CTD profiles

throughout the water column. That is, shipboard temperature was compared to CTD temperature, extracted chlorophyll was compared to CTD fluorescence, and total suspended solids was compared to

CTD transmissivity for all sampling dates, stations, and depths for which a comparison was possible.

This procedure was used to identify discrete values that should be checked for errors, as well as to

provide a means for empirically calibrating the CTD instrumentation. Statistical models describing the

relationship between the three variables and their CTD counterparts were all significant, indicating good

agreement between the two independent measures for each of the three variables. Outliers were identified as values where the studentized residual was greater than a t-value corresponding to P = 0.01.

Before inclusion in Appendix I, the outliers were examined and corrections made if deemed necessary.

Several factors were considered in deciding whether or not to correct an outlier, including variation

among analytical replicates, values at nearby sites or depths, the value derived from the model, and

values derived from additional models using co-determined parameters such as total phosphorus and

particulate organic carbon.

The relationship between discretely measured water temperature and CTD water temperature was fit to

the linear model: Temp = 0.99 + 0.974 (CTDtemp) (P < 0.001; r2 = 0.969; n = 260), and three outliers

were identified by the model (Figure 2; Table 4). For case 1, the outlier for the 1 m sample was replaced

with the discrete temperature determined for the 14 m sample at that site because their was no thermal

stratification and this value was in better agreement with the CTD measured temperature. For case 2, the

final temperature was obtained from the average of the shipboard and CTD because there was no evidence to disprove either. For case 3, the CTD value was used because a well pronounced thermocline

existed and the shipboard determination appeared to be in error.

The relationship between chlorophyll and CTD fluorescence was fit to the linear model: CHL = -0.519 +

1.344 (CTDfluor) (P < 0.001; r2=0.691; n=331), and 7 outliers were identified by the model (Figure 3;

Table 5). For all of the outliers we kept the original discrete value based on excellent agreement among

analytical replicates, as well as, good agreement between the discrete chlorophyll value and a predicted

value based on a relationship between discrete values of CHL and particulate organic carbon value (P <

0.001; r2=0.783; n=352).

The relationship between total suspended solids (TSS) and CTD transmissivity fit a linear model after

transmissivity was log transformed: TSS = 29.733 * -6.706 (ln Trans) (P < 0.001, r2 = 0.892, n=330) and

ten outliers were identified by the model (Figure 4; Table 6). A second relationship between TSS and

Secchi-disk transparency was also examined to provide an independent evaluation of the TSS outliers.

For this relationship only TSS values obtained from the 1 m samples were included in the model. The
12

0 10 20 30

TempCTD

0

10

20

30

Temp

1

2

3

Figure 2. Relationship between

temperatures taken shipboard

and temperatures from similar

depths taken in situ with a CTD.

Each point represents a sampling date, site, and depth where

temperature was taken by both

methods. Circled points are

considered outliers at P < 0.01.

Individual outliers are numbered

and can be identified by the

corresponding case number in

Table 4.

0 5 10 15 20

FluorCTD

0

10

20

30

40

CHL

1

2

3

4

5

6

7

Figure 3. Relationship between

chlorophyll (ug/L) and fluorescence as measured in situ with

the CTD. Each point represents a

sampling date, site, and depth

where the two variables were

measured. Circled points are

considered outliers at P < 0.01.

Individual outliers are numbered

and can be identified by the

corresponding case number in

Table 5.
13

Table 5. A list of outliers for chlorophyll as determined from the functional

relationship between chlorophyll and CTD fluorescence as determined for all

values in 1994-1996. Chl1 is the value derived from this relationship. Final

values in Appendix I were corrected as given in the text. The case number

corresponds to numbers given in Figure 3.

Case Year Cruise Station Sampling Chl Chl1 Appendix I

Depth (m) (mg/L) (mg/L) Chl (mg/L)

1 1994 944 4 1 26.7 14.3 26.7

2 1994 944 14 1 38.8 16.2 38.8

3 1994 945 14 1 25.5 17.0 25.5

4 1995 956 7 1 6.1 19.0 6.1

5 1996 964 4 1 4.3 13.9 4.3

6 1996 966 5 1 16.8 5.6 16.8

7 1996 966 14 1 15.6 0.7 15.6

Table 6. List of outliers for total suspended solids (TSS) as determined from the

functional relationship between TSS and CTD transmissivity. TSS1 is the value

derived from the functional relationship between TSS and CTD transmissivity.

Final values were corrected as defined in the text and included in Appendix I.

Case numbers correspond to numbers given in Figure 4.

Case Year Cruise Station Sampling TSS TSS1 Appendix I

Depth (m) (mg/L) (mg/L) TSS (mg/L)

1 1994 944 14 1 15.7 8.7 15.7

2 1995 951 14 1 11.1 6.3 11.1

3 1995 954 13 1 14.0 9.3 14.0

4 1995 954 16 1 12.4 8.4 12.4

5 1995 956 7 1 8.4 12.8 8.4

6 1995 957 13 1 16.3 12.6 16.3

7 1995 957 14 1 15.5 9.7 15.5

8 1996 962 10 6 18.6 11.1 18.6

9 1996 966 5 1 10.5 6.9 10.5

10 1996 967 4 1 16.6 25.6- 16.6

 Table 4. A list of outliers for water temperature as determined from the functional relationship

between shipboard temperature and CTD temperature as determined for all values in 1994-

1996. Final values in Appendix I were corrected as defined in the text. The case number

corresponds to numbers given in Figure 2.

Case Year Cruise Station Sampling Shipboard CTD Appendix I

Depth (m) Temp. (C) Temp. (C) Temp. (C)

1 1994 942 23 1 12.6 9.1 10.4

2 1994 943 24 1 18.0 22.2 20.1

3 1996 966 23 14 21.5 12.6 12.6
14

0 20 40 60 80 100

TRANS

0

5

10

15

20

25

TSS

 1

 2

 3

 4

 5

 6

 7

 8

 9

10

-1 0 1 2 3

lnSecchi

-4

-2

0

2

4

lnTSS

 1

 2

 3

 4

 5

 6

Figure 4. Relationship

between total suspended

solids (mg/L) and transmissivity as measured in situ

with the CTD. Each point

represents a sampling date,

site, and depth where the two

variables were measured.

Circled points are considered

outliers at P < 0.01. Individual outliers are numbered

and can be identified by the

corresponding case number

in Table 6.

Figure 5. Relationship between total

suspended solids (mg/L) and Secchidisk transparency (m). Values

natural-log transformed. Each point

represents a sampling date, site, and

depth where the two variables were

measured.
15

Table 7. List of outliers for total suspended solids (TSS) as determined from the

functional relationship between TSS and Secchi depth transparency. TSS1 is the

value derived from the functional relationship between TSS and Secchi depth.

Final values were corrected as defined in the text and included in Appendix I.

Case numbers correspond to numbers given in Figure 5.

Case Year Cruise Station Sampling TSS TSS1 Appendix I

Depth (m) (mg/L) (mg/L) TSS (mg/L)

1 1994 941 11 1 3.1 1.1 3.1

2 1994 942 21 1 0.3 0.9 0.3

3 1994 942 24 1 0.1 0.6 0.7

4 1996 961 21 1 0.3 0.9 0.3

5 1996 964 5 1 0.7 2.4 0.7

6 1996 964 21 1 1.6 0.6 1.6

relationship was described by the power function: ln TSS = 2.443 * -1.534 (ln Secchi depth) (P < 0.001,

r2

 = 0.890, n=250) and six new outliers for TSS were identified beyond those previously identified by

the transmissivity relationship (Figure 5; Table 7). For each of the 10 values identified as outliers by the

transmissivity relationship, the original discrete value was selected based on agreement with the values

of the nearest neighbor and the values predicted from the relationship with Secchi depth (Table 6). For

each of the 6 values identified as outliers by the TSS and Secchi depth relationship, except for case 3, we

kept the original discrete value. For case 3, we replaced the original value with the value observed for

the 6 m sample at this site because it agreed closely with a predicted value based on transmissivity, and

there was no stratification within the water column at the time of sampling (Table 7).

The introduction of zebra mussels into Saginaw Bay resulted in a general increase in water clarity during

at least certain portions of the year. Consequently, during the later monitoring years, secchi depths were

frequently greater than the depth of the water column at some of the sampling stations. Specifically,

there were 33 cases where the secchi depth was recorded as “to bottom” during 1994-96 (Table 8). In

order to fill in these missing values, we compared the predicted secchi depth value using the functional

relationship with known TSS values, as well as, the secchi depth of the nearest neighbor where it was

readable. In all cases the “to bottom” readings were replaced with the value of the nearest neighbor

because it was generally the more conservative estimate, although the two estimates were in good

general agreement and substantiated that the secchi depth was indeed greater than the water column

depth.

Analytical Precision

As noted, water samples were collected in duplicate at two sites (three total duplicate samples since one

site was sampled at two depths) on each date. The coefficient of variation was determined for each

duplicate for the following variables: total suspended solids, soluble reactive phosphorus, nitrate, ammonia, silica, particulate silica, particulate organic carbon, dissolved organic carbon, and chlorophyll. The

yearly mean coefficient of variation and the pooled mean for each of these variables is given in Table 9.

Vertical CTD Profiles

Vertical profiles of temperature (C), fluorescence (ug/L), and transmissivity (percent) from the CTD

casts are not presented in this data report but are available electronically from GLERL’s web site at the

address:ftp://ftp.glerl.noaa.gov/publications/tech_reports/glerl-115. Data file units are listed in volts; for

fluorescence the scale is 0-5 volts with 5 volts=30 ug/L, for transmissivity the scale is 0-5 volts with 5
16

Table 9. Yearly and pooled mean coefficients of variation for field replicates collected during 1994 – 1996

for each of the listed variables. Individual values (each n) were derived from duplicate water samples

collected at station 5-1m, station 20-1m, and station 20-8m during each sampling date for that year. In

1996, TDP, SRP, NO3, NH4, SiO2, were only determined on samples collected from station 5-1m, and DOC

measurements were not conducted on any samples. The number of samples used in the computation (N)

denote these difference among parameters.

Year N TSS TP TDP SRP NO3 NH4 SiO2 PSi Cl POC DOC Chl

1994 18 7.9 3.9 12.7 16.3 0.9 10.3 0.6 17.1 0.3 6.2 2.7 4.4

1995 21 5.1 5.3 7.8 6.5 1.8 7.9 1.5 4.1 0.7 7.2 1.9 6.1

1996 21/7 4.4 5.9 4.6 16.9 7.7 15.7 2.1 4.3 0.6 5.1 3.0

1994-96 5.7 5.1 9.2 11.9 2.3 10.0 1.2 9.2 0.5 6.2 2.3 4.5

(N) (60) (60) (46) (46) (46) (46) (46) (46) (46) (60) (39) (60)

Table 8. List of secchi depth transparencies that were reported as “to bottom” and the corresponding

value of the nearest station and the values predicted from the functional relationship between Secchi

depth and total suspended solids. Final values in Appendix I were selected as defined in the text.

Case Year Cruise Station To Bottom Predicted Neighboring Appendix I

Depth(m) Secchi Depth(m) Secchi Depth(M) Secchi Depth (m)

1 1994 941 21 5.0 7.8 6.8 6.8

2 1994 943 21 5.3 8.4 6.5 6.5

3 1995 951 13 3.9 11.1 9.0 9.0

4 1995 951 16 3.8 3.1 3.9 3.9

5 1995 951 19 6.2 7.4 7.8 7.8

6 1995 951 21 5.0 10.7 7.8 7.8

7 1995 952 5 3.2 3.2 5.0 5.0

8 1995 952 19 4.0 6.8 7.5 7.5

9 1995 952 21 5.0 7.9 7.5 7.5

10 1995 953 5 3.4 4.5 4.5 4.5

11 1995 953 13 3.9 6.6 4.5 4.5

12 1995 953 16 3.8 3.0 4.0 4.0

13 1995 953 21 5.0 8.2 6.5 6.5

14 1995 954 21 4.8 5.3 8.3 8.3

15 1995 955 21 4.8 4.4 6.0 6.0

16 1995 957 19 3.4 2.8 4.5 4.5

17 1995 957 21 5.3 6.5 6.0 6.0

18 1996 961 13 3.8 5.4 5.4 5.4

19 1996 961 19 3.2 7.9 5.4 5.4

20 1996 961 21 5.2 9.7 5.4 5.4

21 1996 962 19 3.2 8.1 5.8 5.8

22 1996 962 21 4.1 7.1 5.8 5.8

23 1996 963 13 3.6 5.1 4.1 4.1

24 1996 963 14 3.5 6.8 4.1 4.1

25 1996 963 21 4.8 6.6 7.1 7.1

26 1996 964 14 3.5 4.3 4.1 4.1

27 1996 964 16 3.5 4.8 4.1 4.1

28 1996 964 21 4.5 3.6 7.1 7.1

29 1996 965 5 3.5 4.7 3.6 3.6

30 1996 965 19 3.5 4.4 4.9 4.9

31 1996 965 21 6.0 9.2 7.9 7.9

32 1996 967 13 3.8 5.0 4.1 4.1

33 1996 967 19 3.5 6.4 4.1 4.1
17

volts=100%. The CTD casts are stored as ascii files and are defined by unique filenames denoted as

SBYY_C_ST.txt where YY=year, C= cruise number, and ST=station number. The files are divided into

two directories corresponding to the sampling periods 1991-93 and 1994-96.

Inner Bay Means

Figures 6 gives inner bay and outer bay mean values of selected variables for each cruise in 1994-96. No

interpretations of these data are given in this report.

ACKNOWLEDGMENTS

We thank the management at the NOAA Great Lakes Environmental Research Lab for their support and

encouragement of this project, particularly during the early planning and implementation period. We

also thank W. Burns for his help and cooperation during field operations; the crew of the R/V Shenehon

also for assistance during field operations; the City of East Tawas and the Michigan Department of

Natural Resources for providing an area for our mobile laboratory and dockage of our vessels. We

especially thank the following personnel of NOAA and CILER for their dedication in sample collection,

sample analysis, and data tabulation: T. Bridgeman, J. Cavaletto, W. Faust, G. Gostenik, D. Hartson, J.

Leibig, and K. Weissenfluh.

REFERENCES

APHA. Standard methods for the examination of water and wastewater. 17th edition. American Public

Health Association, Washington, DC. 1268 p. (1990).

Bierman, V. J. Jr., D.M. Dolan, and R. Kasprzyk. Retrospective analysis of the response of Saginaw Bay,

Lake Huron to reductions in phosphorus loadings. Environ. Sci. Technol. 18:23-21 (1984).

Beeton, A.M., S.H. Smith, and F.H. Hooper. Physical limnology of Saginaw Bay, Lake Huron. Great

Lakes Fishery Commission, Technical Report Number 12. 56 p. (1967).

Danek, L.J., and J.H. Saylor. Measurements of the summer currents in Saginaw Bay, Michigan. J. Great

Lakes Res. 3:65-71 (1977).

Davis, C.O., and M.S. Simmons. Water Chemistry and Phytoplankton Field and Laboratory Procedures.

Special Report No. 70, Great Lakes Research Div., Univ. of Michigan, Ann Arbor, MI (1979).

Fahnenstiel, G.L., G.A. Lang, T.F Nalepa, and T.H. Johengen. Effects of zebra mussel (Dreissena

polymorpha) colonization on water quality parameters in Saginaw Bay, Lake Huron. J. Great Lakes Res.

21:435-448 (1995a).

Fahnenstiel, G.L., T.B. Bridgeman, G.A. Lang, M.J. McCormick, and T.F. Nalepa. Phytoplankton

productivity in Saginaw Bay, Lake Huron: effects of zebra mussel (Dreissena polymorpha) colonization.

J. Great Lakes Res. 21:465-475 (1995b).

Johengen, T.H., T.F. Nalepa, G.L. Fahnentiel, and G. Goudy. Nutrient changes in Saginaw Bay, Lake

Huron after the establishment of the zebra mussel Dreissena polymorpha. J. Great Lakes Res. 21: 449-

464 (1995).
18

Krausse, G.L., C.L. Schelske, and C.O. Davis. Comparison of three wet-alkaline methods of digestion of

biogenic silica in water. Freshwater Biol. 13:73-81 (1983).

Menzel, D.W., and N. Corwin. The measurement of total phosphorus in seawater based on the liberation

of organically bound fractions by persulfate oxidation. Limnol. Oceanogr. 10:280-281 (1965).

Nalepa, T.F., G.L. Fahnenstiel, M.J. McCormick, T.H. Johengen, G.A. Lang, J.F. Cavaletto, and G.

Goudy. Physical and chemical variables of Saginaw Bay, Lake Huron in 1991-93. NOAA Technical

Memorandum ERL GLERL-91, Ann Arbor, MI., 78 p. (1996).

Smith, V.E., K.W. Lee, J.C. Filkins, K.W. Hartwell, K.R. Rygwelski, and J.M. Townsend. Survey of

chemical factors in Saginaw Bay (Lake Huron). EPA-600/3-77-125, U.S. Environmental Protection

Agency, Duluth, Minnesota,142 p. (1977).

Strickland, J.D.H., and T.R. Parsons. A Practical Handbook of Seawater Analysis, 2nd ed. Bull. Fish.

Res. Bd. Can. No. 167 (1972)

Wood, L.E. Bottom sediments of Saginaw Bay, Michigan. J. Sediment. Petrol. 34:173-184 (1964).
19

A) Inner Bay

B) Outer Bay

90 120 150 180 210 240 270 300 330

Julian Day

0.0

5.0

10.0

15.0

20.0

25.0

0.0

5.0

10.0

15.0

20.0

25.0

Temperature (

oC)

Figure 6. Mean (+ SE) values of selected physical and chemical variables at sites in the inner bay

(A) and outer bay (B) for all sampling dates in 1994-96.

 =1994 =1995 =1996
20

A) Inner Bay

B) Outer Bay

Secchi Depth (m)

0.0

1.0

2.0

3.0

4.0

5.0

90 120 150 180 210 240 270 300 330

Julian Day

0.0

2.5

5.0

7.5

10.0
21

B) Outer Bay

A) Inner Bay

0.0

0.5

1.0

1.5

2.0

90 120 150 180 210 240 270 300 330

Julian Day

0.0

0.5

1.0

1.5

2.0

KPar (m-1

)
22

A) Inner Bay

B) Outer Bay

0.0

4.0

8.0

12.0

16.0

20.0

Total Suspended Solids (mg/L)

90 120 150 180 210 240 270 300 330

Julian Day

0.0

1.0

2.0

3.0

4.0

5.0
23

A) Inner Bay

B) Outer Bay

0.0

10.0

20.0

30.0

40.0

Total Phosphorus (

μg/L)

90 120 150 180 210 240 270 300 330

Julian Day

0.0

5.0

10.0

15.0
24

A) Inner Bay

B) Outer Bay

90 120 150 180 210 240 270 300 330

Julian Day

0.0

2.0

4.0

6.0

8.0

0.0

2.0

4.0

6.0

8.0

Total Dissolved Phosphorus (

μg/L)
25

A) Inner Bay

B) Outer Bay

0.0

0.5

1.0

1.5

2.0

Soluble Reactive Phosphorus (

μg/L)

90 120 150 180 210 240 270 300 330

Julian Day

0.0

1.0

1.5

2.0

0.5
26

A) Inner Bay

B) Outer Bay

90 120 150 180 210 240 270 300 330

Julian Day

0.0

0.2

0.4

0.6

0.8

1.0

0.0

0.5

1.0

1.5

2.0

2.5

Nitrate (mg/L)
27

A) Inner Bay

B) Outer Bay

90 120 150 180 210 240 270 300 330

Julian Day

0

10

20

30

40

0

10

20

30

40

Ammonium (

μg/L)
28

A) Inner Bay

B) Outer Bay

Silica (mg/L)

0.0

1.0

2.0

3.0

90 120 150 180 210 240 270 300 330

Julian Day

0.0

0.5

1.0

1.5

2.0
29

B) Outer Bay

90 120 150 180 210 240 270 300 330

Julian Day

0.0

0.5

1.0

1.5

2.0

Particulate Silica (mg/L)

0.0

0.5

1.0

1.5

2.0

A) Inner Bay
30

B) Outer Bay

Chloride (mg/L)

A) Inner Bay

5.0

10.0

15.0

20.0

25.0

90 120 150 180 210 240 270 300 330

Julian Day

5.0

10.0

15.0

20.0
31

A) Inner Bay

B) Outer Bay

0.0

1.0

2.0

3.0

Particulate Organic Carbon (mg/L)

90 120 150 180 210 240 270 300 330

Julian Day

0.0

0.5

1.0

1.5
32

A) Inner Bay

B) Outer Bay

90 120 150 180 210 240 270 300 330

Julian Day

1.0

2.0

3.0

4.0

5.0

Dissolved Organic Carbon (mg/L)

1.0

2.0

3.0

4.0

5.0
33

A) Inner Bay

B) Outer Bay

0.0

5.0

10.0

15.0

20.0

90 120 150 180 210 240 270 300 330

Julian Day

0.0

2.0

4.0

6.0

8.0

Chlorophyll (

μg/L)
34

Appendix 1

Values of all physical and chemical variables

collected in Saginaw Bay during 1994–1996.

Missing data are represented by “.”

Data are also contained in both ASCII and MS Excel files at:

ftp://ftp.glerl.noaa.gov/publications/tech_reports/glerl-115.
35

Sampling Dates Station Depth Temp Secchi KPAR TSS TP TDP SRP NIT AMM SILICA PSI CL POC DOC CHL

Cruise Year Month Day ID (m) (oC) (m) ( /m) (mg/L) (ug/L) (ug/L) (ug/L) (mg/L) (ug/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (ug/L)

941 1994 Apr 20 4 1 6.5 1.5 . 6.5 26.4 6.0 1.8 0.56 5.3 1.41 1.12 22.8 1.28 3.64 18.98

941 1994 Apr 20 5 1 7.5 1.8 . 4.6 19.8 8.9 0.7 0.80 9.8 1.60 0.70 26.5 0.70 4.90 8.32

941 1994 Apr 20 7 1 6.0 2.0 . 3.8 14.4 3.8 0.5 0.43 3.3 1.80 0.61 21.1 0.92 3.61 10.93

941 1994 Apr 20 10 1 5.0 . . 3.8 12.2 2.8 0.3 0.37 2.9 1.56 0.69 17.7 0.71 3.05 8.06

941 1994 Apr 20 10 6 . . . 4.0 12.1 2.9 0.3 0.37 2.5 1.56 0.69 17.7 0.64 2.91 8.05

941 1994 Apr 20 11 1 4.7 4.5 . 3.1 7.7 2.3 0.3 0.37 17.8 1.75 0.31 12.5 0.47 2.49 1.69

941 1994 Apr 20 11 5 4.5 . . 3.2 7.6 1.9 0.3 0.37 17.0 1.63 0.40 12.9 0.40 2.44 1.87

941 1994 Apr 20 13 1 7.8 2.8 . 1.5 9.4 7.6 0.3 0.58 5.7 0.91 0.15 24.1 0.40 3.82 2.52

941 1994 Apr 20 14 1 9.0 3.0 . 2.3 12.4 4.3 1.2 0.30 28.0 0.72 0.40 15.5 0.41 3.14 3.02

941 1994 Apr 20 16 1 9.5 1.5 . 5.1 19.4 4.8 0.5 0.86 14.7 2.13 0.96 32.6 0.78 5.26 8.78

941 1994 Apr 20 19 1 4.0 4.8 . 0.9 4.1 1.6 0.2 0.30 6.5 1.41 0.35 7.3 0.24 2.03 1.40

941 1994 Apr 20 20 1 3.0 6.8 . 0.9 4.4 1.4 0.2 0.30 3.7 1.50 0.30 6.3 0.30 1.80 2.37

941 1994 Apr 20 20 8 2.8 . . 1.0 4.2 1.4 0.3 0.30 3.7 1.50 0.30 6.2 0.30 2.00 2.47

941 1994 Apr 20 21 1 6.0 6.8 . 0.4 3.5 1.4 0.2 0.34 11.5 1.43 0.09 11.8 0.15 2.33 0.37

941 1994 Apr 20 23 1 3.0 6.0 . 1.0 4.4 1.3 0.2 0.33 2.9 1.59 0.26 6.6 0.30 1.88 2.23

941 1994 Apr 20 23 14 3.5 . . 1.2 4.6 1.4 0.2 0.33 3.7 1.75 0.29 6.6 0.27 1.78 2.44

941 1994 Apr 20 24 1 5.5 11.0 . 0.5 3.5 1.4 0.1 0.34 13.1 1.28 0.10 9.1 0.17 2.04 0.38

941 1994 Apr 20 24 6 . . . 0.6 4.4 1.6 0.3 0.37 13.9 1.26 0.10 9.2 0.14 2.02 0.43

942 1994 Jun 9 4 1 19.2 . . 15.4 36.6 6.5 3.1 0.45 57.8 0.82 1.81 30.7 0.91 4.43 2.97

942 1994 Jun 9 5 1 18.8 3.5 . 1.4 9.5 3.7 0.6 0.30 23.4 0.60 0.30 20.3 0.30 3.90 0.41

942 1994 Jun 9 7 1 . 0.5 . 18.4 33.4 3.2 0.7 0.31 13.5 0.47 3.19 20.8 1.32 3.84 6.45

942 1994 Jun 6 10 1 16.6 3.5 . 1.4 6.0 1.9 0.5 0.23 9.1 0.72 0.35 10.8 0.34 2.67 2.39

942 1994 Jun 6 10 6 16.4 . . 1.5 5.7 1.9 0.3 0.23 11.3 0.72 0.37 10.8 0.38 2.75 2.18

942 1994 Jun 6 11 1 14.8 5.0 . 0.6 4.8 1.3 0.4 0.24 14.2 0.93 0.31 8.2 0.27 2.34 1.36

942 1994 Jun 6 11 5 14.5 . . 1.0 4.0 1.3 0.4 0.25 14.2 0.93 0.29 8.2 0.26 2.21 1.60

942 1994 Jun 6 13 1 . 3.2 . 2.8 7.3 2.6 0.5 0.31 26.0 0.33 0.51 16.3 0.35 3.08 0.75

942 1994 Jun 9 14 1 19.7 . . 1.1 10.6 4.1 0.6 0.81 11.9 0.89 0.16 34.6 0.41 4.98 1.80

942 1994 Jun 9 16 1 18.2 . . 0.5 5.4 2.3 0.6 0.32 41.5 0.37 0.25 16.7 0.24 3.13 0.40

942 1994 Jun 10 19 1 15.7 6.4 . 0.6 3.7 1.2 0.3 0.27 20.9 0.82 0.24 9.4 0.18 2.38 0.75

942 1994 Jun 10 20 1 12.9 7.6 . 0.4 2.3 0.8 0.4 0.28 8.2 1.17 0.17 5.9 0.19 1.89 1.05

942 1994 Jun 10 20 8 12.1 . . 0.7 2.7 0.8 0.4 0.28 6.3 1.17 0.23 5.9 0.25 1.93 1.67

942 1994 Jun 10 21 1 15.9 5.1 . 0.3 3.8 1.6 0.4 0.25 14.5 1.03 0.11 6.0 0.19 2.13 0.61

942 1994 Jun 10 23 1 10.4 7.3 . 0.4 2.1 1.2 0.4 0.30 8.2 1.31 0.14 6.0 0.19 1.89 0.92

942 1994 Jun 10 23 14 10.4 . . 0.8 2.9 2.1 0.4 0.31 7.9 1.31 0.27 6.0 0.31 1.88 3.20

942 1994 Jun 10 24 1 15.2 6.8 . 0.7 2.1 1.2 0.4 0.31 11.1 1.00 0.20 8.4 0.19 2.34 0.92

942 1994 Jun 10 24 6 14.5 . . 0.7 2.3 1.2 0.4 0.31 12.4 1.00 0.26 8.3 0.22 2.34 1.14

943 1994 Jul 13 4 1 22.5 1.5 . 5.8 26.0 3.0 1.4 0.23 10.0 1.33 0.70 18.7 1.14 4.22 10.42

943 1994 Jul 13 5 1 23.0 2.0 . 4.0 21.4 4.7 1.1 1.50 4.5 2.00 0.30 28.2 1.30 5.50 8.26

943 1994 Jul 13 7 1 22.0 2.0 . 4.0 15.4 2.4 0.9 0.18 6.5 1.06 0.63 13.0 0.77 3.66 5.74

943 1994 Jul 11 10 1 22.0 1.5 . 3.7 15.0 3.0 1.1 0.21 4.5 0.92 0.73 13.5 0.97 4.10 6.57

943 1994 Jul 11 10 6 22.0 . . 3.6 16.0 2.4 1.0 0.22 5.2 0.87 0.69 12.7 0.93 3.85 6.04

943 1994 Jul 11 11 1 21.5 1.8 . 5.2 16.6 2.0 1.0 0.25 4.9 0.96 0.74 12.7 1.30 3.90 7.75

943 1994 Jul 11 11 5 . . . 4.5 17.0 1.8 0.9 0.23 6.2 0.96 0.76 12.2 1.16 3.88 6.97

943 1994 Jul 13 13 1 22.0 1.8 . 7.5 22.3 2.8 0.9 0.15 4.6 0.45 1.10 16.5 1.87 3.89 12.25

943 1994 Jul 13 14 1 23.0 2.0 . 5.3 22.6 4.0 1.0 1.03 15.9 1.37 0.83 21.7 0.97 4.86 6.44

943 1994 Jul 13 16 1 22.0 1.5 . 8.2 22.6 3.6 0.9 0.51 4.6 0.56 1.04 19.0 1.62 4.46 9.70

943 1994 Jul 12 19 1 19.5 4.3 . 1.3 8.0 1.8 0.6 0.28 4.3 0.81 0.37 7.4 0.52 3.13 1.71

943 1994 Jul 12 20 1 17.8 6.5 . 0.6 3.6 2.4 0.5 0.30 4.5 0.90 0.20 6.0 0.40 2.70 0.91

943 1994 Jul 12 20 8 18.0 . . 0.5 4.1 1.3 0.5 0.30 3.7 1.00 0.20 6.0 0.30 2.80 0.91

943 1994 Jul 12 21 1 18.0 6.5 . 0.4 5.0 1.1 0.7 0.25 7.0 1.11 0.14 6.0 0.30 3.00 0.62

943 1994 Jul 13 23 1 17.0 9.5 . 0.3 3.9 1.1 0.6 0.28 4.8 1.02 0.13 5.6 0.22 2.66 0.69

943 1994 Jul 13 23 14 . . . 0.4 3.9 1.1 0.5 0.28 4.2 1.02 0.15 5.6 0.21 2.67 0.69

943 1994 Jul 13 24 1 20.1 1.5 . 7.4 19.3 2.0 1.4 0.87 9.3 0.34 0.74 20.4 2.06 4.75 12.35

943 1994 Jul 13 24 6 . . . 6.3 19.9 2.4 0.7 0.89 8.8 0.34 0.73 20.6 2.08 4.31 11.63

944 1994 Aug 8 4 1 21.5 0.9 . 10.7 43.2 4.0 1.2 0.23 9.2 1.66 1.14 17.5 2.48 4.39 26.69

944 1994 Aug 8 5 1 21.0 1.2 . 9.3 25.7 2.7 0.7 0.10 6.9 1.60 0.80 15.1 2.60 3.80 15.59

944 1994 Aug 8 7 1 21.0 1.8 . 4.1 16.3 5.7 0.7 0.19 11.1 1.02 0.51 12.1 0.97 3.16 5.92

944 1994 Aug 10 10 1 19.0 2.8 . 2.6 11.7 3.0 0.7 0.21 17.2 1.05 0.65 11.4 0.86 3.08 5.23

944 1994 Aug 10 10 6 19.0 . . 2.7 12.0 2.1 1.0 0.22 18.0 1.07 0.65 10.9 0.86 3.10 5.63

944 1994 Aug 8 11 1 19.0 2.8 . 1.9 11.3 2.4 0.7 0.30 12.6 0.82 0.59 8.9 0.63 2.67 3.77

944 1994 Aug 8 11 5 19.5 . . 1.9 10.6 1.9 0.6 0.30 10.7 0.80 0.62 8.9 0.90 2.66 3.51

944 1994 Aug 8 13 1 21.0 1.9 . 6.5 13.6 1.9 0.5 0.21 7.6 0.75 1.07 12.1 1.44 3.25 5.87

944 1994 Aug 8 14 1 21.5 0.8 . 15.8 41.4 3.5 0.8 0.62 7.2 1.46 0.82 32.4 4.55 6.74 38.76

944 1994 Aug 8 16 1 21.0 1.9 . 4.5 17.0 2.1 0.5 0.22 7.6 0.94 0.69 12.1 1.31 3.10 7.03

944 1994 Aug 10 19 1 19.0 3.5 . 2.4 9.4 1.9 0.5 0.31 13.4 0.58 0.60 8.9 0.78 2.97 3.02

944 1994 Aug 10 20 1 18.8 4.5 . 1.0 4.2 1.1 0.3 0.30 9.7 0.50 0.50 7.7 0.40 2.70 1.38

944 1994 Aug 10 20 8 . . . 0.9 4.5 1.2 0.5 0.30 12.4 0.60 0.50 7.7 0.30 2.60 1.50

944 1994 Aug 10 21 1 18.5 5.0 . 0.8 6.9 1.1 0.7 0.24 10.3 0.68 0.34 7.1 0.45 2.88 2.04

944 1994 Aug 10 23 1 19 4.5 . 0.7 3.5 1.1 0.5 0.32 9.2 0.61 0.43 7.3 0.30 . 1.29

944 1994 Aug 10 23 14 18 . . 0.7 3.7 1.0 0.5 0.31 11.1 0.57 0.48 7.1 0.27 . 1.22

944 1994 Aug 10 24 1 19.0 2.3 . 2.8 8.1 2.4 0.6 0.46 11.8 0.84 0.60 10.1 1.10 3.14 4.27

944 1994 Aug 10 24 6 . . . 2.6 9.0 1.3 0.6 0.45 11.1 0.84 0.69 10.0 1.01 3.02 4.30

945 1994 Sep 8 4 1 19.5 1.2 . 7.9 65.1 3.4 0.9 0.01 9.8 1.25 0.87 12.4 2.09 2.79 17.01

945 1994 Sep 8 5 1 19.0 0.9 . 10.2 58.1 2.8 0.6 0.01 10.4 0.90 1.00 11.7 2.80 2.60 10.90

945 1994 Sep 8 7 1 20.0 1.5 . 5.6 56.0 3.0 0.7 0.01 7.3 1.21 0.85 11.3 1.82 2.69 13.66

945 1994 Sep 8 10 1 19.0 2.0 . 4.9 16.0 2.2 0.7 0.13 11.9 1.10 0.87 9.8 1.08 2.45 7.19

945 1994 Sep 8 10 6 . . . 5.3 16.9 2.1 0.7 0.15 15.0 1.03 1.00 9.8 1.25 2.37 6.60

945 1994 Sep 9 11 1 19.0 2.2 . 3.8 13.5 1.6 0.6 0.13 6.3 1.07 0.79 9.7 1.20 2.24 6.50
36

Sampling Dates Station Depth Temp Secchi KPAR TSS TP TDP SRP NIT AMM SILICA PSI CL POC DOC CHL

Cruise Year Month Day ID (m) (oC) (m) ( /m) (mg/L) (ug/L) (ug/L) (ug/L) (mg/L) (ug/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (ug/L)

945 1994 Sep 9 11 5 . . . 4.2 13.6 1.8 0.6 0.13 7.8 0.92 0.87 9.9 1.18 2.27 6.71

945 1994 Sep 8 13 1 19.0 2.0 . 4.8 14.0 1.8 0.3 0.10 8.3 0.89 0.87 10.1 1.34 2.65 6.83

945 1994 Sep 8 14 1 20.0 0.8 . 20.5 40.5 4.0 0.7 0.01 11.4 1.25 1.51 18.7 5.03 3.71 25.52

945 1994 Sep 8 16 1 19.0 1.3 . 10.3 21.3 2.1 0.6 0.07 12.4 0.76 1.28 11.4 2.27 2.74 11.69

945 1994 Sep 9 19 1 19.0 3.4 . 2.2 6.7 1.7 0.7 0.23 10.9 0.52 0.64 8.4 0.69 2.27 3.24

945 1994 Sep 9 20 1 18.0 5.8 . 0.8 4.0 1.4 0.5 0.20 11.4 0.60 0.30 6.9 0.30 1.9 1.36

945 1994 Sep 9 20 8 . . . 1.0 3.9 1.5 0.4 0.20 13.4 0.60 0.30 6.9 0.40 1.9 1.61

945 1994 Sep 9 21 1 18.5 3.0 . 2.5 6.7 1.4 0.6 0.15 9.8 0.56 0.68 7.9 0.67 2.25 4.09

945 1994 Sep 9 23 1 18.0 6.6 . 0.9 4.7 1.4 0.4 0.24 11.4 0.56 0.39 7.3 0.45 1.90 2.84

945 1994 Sep 9 23 14 . . . 0.8 4.1 1.4 0.9 0.22 14.5 0.56 0.38 7.1 0.37 1.93 2.05

945 1994 Sep 9 24 1 19.0 1.8 . 4.9 11.7 1.9 0.7 0.20 16.0 0.39 1.01 11.8 1.65 2.82 8.07

945 1994 Sep 9 24 6 . . . 5.5 11.3 1.8 0.7 0.20 15.0 0.39 1.04 12.0 1.60 2.83 7.67

946 1994 Oct 17 4 1 14.0 1.0 . 13.7 40.7 3.7 1.2 0.17 8.6 1.72 3.28 23.5 1.88 4.14 15.03

946 1994 Oct 17 5 1 13.5 . . 6.4 18.8 2.7 0.7 0.01 8.9 1.50 1.40 13.5 1.40 3.10 3.34

946 1994 Oct 17 7 1 14.0 . . 7.4 26.3 3.3 0.8 0.04 7.1 1.08 2.63 13.0 1.35 2.97 9.82

946 1994 Oct 17 10 1 15.0 1.5 . 5.7 23.1 3.7 1.0 0.04 7.1 1.53 0.87 11.4 1.29 2.87 9.27

946 1994 Oct 17 10 6 . . . 6.9 25.2 3.5 0.8 0.04 7.6 1.58 1.22 11.4 1.56 2.84 12.72

946 1994 Oct 19 11 1 14.0 2.0 . 3.0 12.3 2.0 0.7 0.14 12.7 1.46 0.52 8.7 0.69 2.37 4.36

946 1994 Oct 19 11 5 . . . 3.0 10.8 1.9 0.5 0.14 12.2 1.46 0.53 8.7 0.74 2.29 4.37

946 1994 Oct 19 13 1 14.0 1.5 . 6.5 14.3 1.5 0.4 0.07 9.2 0.19 1.49 9.0 1.77 2.37 7.99

946 1994 Oct 17 14 1 14.0 3.0 . 1.7 8.5 2.3 0.5 0.09 7.1 1.08 0.53 9.4 0.59 2.61 2.58

946 1994 Oct 17 16 1 14.0 2.3 . 3.3 10.3 1.6 0.1 0.04 1.5 0.13 0.80 9.3 0.98 2.47 4.25

946 1994 Oct 19 19 1 14.0 2.5 . 2.8 8.7 1.7 0.5 0.15 6.6 0.92 0.60 7.9 0.92 2.18 4.56

946 1994 Oct 19 20 1 14.0 5.0 . 0.8 4.9 1.5 0.7 0.20 6.6 1.00 0.30 6.6 0.40 2.0 2.54

946 1994 Oct 19 20 8 . . . 1.0 5.5 1.5 0.7 0.20 6.9 1.00 0.30 6.7 0.30 1.9 2.66

946 1994 Oct 19 21 1 15.0 3.5 . 2.5 7.3 1.3 0.5 0.17 11.7 0.90 0.64 7.7 0.72 2.25 3.28

946 1994 Oct 19 23 1 15.0 7.0 . 0.3 4.1 1.3 0.4 0.26 8.1 0.79 0.18 6.1 0.25 1.83 2.13

946 1994 Oct 19 23 14 . . . 0.4 3.9 1.3 0.3 0.26 8.1 0.83 0.19 6.3 0.35 1.84 1.98

946 1994 Oct 19 24 1 14.0 4.0 . 1.3 4.9 1.5 0.7 0.23 13.2 0.87 0.27 7.3 0.41 1.95 2.10

946 1994 Oct 19 24 6 . . . 1.2 5.1 1.3 0.5 0.23 14.2 0.87 0.27 7.3 0.44 2.04 2.02

951 1995 May 2 4 1 10.0 0.8 . 12.6 18.4 4.0 2.1 1.21 25.0 1.07 1.74 25.8 1.20 5.54 5.08

951 1995 May 2 5 1 8.5 1.8 . 6.1 5.8 1.6 0.3 0.50 14.6 0.29 1.28 17.9 0.75 2.95 3.68

951 1995 May 2 7 1 7.5 1.0 . 11.9 12.5 1.5 0.3 0.41 8.9 0.57 2.07 18.2 1.45 3.09 11.41

951 1995 May 2 10 1 7.0 1.8 . 6.1 7.7 1.7 0.5 0.57 7.4 0.61 1.30 19.0 0.90 3.23 7.75

951 1995 May 2 10 6 . . . 5.9 7.2 1.7 0.5 0.58 7.4 0.61 1.20 19.0 0.92 3.22 7.73

951 1995 May 2 11 1 7.0 3.8 . 1.6 3.5 1.3 0.3 0.47 19.8 1.26 0.40 14.6 0.33 2.57 1.50

951 1995 May 2 11 5 . . . 1.5 3.4 1.3 0.3 0.48 20.3 1.31 0.37 14.6 0.31 2.66 1.56

951 1995 May 2 13 1 8.0 9.0 . 0.2 1.8 1.0 0.3 0.38 20.3 1.31 0.08 10.2 0.18 2.87 0.36

951 1995 May 2 14 1 9.5 1.3 . 11.1 7.9 1.5 0.3 0.63 13.1 0.10 1.34 18.3 0.98 2.16 4.12

951 1995 May 2 16 1 7.5 3.9 . 2.0 3.0 1.3 0.5 0.42 21.4 1.31 0.33 10.4 0.32 2.16 0.44

951 1995 May 3 19 1 6.5 7.8 . 0.5 1.9 1.0 0.4 0.33 11.0 1.44 0.20 10.5 0.16 1.90 0.78

951 1995 May 3 20 1 6.5 7.8 . 0.8 2.1 0.9 0.3 0.32 6.4 1.58 0.18 6.6 0.22 1.82 1.02

951 1995 May 3 20 8 . . . 0.8 2.1 1.0 0.3 0.33 6.5 1.58 0.17 6.7 0.24 1.86 1.17

951 1995 May 3 21 1 8.5 7.8 . 0.3 1.8 1.0 0.3 0.27 12.8 1.77 0.05 6.8 0.08 2.13 0.14

951 1995 May 3 23 1 3.5 8.5 . 0.6 2.2 1.0 0.2 0.32 6.6 1.68 0.19 6.4 0.24 1.69 2.00

951 1995 May 3 23 14 . . . 0.8 3.2 1.0 0.2 0.34 4.3 1.72 0.22 6.4 0.23 1.58 2.31

951 1995 May 3 24 1 7.5 9.0 . 0.8 2.4 1.1 0.3 0.40 17.0 1.07 0.31 11.1 0.17 2.08 0.64

951 1995 May 3 24 6 . . . 0.9 2.4 1.0 0.3 0.42 17.5 1.07 0.31 10.8 0.19 2.11 0.56

952 1995 May 17 4 1 14.5 1.5 . 8.5 10.2 2.2 0.3 0.54 8.9 0.27 1.61 20.5 1.09 3.21 10.51

952 1995 May 17 5 1 16.0 5.0 . 1.9 5.1 2.1 0.3 0.48 33.4 0.22 0.33 19.3 0.32 3.27 0.57

952 1995 May 17 7 1 13.0 2.0 . 5.9 7.9 2.2 0.3 0.43 7.2 0.22 1.24 19.8 0.93 3.12 0.89

952 1995 May 17 10 1 13.0 5.0 . 1.4 4.4 1.8 0.2 0.41 12.8 0.85 0.34 13.3 0.28 2.49 1.59

952 1995 May 17 10 6 . . . 1.5 3.5 1.7 0.4 0.40 13.9 0.94 0.34 13.0 0.36 2.45 1.54

952 1995 May 17 11 1 13.0 5.0 . 1.0 2.7 1.5 0.2 0.36 15.3 1.13 0.24 11.1 0.29 2.22 1.08

952 1995 May 17 11 5 . . . 1.2 2.5 1.5 0.3 0.35 14.2 1.23 0.24 10.4 0.27 2.11 1.15

952 1995 May 17 13 1 15.0 2.3 . 5.7 4.5 1.7 0.3 0.35 19.8 0.08 1.07 13.9 0.45 2.27 1.19

952 1995 May 17 14 1 14.0 2.5 . 6.0 5.9 2.4 0.3 0.79 36.9 0.17 0.76 24.7 0.52 3.82 1.47

952 1995 May 17 16 1 15.0 3.0 . 3.5 4.7 2.3 0.3 0.66 28.7 0.13 0.56 19.3 0.44 3.00 0.99

952 1995 May 18 19 1 13.5 7.5 . 0.5 2.7 1.8 0.3 0.41 33.2 0.51 0.20 13.6 0.15 2.36 0.33

952 1995 May 18 20 1 11.0 7.5 . 0.7 2.2 1.5 0.2 0.35 14.9 1.06 0.22 10.8 0.24 2.07 0.98

952 1995 May 18 20 8 . . . 0.7 2.2 1.5 0.2 0.34 12.1 1.13 0.24 10.2 0.24 1.99 1.12

952 1995 May 18 21 1 14.0 7.5 . 0.4 1.7 1.2 0.2 0.23 17.3 1.52 0.08 6.4 0.11 1.90 0.15

952 1995 May 18 23 1 7.0 9.0 . 0.6 1.8 1.2 0.2 0.30 4.9 1.57 0.17 6.2 0.25 1.51 1.44

952 1995 May 18 23 14 . . . 0.8 2.0 1.1 0.3 0.30 3.8 1.57 0.22 6.2 0.32 1.47 1.86

952 1995 May 18 24 1 14.0 5.3 . 1.4 2.8 1.5 0.3 0.43 24.8 0.27 0.45 13.3 0.34 2.16 1.07

952 1995 May 18 24 6 . . . 1.6 2.9 1.5 0.3 0.41 24.3 0.41 0.48 12.3 0.39 2.11 1.12

953 1995 Jun 12 4 1 19.5 1.3 . 7.9 17.4 4.0 0.5 0.37 7.3 0.80 0.88 24.4 1.30 3.81 9.81

953 1995 Jun 12 5 1 19.0 4.5 . 1.1 5.7 2.9 0.3 0.34 20.8 0.46 0.13 19.3 0.35 3.57 0.84

953 1995 Jun 12 7 1 20.0 1.3 . 9.3 17.6 4.2 1.0 0.36 28.0 0.75 1.42 20.5 1.16 3.43 5.71

953 1995 Jun 12 10 1 18.0 1.5 . 7.6 12.0 3.0 0.9 0.42 29.8 0.75 1.31 18.3 0.73 3.11 3.75

953 1995 Jun 12 10 6 . . . 9.0 12.4 2.9 1.0 0.43 34.3 0.70 1.32 18.7 0.83 3.25 3.29

953 1995 Jun 12 11 1 18.0 4.5 . 1.6 4.2 2.2 0.3 0.37 11.8 0.84 0.37 12.6 0.34 2.57 1.22

953 1995 Jun 12 11 5 . . . 2.9 5.9 2.2 0.3 0.39 10.9 0.70 0.62 14.3 0.56 2.73 2.30

953 1995 Jun 12 13 1 17.5 4.5 . 0.6 3.1 1.9 0.4 0.36 29.8 0.84 0.19 11.6 0.24 2.39 0.48

953 1995 Jun 12 14 1 20.0 2.5 . 3.8 6.8 2.6 0.4 0.56 7.3 0.51 0.51 20.5 0.78 3.17 3.10

953 1995 Jun 12 16 1 19.0 4.0 . 2.1 5.1 2.2 0.3 0.38 18.1 0.56 0.63 13.1 0.45 2.43 1.74

953 1995 Jun 13 19 1 16.0 4.0 . 1.2 3.3 2.0 0.3 0.35 16.3 0.94 0.28 11.0 0.30 2.34 1.59

953 1995 Jun 13 20 1 15.0 6.5 . 0.5 2.0 1.7 0.2 0.30 14.5 1.37 0.13 7.1 0.26 1.94 0.46
37

Sampling Dates Station Depth Temp Secchi KPAR TSS TP TDP SRP NIT AMM SILICA PSI CL POC DOC CHL

Cruise Year Month Day ID (m) (oC) (m) ( /m) (mg/L) (ug/L) (ug/L) (ug/L) (mg/L) (ug/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (ug/L)

953 1995 Jun 13 20 8 . . . 0.8 2.2 1.9 0.2 0.31 11.4 1.34 0.24 6.8 0.27 1.84 0.85

953 1995 Jun 13 21 1 16.0 6.5 . 0.4 1.8 1.6 0.3 0.29 17.2 1.32 0.10 7.0 0.18 2.00 0.43

953 1995 Jun 13 23 1 10.0 8.0 . 0.5 1.7 1.5 0.3 0.35 7.3 1.56 0.13 6.3 0.16 1.69 0.83

953 1995 Jun 13 23 14 . . . 0.8 2.1 1.7 0.3 0.35 9.1 1.56 0.23 6.3 0.27 1.64 1.84

953 1995 Jun 13 24 1 16.0 4.0 . 1.8 3.0 1.6 0.3 0.37 19.9 0.84 0.45 9.7 0.39 2.09 1.31

953 1995 Jun 13 24 6 . . . 1.8 3.0 1.9 0.2 0.38 19.9 0.84 0.45 9.7 0.32 2.07 1.23

954 1995 Jul 17 4 1 23.0 1.2 . 7.3 15.8 2.5 0.3 0.07 6.1 3.63 0.45 17.9 2.16 3.11 11.11

954 1995 Jul 19 5 1 24.0 1.3 . 8.8 11.2 1.6 0.2 0.03 5.7 3.21 0.38 19.4 2.82 3.44 13.01

954 1995 Jul 17 7 1 23.5 1.0 . 4.9 10.7 2.9 0.2 0.09 6.8 3.22 0.31 16.9 1.78 3.00 7.99

954 1995 Jul 17 10 1 21.0 2.0 . 4.5 7.0 2.4 0.2 0.11 7.6 2.10 0.40 14.6 1.48 3.08 6.11

954 1995 Jul 17 10 6 . . . 4.5 7.0 2.5 0.2 0.13 6.8 2.00 0.41 14.3 1.67 2.80 5.70

954 1995 Jul 19 11 1 . 3.0 . 2.2 4.1 1.8 0.1 0.22 9.1 1.42 0.44 9.7 0.70 2.28 2.83

954 1995 Jul 19 11 5 . . . 2.2 4.4 1.5 0.1 0.21 11.3 1.39 0.41 9.6 0.65 2.42 2.72

954 1995 Jul 17 13 1 23.5 0.8 . 14.0 13.2 2.4 0.2 0.02 5.3 2.07 0.51 20.5 3.56 3.66 14.24

954 1995 Jul 17 14 1 25.0 1.5 . 7.9 14.9 3.1 0.2 0.08 6.1 3.12 0.42 17.9 2.43 3.28 13.00

954 1995 Jul 17 16 1 24.0 1.3 . 12.4 12.6 2.5 0.2 0.04 8.3 2.27 0.45 19.6 2.98 3.43 12.02

954 1995 Jul 19 19 1 20.0 2.0 . 3.8 5.9 2.0 0.1 0.16 8.3 1.56 0.44 12.2 1.14 2.55 5.50

954 1995 Jul 19 20 1 19.0 8.3 . 0.7 2.2 1.4 0.1 0.28 6.5 1.15 0.28 7.4 0.25 2.00 0.89

954 1995 Jul 19 20 8 . . . 0.8 2.6 1.4 0.1 0.29 6.8 1.18 0.32 7.2 0.27 1.93 1.03

954 1995 Jul 19 21 1 17.0 8.3 . 0.8 2.1 1.5 0.1 0.27 21.7 1.29 0.13 6.9 0.15 1.99 0.26

954 1995 Jul 19 23 1 . . . . . . . . . . . . . . .

954 1995 Jul 19 23 14 . . . . . . . . . . . . . . .

954 1995 Jul 19 24 1 19.0 2.5 . 3.4 5.2 1.6 0.1 0.16 6.1 1.46 0.51 11.6 1.07 2.38 5.43

954 1995 Jul 19 24 6 . . . 3.2 6.3 1.6 0.1 0.16 6.1 1.49 0.53 11.6 0.99 2.62 5.19

955 1995 Aug 22 4 1 25.0 0.8 . 14.5 43.6 5.1 1.5 0.03 9.7 3.11 1.03 23.8 2.34 3.79 15.36

955 1995 Aug 22 5 1 24.0 1.0 . 11.6 22.4 3.1 0.9 0.04 7.0 2.78 0.74 15.1 2.91 3.36 7.64

955 1995 Aug 22 7 1 . 1.0 . 7.3 27.1 6.2 1.5 0.03 33.3 4.30 0.65 12.9 1.15 2.78 6.62

955 1995 Aug 21 10 1 24.0 2.3 . 3.7 9.8 2.7 0.6 0.03 9.7 1.12 0.62 12.5 1.14 2.80 6.00

955 1995 Aug 21 10 6 . . . 3.5 9.8 2.7 0.5 0.03 8.1 1.12 0.63 12.5 1.12 2.85 5.85

955 1995 Aug 22 11 1 23.0 2.5 . 3.4 9.4 2.7 0.9 0.03 11.3 1.45 0.55 12.2 0.92 2.85 4.76

955 1995 Aug 22 11 5 . . . 3.5 9.6 2.7 0.7 0.03 12.9 1.45 0.56 12.2 0.88 2.80 5.49

955 1995 Aug 21 13 1 24.0 1.8 . 6.4 11.2 2.7 0.9 0.04 9.7 1.39 0.76 12.3 1.61 2.72 6.48

955 1995 Aug 21 14 1 25.0 1.3 . 9.4 14.9 2.1 0.7 0.03 7.4 1.16 1.21 12.5 1.91 2.87 6.16

955 1995 Aug 21 16 1 24.0 1.0 . 10.2 16.0 2.7 0.7 0.03 6.6 1.42 1.16 12.5 2.89 2.83 10.29

955 1995 Aug 22 19 1 23.0 3.0 . 3.0 7.3 1.8 0.5 0.26 18.4 1.02 0.47 7.7 0.62 2.16 2.25

955 1995 Aug 22 20 1 23.0 6.0 . 0.8 4.8 2.0 0.5 0.27 9.3 0.97 0.22 7.4 0.34 2.06 1.15

955 1995 Aug 22 20 8 . . . 0.8 3.9 1.8 0.5 0.27 8.9 0.94 0.22 7.4 0.33 2.07 1.19

955 1995 Aug 22 21 1 22.0 6.0 . 1.1 4.8 2.7 0.7 0.21 15.2 1.29 0.27 7.8 0.37 2.16 1.21

955 1995 Aug 22 23 1 23.0 9.0 . 0.4 3.0 1.6 0.5 0.31 8.1 0.96 0.15 6.5 0.15 1.97 0.53

955 1995 Aug 22 23 14 . . . 0.5 3.2 1.8 0.3 0.31 8.1 0.92 0.16 6.5 0.22 2.10 0.74

955 1995 Aug 22 24 1 24.0 2.3 . 4.5 8.9 2.4 0.9 0.08 6.6 1.16 0.65 11.0 1.27 2.50 5.89

955 1995 Aug 22 24 6 . . . 4.6 9.4 2.4 0.5 0.09 5.0 1.19 0.70 10.8 1.24 2.48 5.60

956 1995 Sep 12 4 1 . 0.8 . 11.3 37.4 6.4 1.1 0.03 7.6 2.34 1.01 23.6 1.97 3.86 9.11

956 1995 Sep 12 5 1 . 1.3 . 7.5 19.9 3.9 1.0 0.03 5.1 3.45 0.50 16.4 2.07 3.48 3.74

956 1995 Sep 12 7 1 21.0 1.0 . 8.4 33.3 6.4 1.1 0.03 4.7 2.49 1.04 22.1 1.68 3.64 6.08

956 1995 Sep 12 10 1 20.5 . . 4.5 21.4 5.3 0.7 0.02 3.2 2.05 0.58 12.9 1.19 2.90 5.12

956 1995 Sep 12 10 6 . . . 7.4 25.7 7.0 0.7 0.02 2.8 2.09 1.57 12.8 1.70 2.89 10.57

956 1995 Sep 12 11 1 19.0 1.5 . 7.3 22.1 4.4 0.5 0.05 11.3 2.38 1.24 10.9 1.48 2.83 9.80

956 1995 Sep 12 11 5 . . . 7.0 21.1 4.7 0.7 0.04 9.1 2.31 1.27 10.9 1.38 2.64 9.18

956 1995 Sep 12 13 1 19.0 1.5 . 5.8 13.0 2.7 0.5 0.03 3.2 1.55 0.83 10.6 1.49 2.65 6.08

956 1995 Sep 12 14 1 . 1.1 . 8.5 16.8 3.3 0.9 0.02 3.2 1.18 0.69 13.4 2.19 2.99 4.89

956 1995 Sep 12 16 1 19.0 1.8 . 4.1 17.5 3.3 0.7 0.02 3.9 2.42 0.69 11.5 1.35 2.61 4.61

956 1995 Sep 12 19 1 18.5 1.3 . 7.6 17.0 2.4 0.7 0.08 9.1 1.47 1.27 9.2 1.70 2.43 6.18

956 1995 Sep 12 20 1 18.5 2.7 . 3.2 11.2 3.4 0.6 0.16 10.6 1.55 0.65 8.2 0.87 2.23 3.57

956 1995 Sep 12 20 8 . . . 3.3 11.4 3.6 0.6 0.17 10.2 1.53 0.61 8.2 0.78 2.17 3.64

956 1995 Sep 12 21 1 18.0 3.3 . 2.3 7.7 2.7 0.4 0.11 3.9 1.62 0.24 8.0 0.82 2.45 2.79

956 1995 Sep 12 23 1 18.5 8.0 . 0.7 5.1 2.4 0.4 0.27 7.6 0.89 0.30 6.2 0.33 2.00 1.15

956 1995 Sep 12 23 14 . . . 0.6 4.1 2.4 0.5 0.27 7.6 0.89 0.30 6.2 0.36 1.97 1.35

956 1995 Sep 12 24 1 19.5 2.0 . 4.6 9.4 2.7 0.3 0.20 13.6 1.29 0.71 7.2 1.17 2.09 3.89

956 1995 Sep 12 24 6 . . . 4.5 11.1 2.7 0.3 0.20 15.8 1.29 0.78 7.2 1.16 2.08 3.89

957 1995 Oct 25 4 1 11.0 1.0 . 16.8 29.9 2.8 0.5 0.08 8.0 0.64 2.57 13.3 1.78 2.87 13.23

957 1995 Oct 25 5 1 10.0 0.8 . 17.4 31.4 3.6 1.1 0.04 16.8 0.27 3.11 15.0 1.96 3.16 13.92

957 1995 Oct 25 7 1 10.0 0.5 . 17.5 28.5 2.2 0.7 0.16 8.4 1.56 2.52 11.6 1.52 2.53 8.07

957 1995 Oct 25 10 1 9.6 3.0 . 2.5 5.6 1.9 0.3 0.29 9.2 1.70 0.44 7.6 0.49 1.89 1.87

957 1995 Oct 25 10 6 . . . 2.6 5.6 1.6 0.4 0.30 14.5 1.82 0.41 7.4 0.46 1.96 1.90

957 1995 Oct 30 11 1 9.0 1.5 . 5.4 11.5 2.2 0.5 0.14 14.9 0.93 0.89 12.5 0.77 2.80 4.20

957 1995 Oct 30 11 5 . . . 5.1 11.5 2.5 0.5 0.14 12.2 0.96 0.85 12.3 0.71 2.55 3.95

957 1995 Oct 25 13 1 10.0 1.0 . 16.3 22.4 1.6 0.3 0.21 17.2 1.65 1.78 8.6 1.37 2.12 3.78

957 1995 Oct 25 14 1 11.0 1.0 . 15.5 22.2 1.9 0.3 0.24 13.4 1.56 1.48 8.1 1.41 2.03 3.40

957 1995 Oct 25 16 1 10.0 1.3 . 11.4 18.0 2.2 0.4 0.21 13.4 1.67 1.24 8.9 1.07 2.10 2.96

957 1995 Oct 30 19 1 9.0 4.5 . 2.4 7.6 1.9 0.3 0.23 11.1 1.56 0.37 8.3 0.52 2.23 1.91

957 1995 Oct 30 20 1 9.0 4.5 . 1.5 5.4 2.4 0.3 0.30 9.6 1.65 0.28 7.2 0.37 1.94 2.15

957 1995 Oct 30 20 8 . . . 1.5 5.4 1.9 0.3 0.31 8.8 1.66 0.27 7.2 0.34 1.82 2.33

957 1995 Oct 30 21 1 9.0 6.0 . 0.6 3.4 1.9 0.2 0.27 18.0 1.65 0.12 7.8 0.21 1.92 0.31

957 1995 Oct 30 23 1 9.0 6.0 . 1.0 3.7 1.9 0.2 0.30 6.1 1.59 0.22 6.9 0.28 1.81 2.33

957 1995 Oct 30 23 14 . . . 1.0 3.7 1.9 0.2 0.31 6.5 1.65 0.22 7.0 0.33 1.68 2.28

957 1995 Oct 30 24 1 9.0 1.5 . 7.1 12.7 2.2 0.2 0.20 9.2 1.50 1.14 8.9 0.90 2.10 3.47

957 1995 Oct 30 24 6 . . . 7.5 13.4 2.2 0.2 0.20 9.2 1.50 1.17 8.9 0.93 2.09 3.49
38

Sampling Dates Station Depth Temp Secchi KPAR TSS TP TDP SRP NIT AMM SILICA PSI CL POC DOC CHL

Cruise Year Month Day ID (m) (oC) (m) ( /m) (mg/L) (ug/L) (ug/L) (ug/L) (mg/L) (ug/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (ug/L)

961 1996 May 7 4 1 8.0 1.0 . 9.8 21.1 . . . . . . . 0.82 . 2.89

961 1996 May 7 5 1 . 2.8 0.69 2.4 10.2 5.5 0.3 0.54 15.5 1.21 0.33 17.9 0.32 . 0.76

961 1996 May 7 7 1 8.0 1.3 . 6.9 15.5 . . . . . . . 0.59 . 2.92

961 1996 May 7 10 1 7.0 1.9 0.57 4.2 15.0 4.9 0.3 0.47 4.3 1.51 0.78 15.1 0.65 . 5.93

961 1996 May 7 10 6 . . . 4.3 14.0 4.3 0.3 0.47 5.5 1.51 0.80 15.3 0.63 . 5.54

961 1996 May 4 11 1 5.0 1.9 . 5.1 10.4 . . . . . . . 0.35 . 2.27

961 1996 May 4 11 5 . . . 4.4 10.4 . . . . . . . 0.46 . 2.24

961 1996 May 7 13 1 7.0 5.4 . 0.8 4.9 . . . . . . . 0.17 . 0.25

961 1996 May 7 14 1 8.5 1.5 0.73 5.4 17.0 5.8 0.4 1.40 11.8 0.69 0.93 25.3 0.64 . 5.71

961 1996 May 7 16 1 8.0 2.5 . 4.3 8.4 . . . . . . . 0.34 . 0.76

961 1996 May 4 19 1 5.0 5.4 0.24 0.4 4.3 3.7 0.2 0.31 11.8 1.46 0.10 6.0 0.14 . 0.29

961 1996 May 4 20 1 3.0 5.4 . 0.9 4.7 . . . . . . . 0.24 . 2.06

961 1996 May 4 20 8 . . . 0.9 4.6 . . . . . . . 0.25 . 2.08

961 1996 May 4 21 1 5.0 5.4 . 0.3 3.4 . . . . . . . 0.15 . 0.25

961 1996 May . 23 1 . . . . . . . . . . . . . . .

961 1996 May . 23 14 . . . . . . . . . . . . . . .

961 1996 May . 24 1 . . . . . . . . . . . . . . .

961 1996 May . 24 6 . . . . . . . . . . . . . . .

962 1996 May 30 4 1 17.0 0.4 . 44.7 92.2 . . . . . . . 2.21 . 8.71

962 1996 May 30 5 1 14.0 3.2 0.30 1.7 6.1 3.8 0.4 0.39 12.7 0.52 0.40 14.5 0.23 . 0.80

962 1996 May 30 7 1 14.0 1.0 . 12.0 19.6 . . . . . . . 1.13 . 6.16

962 1996 May 30 10 1 16.0 0.6 2.28 22.6 53.4 5.8 1.4 1.62 43.6 1.84 2.71 24.3 1.70 . 12.90

962 1996 May 30 10 6 15.0 . . 18.6 45.3 5.2 1.1 1.17 27.4 1.13 2.45 23.7 1.52 . 12.29

962 1996 May 28 11 1 13.0 2.8 . 3.3 9.4 . . . . . . . 0.67 . 6.49

962 1996 May 28 11 5 . . . 3.7 12.7 . . . . . . . 0.81 . 6.26

962 1996 May 30 13 1 13.0 3.6 . 1.1 4.3 . . . . . . . 0.14 . 0.22

962 1996 May 30 14 1 14.5 2.8 0.69 3.5 6.3 2.8 0.3 0.44 9.9 1.04 0.69 10.9 0.31 . 1.58

962 1996 May 30 16 1 12.5 3.9 . 2.2 5.3 . . . . . . . 0.19 . 0.55

962 1996 May 28 19 1 13.0 5.8 0.33 0.4 4.3 2.8 0.6 0.41 31.1 0.99 0.11 10.3 0.10 . 0.12

962 1996 May 28 20 1 12.0 3.6 . 1.7 6.3 . . . . . . . 0.39 . 2.51

962 1996 May 28 20 8 . . . 1.4 5.8 . . . . . . . 0.34 . 2.14

962 1996 May 28 21 1 12.5 5.8 . 0.5 3.7 . . . . . . . 0.14 . 0.44

962 1996 May 28 23 1 6.5 5.8 . 0.8 4.0 2.5 0.4 0.32 5.5 1.40 0.23 5.5 0.24 . 1.82

962 1996 May 28 23 14 6.0 . . 1.0 3.7 2.5 0.6 0.31 5.5 1.43 0.26 5.4 0.26 . 2.16

962 1996 May 28 24 1 11.0 4.1 . 0.8 4.9 . . . . . . . 0.19 . 1.14

962 1996 May 28 24 6 10.5 . . 0.7 3.7 . . . . . . . 0.20 . 1.11

963 1996 Jun 12 4 1 17.0 1.5 . 3.8 15.7 . . . . . . . 0.42 . 2.69

963 1996 Jun 12 5 1 17.0 3.2 0.51 1.2 9.6 2.7 0.5 0.52 26.5 0.29 0.27 17.4 0.28 . 0.85

963 1996 Jun 12 7 1 17.0 1.5 . 4.6 14.8 . . . . . . . 0.66 . 5.81

963 1996 Jun 12 10 1 16.0 1.0 1.21 8.4 30.2 4.8 0.6 1.06 11.9 0.72 0.69 21.9 0.87 . 6.54

963 1996 Jun 12 10 6 16.0 . . 8.7 27.6 4.2 0.5 1.05 11.9 0.72 1.18 21.7 0.89 . 6.13

963 1996 Jun 11 11 1 16.0 1.5 . 5.4 22.3 . . . . . . . 0.74 . 4.79

963 1996 Jun 11 11 5 . . . 5.8 18.6 . . . . . . . 0.68 . 5.02

963 1996 Jun 11 13 1 15.0 4.1 . 0.9 3.8 . . . . . . . 0.17 . 0.67

963 1996 Jun 12 14 1 17.0 4.1 0.27 0.5 5.8 2.6 0.4 0.75 31.7 0.13 0.13 15.7 0.12 . 0.35

963 1996 Jun 12 16 1 16.0 3.2 . 0.9 8.1 . . . . . . . 0.17 . 0.88

963 1996 Jun 11 19 1 15.0 4.1 0.20 1.0 5.0 2.8 0.3 0.41 19.3 0.66 0.36 10.9 0.16 . 1.03

963 1996 Jun 11 20 1 14.0 4.5 . 1.1 6.0 . . . . . . . 0.22 . 1.43

963 1996 Jun 11 20 8 14.0 . . 1.2 6.2 . . . . . . . 0.25 . 1.49

963 1996 Jun 11 21 1 13.5 7.1 . 0.6 4.2 . . . . . . . 0.13 . 0.79

963 1996 Jun 11 23 1 9.0 7.1 0.14 0.6 4.0 2.0 0.2 0.33 3.2 1.31 0.17 5.4 0.13 . 1.92

963 1996 Jun 11 23 14 8.0 . . 0.9 4.0 2.4 0.2 0.34 3.2 1.40 0.29 5.1 0.19 . 1.94

963 1996 Jun 11 24 1 15.0 4.9 . 1.2 4.4 . . . . . . . 0.25 . 1.46

963 1996 Jun 11 24 6 . . . 1.3 4.0 . . . . . . . 0.26 . 1.54

964 1996 Jun 27 4 1 23.5 2.6 . 2.4 18.6 . . . . . . . 0.75 . 4.25

964 1996 Jun 27 5 1 23.0 2.8 0.44 0.7 9.3 4.5 0.5 0.59 23.2 0.44 0.10 17.4 0.25 . 0.45

964 1996 Jun 27 7 1 23.0 2.1 . 3.1 19.1 . . . . . . . 0.75 . 2.54

964 1996 Jun 27 10 1 21.0 1.9 0.73 3.8 16.9 4.2 0.6 1.04 11.5 0.75 0.50 21.1 0.60 . 2.97

964 1996 Jun 27 10 6 20.0 . . 2.8 14.6 4.2 0.5 1.04 15.0 0.78 0.45 20.6 0.57 . 3.02

964 1996 Jun 27 11 1 19.5 2.3 . 2.4 13.9 . . . . . . . 0.57 . 1.67

964 1996 Jun 27 11 5 . . . 2.2 15.2 . . . . . . . 0.54 . 2.60

964 1996 Jun 27 13 1 20.0 4.1 . 0.7 9.0 . . . . . . . 0.29 . 0.73

964 1996 Jun 27 14 1 22.0 4.1 0.49 1.2 13.1 8.0 0.6 2.72 6.3 0.43 0.13 20.5 0.40 . 2.24

964 1996 Jun 27 16 1 21.5 4.1 . 1.0 7.7 . . . . . . . 0.24 . 0.87

964 1996 Jun 27 19 1 18.5 2.8 0.60 1.6 11.6 5.4 0.5 0.89 12.5 0.72 0.36 18.8 0.41 . 1.95

964 1996 Jun 27 20 1 18.0 3.4 . 1.2 8.3 . . . . . . . 0.28 . 1.33

964 1996 Jun 27 20 8 . . . 1.1 6.8 . . . . . . . 0.28 . 1.33

964 1996 Jun 27 21 1 18.0 7.1 . 1.6 6.6 . . . . . . . 0.28 . 0.62

964 1996 Jun 27 23 1 14.0 7.1 0.22 0.4 3.2 2.2 0.5 0.27 5.8 1.25 0.11 5.4 0.19 . 0.64

964 1996 Jun 27 23 14 9.0 . . 1.1 3.8 2.8 0.4 0.27 4.8 1.19 0.40 5.1 0.41 . 2.43

964 1996 Jun 27 24 1 18.0 5.8 . 0.4 4.7 . . . . . . . 0.22 . 0.76

964 1996 Jun 27 24 6 17.0 . . 0.8 6.9 . . . . . . . 0.20 . 0.99

965 1996 Jul 17 4 1 22.5 1.9 . 3.7 26.5 . . . . . . . 0.83 . 5.68

965 1996 Jul 17 5 1 22.5 3.6 0.45 1.0 13.4 7.8 1.0 0.79 26.4 0.59 0.10 20.7 0.44 . 1.85

965 1996 Jul 17 7 1 22.0 2.8 . 2.4 15.7 . . . . . . . 0.56 . 2.62

965 1996 Jul 17 10 1 22.0 3.6 0.46 2.2 15.6 6.8 0.8 0.61 18.6 1.05 0.32 17.9 0.59 . 3.13

965 1996 Jul 17 10 6 21.0 . . 2.3 12.6 4.8 0.8 0.38 10.6 1.08 0.36 12.5 0.57 . 2.44

965 1996 Jul 15 11 1 21.0 4.5 . 1.0 10.3 . . . . . . . 0.36 . 1.13
39

Sampling Dates Station Depth Temp Secchi KPAR TSS TP TDP SRP NIT AMM SILICA PSI CL POC DOC CHL

Cruise Year Month Day ID (m) (oC) (m) ( /m) (mg/L) (ug/L) (ug/L) (ug/L) (mg/L) (ug/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (ug/L)

965 1996 Jul 15 11 5 18.5 . . 0.8 9.2 . . . . . . . 0.30 . 1.20

965 1996 Jul 17 13 1 23.0 2.3 . 3.0 23.6 . . . . . . . 0.97 . 6.47

965 1996 Jul 17 14 1 23.0 2.8 0.91 1.9 21.0 8.4 1.3 2.37 40.2 1.98 0.32 21.7 0.50 . 3.38

965 1996 Jul 17 16 1 23.0 1.9 . 4.8 36.6 . . . . . . . 1.01 . 10.22

965 1996 Jul 15 19 1 19.5 4.9 0.32 1.1 9.2 3.8 0.7 0.51 10.1 1.03 0.25 12.6 0.35 . 2.26

965 1996 Jul 15 20 1 17.0 7.9 . 0.6 6.1 . . . . . . . 0.27 . 0.88

965 1996 Jul 15 20 8 16.5 . . 0.7 5.5 . . . . . . . 0.32 . 0.99

965 1996 Jul 15 21 1 19.0 7.9 . 0.3 4.3 . . . . . . . 0.17 . 0.53

965 1996 Jul 15 23 1 18.0 6.2 0.26 0.5 3.9 3.8 0.4 0.26 7.0 1.15 0.12 6.6 0.24 . 0.87

965 1996 Jul 15 23 14 15.0 . . 0.8 4.1 2.6 0.4 0.26 5.0 1.18 0.22 6.6 0.30 . 1.45

965 1996 Jul 15 24 1 20.5 4.9 . 1.4 6.6 . . . . . . . 0.43 . 2.26

965 1996 Jul 15 24 6 20.5 . . 1.3 8.6 . . . . . . . 0.43 . 2.54

966 1996 Aug 21 4 1 24.5 1.5 . 8.5 24.8 . . . . . . . 2.16 . 17.13

966 1996 Aug 21 5 1 25.0 1.5 1.03 10.5 23.8 4.6 0.9 0.17 10.7 2.91 0.57 20.2 2.78 . 16.79

966 1996 Aug 21 7 1 24.0 2.8 . 3.7 13.2 . . . . . . . 1.04 . 5.53

966 1996 Aug 21 10 1 23.5 2.8 0.82 4.0 13.4 4.1 1.0 0.27 10.2 2.11 0.54 13.7 1.21 . 6.63

966 1996 Aug 21 10 6 23.5 . . 6.8 17.9 3.7 1.0 0.26 7.6 2.37 0.63 14.5 1.85 . 11.40

966 1996 Aug 21 11 1 21.0 2.3 . 4.4 11.7 . . . . . . . . . 8.76

966 1996 Aug 21 11 5 . . . 4.6 11.7 . . . . . . . . . 9.23

966 1996 Aug 21 13 1 24.0 1.9 . 6.8 11.1 . . . . . . . 1.95 . 10.41

966 1996 Aug 21 14 1 24.0 1.7 0.99 9.4 21.1 3.1 0.8 0.19 6.8 1.21 0.76 16.5 2.61 . 15.57

966 1996 Aug 21 16 1 24.0 1.9 . 5.8 12.9 . . . . . . . 1.69 . 9.04

966 1996 Aug 21 19 1 23.0 1.9 0.74 6.6 11.9 2.5 0.8 0.24 7.6 0.61 0.91 13.6 1.73 . 9.73

966 1996 Aug 21 20 1 22.0 3.6 . 2.3 5.7 . . . . . . . 0.71 . 3.24

966 1996 Aug 21 20 8 22.0 . . 2.3 5.9 . . . . . . . 0.73 . 3.25

966 1996 Aug 21 21 1 21.0 4.1 . 1.8 5.0 . . . . . . . 0.87 . 1.96

966 1996 Aug 21 23 1 21.5 6.2 0.20 0.9 3.3 1.4 0.5 0.33 8.6 0.64 0.27 8.6 0.56 . 1.04

966 1996 Aug 21 23 14 12.6 . . 0.8 2.5 1.9 0.5 0.33 7.4 0.64 0.26 8.5 0.55 . 1.01

966 1996 Aug 21 24 1 22.0 5.4 . 1.2 3.3 . . . . . . . 0.74 . 1.48

966 1996 Aug 21 24 6 21.5 . . 1.4 4.4 . . . . . . . 0.87 . 1.58

967 1996 Sep 20 4 1 19.0 0.7 . 16.6 42.4 . . . . . . . 2.58 . 20.97

967 1996 Sep 20 5 1 18.2 1.3 0.97 7.0 15.8 3.0 1.3 0.08 4.9 1.71 0.62 14.1 1.77 . 7.68

967 1996 Sep 20 7 1 19.2 1.0 . 8.7 25.5 . . . . . . . 1.84 . 12.57

967 1996 Sep 20 10 1 19.0 1.2 1.33 8.1 25.3 3.1 1.5 0.13 5.3 2.44 0.76 12.6 1.47 . 11.71

967 1996 Sep 20 10 6 . . . 10.8 32.5 2.7 1.5 0.13 9.6 2.42 1.24 12.7 1.72 . 16.42

967 1996 Sep 20 11 1 17.0 1.0 . 11.2 31.1 . . . . . . . 1.97 . 16.50

967 1996 Sep 20 11 5 . . . 11.6 30.5 . . . . . . . 1.98 . 16.07

967 1996 Sep 20 13 1 18.0 4.1 . 0.9 3.8 . . . . . . . 0.21 . 0.77

967 1996 Sep 20 14 1 18.5 0.6 1.32 15.4 29.6 2.3 1.5 0.09 6.8 0.82 0.86 18.0 3.12 . 13.13

967 1996 Sep 20 16 1 19.0 2.8 . 2.6 8.6 . . . . . . . 0.79 . 3.64

967 1996 Sep 20 19 1 18.0 4.1 0.20 0.6 3.5 1.4 0.8 0.28 23.1 0.86 0.10 7.3 0.16 . 0.25

967 1996 Sep 20 20 1 18.0 2.1 . 8.9 22.3 . . . . . . . 1.89 . 12.36

967 1996 Sep 20 20 8 18.0 . . 9.8 23.5 . . . . . . . 1.82 . 11.94

967 1996 Sep 20 21 1 18.0 4.1 . 1.4 4.6 . . . . . . . 0.43 . 1.98

967 1996 Sep 20 23 1 18.0 6.6 0.19 0.8 2.7 1.2 0.7 0.25 9.6 1.10 0.23 6.3 0.16 . 1.38

967 1996 Sep 20 23 14 . . . 0.8 2.9 1.4 0.6 0.25 8.8 1.13 0.24 6.5 0.17 . 1.40

967 1996 Sep 20 24 1 18.0 2.6 . 2.8 6.1 . . . . . . . 0.55 . 3.08

967 1996 Sep 20 24 6 . . . 3.6 7.5 . . . . . . . 0.69 . 3.91