Cruise: Surv-1998-068  (Mar 16 - Mar 19, 1998)
Ship: R/V Laurentian

Data type: Particulate and dissolved nutrients, suspended solids
           on discrete water samples
 1) Total suspended material  (TSM): gravimetric, GF-F filters
 2) Total Phosphorus (TP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after persulfate digestion
 3) Total Dissolved Phosphorus (TDP) : molybdate/ascorbic acid method on AutoAnalyzer II,
    after persulfate digestion of 0.2 uM filtered samples
 4) Particulate Phosphorus (PP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after combustion, boiling HCL extraction of particles retained on a GFF filter
 5) Bioavailable Phosphorus (AVP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after NaOH digestion of particles retained on 0.2 uM nucleopore filter
 6) Particulate Silica  (PSiO2) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after NaOH digestion of particles retained on 0.2 uM nucleopore filter
 7) Soluble Reactive Phosphorus (SRP) : molybdate/ascorbic acid method on AutoAnalyzer II,
    of  0.2 uM filtered samples
 8) Nitrate + Nitrite (NO3): cadium reduction method on AutoAnalyzer II, of 0.2 uM 
    filtered samples
 9) Ammonium (NH4): phenol method on AutoAnalyzer II, of 0.2 uM filtered samples
10) Soluble Reactive Silica (SiO2): molybdate/ascorbic acid method on AutoAnalyzer II of 
    0.2 uM filtered samples
11) Chloride (Cl):  ferric thicyanate method on AutoAnalyzer II of 0.2 uM filtered samples
12) Particulate Organic Carbon (POC): Perkin Elmer CHN elemental analyzer
13) Particulate Organic Nitrogen (PON): Perkin Elmer CHN elemental analyzer
NOTES:  TSM data taken from Eadie/Winkelman (NOT original data)
NOTES:  missing data denoted by -999
NOTES:  chlorophyll ananlyses for this cruise were done by Fahnenstiel

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Cruise: PROC-1998-081
Ship: R/V Laurentian
Cruise Dates:  March 22 - April 3, 1998

Data type: 
Particulate and dissolved nutrients on discrete water samples
Total Dissolved Phosphorus (TDP) : molybdate/ascorbic acid method on 
   AutoAnalyzer II, after persulfate digestion of 0.2 uM filtered samples
Particulate Phosphorus (PP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   after combustion, boiling HCL extraction of particles retained on a GFF filter
Bioavailable Phosphorus (AVP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   after NaOH digestion of particles retained on 0.2 uM nucleopore filter
Particulate Silica  (PSiO2) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   after NaOH digestion of particles retained on 0.2 uM nucleopore filter
Soluble Reactive Phosphorus (SRP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   of  0.2 uM filtered samples
Nitrate + Nitrite (NO3): cadium reduction method on AutoAnalyzer II, of 0.2 uM 
   filtered samples
Ammonium (NH4): phenol method on AutoAnalyzer II, of 0.2 uM filtered samples
Particulate Organic Carbon (POC): Perkin Elmer CHN elemental analyzer
Particulate Organic Nitrogen (PON): Perkin Elmer CHN elemental analyzer
TDP coeff of variance on field reps = 7.6%  (n=9)
PP coeff of variance on field reps = 6.0%    (n=7)
AVP coeff of variance on field reps = 2.5%    (n=4)
NO3 coeff of variance on duplicates = 0.7% (n=4)
NH4 coeff of variance on duplicates = 17.2% (n=4)
SRP coeff of variance on duplicates = 32.1% (n=4)
POC coeff of variance on duplicates = 13.7%   (n=9 pairs)
PON coeff of variance on duplicates = 17.7%   (n=9 pairs)

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Cruise: LAGR-1998-094
Ship: R/V Laurentian
Cruise Dates: April 4 - 11, 1998

Data type: 
Particulate and dissolved nutrients,  and suspended solids, on discrete water samples
Total suspended material  (TSM): gravimetric, GF-F filters
Total Phosphorus (TP) : molybdate/ascorbic acid method on AutoAnalyzer II, after 
   persulfate digestion
Total Dissolved Phosphorus (TDP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   after persulfate digestion of 0.2 uM filtered samples
Particulate Phosphorus (PP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   after combustion, boiling HCL extraction of particles retained on a GFF filter
Bioavailable Phosphorus (AVP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   after NaOH digestion of particles retained on 0.2 uM nucleopore filter
Particulate Silica  (PSiO2) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   after NaOH digestion of particles retained on 0.2 uM nucleopore filter
Soluble Reactive Phosphorus (SRP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   of  0.2 uM filtered samples
Nitrate + Nitrite (NO3): cadium reduction method on AutoAnalyzer II, of 0.2 uM 
   filtered samples
Ammonium (NH4): phenol method on AutoAnalyzer II, of 0.2 uM filtered samples
Soluble Reactive Silica (SiO2): molybdate/ascorbic acid method on AutoAnalyzer II 
   of 0.2 uM filtered samples
Particulate Organic Carbon (POC): Perkin Elmer CHN elemental analyzer
Particulate Organic Nitrogen (PON): Perkin Elmer CHN elemental analyzer
TP coeff of variance on field reps = 1.5%  (n=3)
TDP coeff of variance on field reps = 10.0%  (n=3)
PP coeff of variance on field reps = 9.3%    (n=3)
AVP coeff of variance on field reps = 0%    (n=2)
PSiO2 coeff of variance on field reps = 1.0%    (n=2)
POC coeff of variance on duplicates = 13.4%   (n=8 pairs)
PON coeff of variance on duplicates = 12.8%   (n=8 pairs)

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Cruise: Surv-1998-139  (May 20 - May 23, 1998)
Ship: R/V Lake Guardian

Data type: Particulate and dissolved nutrients, chlorophyll, suspended solids
           on discrete water samples
 1) Total suspended material  (TSM): gravimetric, GF-F filters
 2) Total Phosphorus (TP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after persulfate digestion
 3) Total Dissolved Phosphorus (TDP) : molybdate/ascorbic acid method on AutoAnalyzer II,
    after persulfate digestion of 0.2 uM filtered samples
 4) Particulate Phosphorus (PP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after combustion, boiling HCL extraction of particles retained on a GFF filter
 5) Bioavailable Phosphorus (AVP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after NaOH digestion of particles retained on 0.2 uM nucleopore filter
 6) Particulate Silica  (PSiO2) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after NaOH digestion of particles retained on 0.2 uM nucleopore filter
 7) Soluble Reactive Phosphorus (SRP) : molybdate/ascorbic acid method on AutoAnalyzer II,
    of  0.2 uM filtered samples
 8) Nitrate + Nitrite (NO3): cadium reduction method on AutoAnalyzer II, of 0.2 uM 
    filtered samples
 9) Ammonium (NH4): phenol method on AutoAnalyzer II, of 0.2 uM filtered samples
10) Soluble Reactive Silica (SiO2): molybdate/ascorbic acid method on AutoAnalyzer II of 
    0.2 uM filtered samples
11) Chloride (Cl):  ferric thicyanate method on AutoAnalyzer II of 0.2 uM filtered samples
12) Particulate Organic Carbon (POC): Perkin Elmer CHN elemental analyzer
13) Particulate Organic Nitrogen (PON): Perkin Elmer CHN elemental analyzer
14) Chlorophyll (CHL) :  Fluorometric method, acid corrected, after extraction of particles
    retained on a GFF filter with Dimethyl Foramimide.
TDP coeff of variance on field reps = 11.6%  (n=11)
PP coeff of variance on field reps = 11.1%    (n=11)
CHL coeff of variance on duplicates = 2.4%   (n=33 pairs)
POC coeff of variance on duplicates = 7.7%   (n=33 pairs)
PON coeff of variance on duplicates = 13.9%   (n=33 pairs)

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Cruise: Surv-1998-241
Ship: R/V Laurentian

Data type: Particulate and dissolved nutrients on discrete water samples

Total Dissolved Phosphorus (TDP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   after persulfate digestion of 0.2 uM filtered samples
Particulate Phosphorus (PP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   after combustion, boiling HCL extraction of particles retained on a GFF filter
Soluble Reactive Phosphorus (SRP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
   of  0.2 uM filtered samples
Nitrate + Nitrite (NO3): cadium reduction method on AutoAnalyzer II, of 0.2 uM filtered 
   samples
Ammonium (NH4): phenol method on AutoAnalyzer II, of 0.2 uM filtered samples

Summary of Analytical Precision

PP avg. coeff of variance on analytical reps = 9.3%    (n=44 pairs)
TDP avg. coeff of variance on field reps = 16.5%  (n=36 pairs)
SRP avg. coeff of variance on field reps = 44%  (n=36 pairs)
NO3 avg. coeff of variance on field reps = 1.3%  (n=20 pairs)
NH4 avg. coeff of variance on field reps = 19.6%  (n=20 pairs)


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1999 Nutrients Data

Data type: Particulate and dissolved nutrients, suspended solids
           on discrete water samples
 1) Total suspended material  (TSM): gravimetric, GF-F filters
 2) Total Phosphorus (TP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after persulfate digestion
 3) Total Dissolved Phosphorus (TDP) : molybdate/ascorbic acid method on AutoAnalyzer II,
    after persulfate digestion of 0.2 uM filtered samples
 4) Particulate Phosphorus (PP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after combustion, boiling HCL extraction of particles retained on a GFF filter
 5) Bioavailable Phosphorus (AVP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after NaOH digestion of particles retained on 0.2 uM nucleopore filter
 6) Particulate Silica  (PSiO2) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after NaOH digestion of particles retained on 0.2 uM nucleopore filter
 7) Soluble Reactive Phosphorus (SRP) : molybdate/ascorbic acid method on AutoAnalyzer II,
    of  0.2 uM filtered samples
 8) Nitrate + Nitrite (NO3): cadium reduction method on AutoAnalyzer II, of 0.2 uM 
    filtered samples
 9) Ammonium (NH4): phenol method on AutoAnalyzer II, of 0.2 uM filtered samples
10) Soluble Reactive Silica (SiO2): molybdate/ascorbic acid method on AutoAnalyzer II of 
    0.2 uM filtered samples
11) Chloride (Cl):  ferric thicyanate method on AutoAnalyzer II of 0.2 uM filtered samples
12) Particulate Organic Carbon (POC): Carlo Erba CHN elemental analyzer
13) Particulate Organic Nitrogen (PON): Carlo Erba CHN elemental analyzer

OP #        (text)
Year        (yr)
DOY         (day)
Latitude    (deg)
Latitude    (min)
Longitude   (deg)
Longitude   (min)
Station     (text)
Depth       (m)
Sample ID   (text)
Secchi      (m)
TSM         (mg/l)
TP          (ugP/l)
TDP         (ugP/l)
PP          (ugP/l)
PSiO2       (mg/L)
NO3         (ugN/l)
NH4         (ugN/l)
SRP         (ugP/l)
SiO2        (mg/l)
Cl          (mg/l)
POC         (mg/l)
PON         (mg/l)
CHL	    (ug/l)

------------------------------------------------------------------------------------------

2000 Nutrients Data

Data type: Particulate and dissolved nutrients, suspended solids
           on discrete water samples
 1) Total suspended material  (TSM): gravimetric, GF-F filters
 2) Total Phosphorus (TP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after persulfate digestion
 3) Total Dissolved Phosphorus (TDP) : molybdate/ascorbic acid method on AutoAnalyzer II,
    after persulfate digestion of 0.2 uM filtered samples
 4) Particulate Phosphorus (PP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after combustion, boiling HCL extraction of particles retained on a GFF filter
 5) Bioavailable Phosphorus (AVP) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after NaOH digestion of particles retained on 0.2 uM nucleopore filter
 6) Particulate Silica  (PSiO2) : molybdate/ascorbic acid method on AutoAnalyzer II, 
    after NaOH digestion of particles retained on 0.2 uM nucleopore filter
 7) Soluble Reactive Phosphorus (SRP) : molybdate/ascorbic acid method on AutoAnalyzer II,
    of  0.2 uM filtered samples
 8) Nitrate + Nitrite (NO3): cadium reduction method on AutoAnalyzer II, of 0.2 uM 
    filtered samples
 9) Ammonium (NH4): phenol method on AutoAnalyzer II, of 0.2 uM filtered samples
10) Soluble Reactive Silica (SiO2): molybdate/ascorbic acid method on AutoAnalyzer II of 
    0.2 uM filtered samples
11) Chloride (Cl):  ferric thicyanate method on AutoAnalyzer II of 0.2 uM filtered samples
12) Particulate Organic Carbon (POC): Carlo Erba CHN elemental analyzer
13) Particulate Organic Nitrogen (PON): Carlo Erba CHN elemental analyzer

OP #        (text)
Year        (yr)
DOY         (day)
Time        (GMT)
Latitude    (deg)
Latitude    (min)
Longitude   (deg)
Longitude   (min)
Station     (text)
Depth       (m)
Sample ID   (text)
Secchi      (m)
TSM         (mg/l)
TP          (ugP/l)
TDP         (ugP/l)
PP          (ugP/l)
PSiO2       (mg/L)
NO3         (ugN/l)
NH4         (ugN/l)
SRP         (ugP/l)
SiO2        (mg/l)
Cl          (mg/l)
POC         (mg/l)
PON         (mg/l)
CHL	    (ug/l)
