Water chemistry data for various lakes near Toolik Research Station, Arctic LTER. Summer 1983 to 1989.

Abstract: 

Decadal file describing the water chemistry in various lakes near Toolik Research Station (68 38'N, 149 36'W) during summers from 1983 to 1989. Chemical analyses were conducted on samples from various depths in the sample lakes either once, or multiple times during the spring, summer and fall months (May to September). Chemical analyses for the samples include alkalinity, dissolved organic and inorganic carbon (DIC/DOC), inorganic and total dissolved nutrients (NH4, PO4, NO3, TDN, TDP), particulate carbon, nitrogen and phosphorous (PC, PN, PP), cations (Ca, Mg, K, Na and Si) and anions (SO4, Cl).

See methods for the yearly datasets which were combined into this data set.

Project Keywords: 

Data set ID: 

10333

EML revision ID: 

5

Short name: 

ARC_Lakes_Chemistry_1983-1989

DOI: 

10.6073/pasta/7d30ceaaf64ac5e6bf6a336c17e3ffb1
People

Keywords: 

Arctic LTER keywords: 

Dates

Date Range: 

Tuesday, August 9, 1983 to Saturday, August 26, 1989

Publication Date: 

Thursday, December 12, 1985

Methods: 

For water sampling protocols see the Arctic LTER Land-Water group protocol book accessible from the Land-Water mainpage on the Arctic LTER web page or at http://www-personal.umich.edu/~gwk and clicking on the protocol link at the bottom of the page. Specific methodologies are described in the protocol book listed above and a general description is provided below.
General analyses: In general water samples from soils, streams, and lakes are filtered in the field and kept cold and dark or preserved until analysis. Dissolved inorganic nutrients (NH4 and PO4) were analyzed by wet chemistry techniques at Toolik Field Station usually within 24 hours of sampling. Prior to 1999, the phenate method was used to analyze the ammonium content. In the years 1999-2001, a comparison study of the OPA method and the phenate method were performed. Starting in 2001, OPA was used to analyze ammonium content. Gas samples were analyzed at Toolik Field Station. DIC samples were acidified in the field and analyzed on a gas chromatograph at Toolik Field Station. DOC, TDN, TDP, particulate C, N, and P, and dissolved ions were brought back to the University of Michigan for analysis. DOC is analyzed on a Shimadzu TOC-5000. Particulate Carbon and Nitrogen on a Perkin Elmer CHN 2400, TDN is analyzed on a Shimadzu TOC-5000 or using a persulfate digestion. TDP and NO3 are analyzed on an OI Alpkem autoanalyzer, ions on a Dionex ion chromatograph, and cations on an inductively coupled plasma optical emission spectrometer (ICP-OESPerkin Elmer Optima 4300 or 8000). Alkalinity samples were run on a Radiometer autotitrator either at Toolik Field Station or at the University of Michigan.
For all analyses, sample values that were less than zero were assigned a value of zero. See specific protocols for limits of detection. Missing values (not sampled or analyzed) are represented by a period " . " in the dataset.

Notes: This file combines the data from the following data sets.

Dataset ID
File Name
Title
324 1985-89_N2ct_NutProfile Vertical profiles of nitrate, phosphate and ammonia for lake N2 reference from 1985-1989 , Arctic LTER 1985 to 1989.
325 1985-89_N2Fert_NutProfile Vertical profiles of nitrate, phosphate and ammonia for lake N2 (fertilized side) from 1985-1989 , Arctic LTER 1985 to 1989.
10261 1989_ArcticLTER_Lakes_nuts Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 1989.
10158 1990_ArcticLTER_Lakes_nuts Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 1990.
10159 1991_ArcticLTER_Lakes_nuts Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 1991.
10160 1992_ArcticLTER_Lakes_nuts Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 1992.
10161 1993_ArcticLTER_Lakes_nuts Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 1993.
10162 1994_ArcticLTER_Lakes_nuts Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 1994.
10165 1995_ArcticLTER_Lakes_nuts Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 1995.
10178 1996_ArcticLTER_Lakes_nuts Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 1996.
10246 1997_ArcticLTER_Lakes_nuts Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 1997.
10163 1998_ArcticLTER_Lakes_nuts Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 1998.

Sites sampled.

Download a comma delimited (csv) or Excel file (includes metadata and data sheets).

Use of the data requires acceptance of the data use policy --> Arctic LTER Data Use Policy

To cite this data set see the citation example on the LTER Network Data Portal page for this data set.

Variables Details

(Variables names are in the first line/row of the CSV file and Excel data sheet.)
SortChem_#
  • Label: SortChem_#
  • Definition: Number used to identify samples - generally not used until later data but column remains with older data to enable comparison
  • Type: Nominal
  • Missing values: None specified
Site
  • Label: Site
  • Definition: Site Name: Name of the lake where measurements were taken. There are discrete sampling sites defined by water depth, generally they are at the point of maximum depth.
  • Type: Nominal
  • Missing values: None specified
Date
  • Label: Date
  • Definition: Date readings were taken on.
  • Type: Date/time
  • Date format: dd-mmm-yyyy
  • Missing values: None specified
Depth (m)
  • Label: Depth (m)
  • Definition: Depth from surface of lake, stream, or soil starting from the surface as 0. This depth corresponds with data in other files (Primary Production, Physical Chemistry)
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Corrected_Chl_ug/L
  • Label: Corrected_Chl_ug/L
  • Definition: Chlorophyll- a corrected for pheophytin (aka Active Chlorophyll)
  • Type: Physical quantity
  • Unit: microgramPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Total_Chl_ug/l
  • Label: Total_Chl_ug/l
  • Definition: Total chlorophyll (uncorrected for pheophytin)
  • Type: Physical quantity
  • Unit: microgramPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Pheo (ug/L)
  • Label: Pheo (ug/L)
  • Definition: Pheophytin
  • Type: Physical quantity
  • Unit: microgramPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
NH4OPA_uM
  • Label: NH4OPA_uM
  • Definition: Ammonium concentrations from OPA fluorometric analysis
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
NH4 Indol_uM
  • Label: NH4 Indol_uM
  • Definition: Ammonium concentrations from indol/ phenol analysis
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
PO4_uM
  • Label: PO4_uM
  • Definition: phosphate concentrations from colormetric analysis
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
NO3_uM
  • Label: NO3_uM
  • Definition: nitrate+nitrite concentrations from colormetric analysis
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
TDN_uM
  • Label: TDN_uM
  • Definition: Total dissolved nitrogen
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
TN_uM
  • Label: TN_uM
  • Definition: Total nitrogen. This value is the sum of TDN and particulate nitrogen
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
TP_uM
  • Label: TP_uM
  • Definition: Total phosphorus. This value is the sum of TDP and particulate phosphorus
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
TDP_uM
  • Label: TDP_uM
  • Definition: Total dissolved phosphorus
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
PP-ug/l
  • Label: PP-ug/l
  • Definition: Particulate phosphorus
  • Type: Physical quantity
  • Unit: microgramPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
PP_uM
  • Label: PP_uM
  • Definition: Particulate phosphorus
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
PN-ug/l
  • Label: PN-ug/l
  • Definition: Particulate nitrogen
  • Type: Physical quantity
  • Unit: microgramPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
PN_uM
  • Label: PN_uM
  • Definition: Particulate nitrogen
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
PC-ug/l
  • Label: PC-ug/l
  • Definition: Particulate carbon
  • Type: Physical quantity
  • Unit: microgramPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
PC_uM
  • Label: PC_uM
  • Definition: Particulate carbon
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
DOC_uM
  • Label: DOC_uM
  • Definition: Dissolved organic carbon
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
DIC_uM
  • Label: DIC_uM
  • Definition: Dissolved inorganic carbon
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Alk_meqL
  • Label: Alk_meqL
  • Definition: Total alkalinity (carbonate and non-carbonate alkalinity)
  • Type: Physical quantity
  • Unit: milliequivalentPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
SO4_uM
  • Label: SO4_uM
  • Definition: Dissolved sulfate concentration
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Cl_uM
  • Label: Cl_uM
  • Definition: Dissolved chloride concentration
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Ca_uM
  • Label: Ca_uM
  • Definition: Dissolved calcium concentration
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Mg_uM
  • Label: Mg_uM
  • Definition: Dissolved magnesium concentration
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Na_uM
  • Label: Na_uM
  • Definition: Dissolved sodium concentration
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
K_uM
  • Label: K_uM
  • Definition: Dissolved potassium concentration
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Si_uM
  • Label: Si_uM
  • Definition: Silica concentration
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Notes
  • Label: Notes
  • Definition: Notes specific to the sample
  • Type: Nominal
  • Missing values: None specified