ARC_Lakes_Physchem_1990-1999_excel

Physical and chemical data for various lakes near Toolik Research Station, Arctic LTER. Summer 1990 to 1999

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Office spreadsheet icon ARC_Lakes_Physchem_1990-1999.xls (2.65 MB)

Variables

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
Rounded Depth (m)
  • Label: Rounded Depth (m)
  • Definition: Depth of water measurement taken at starting from the surface as 0. This depth corresponds with data in other files (Nutrients, Chemistry)
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Hydrolab Depth
  • Label: Hydrolab Depth
  • Definition: Depth measured by hydrolab (where used), otherwise regular measured depth recorded
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Time_hr_dst
  • Label: Time_hr_dst
  • Definition: Exact time that each reading was recorded in Alaska Daylight Savings Time (1 hour ahead of Alaska Standard Time: if 13:00 DST than 12:00 AST)
  • Type: Nominal
  • Missing values: None specified
IBVSvr4a_V
  • Label: IBVSvr4a_V
  • Definition: Internal Battery Voltage of the Surveyor 4a Datalogger.
  • Type: Physical quantity
  • Unit: volt
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Temp_C
  • Label: Temp_C
  • Definition: Water temperature at depth.
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Cond_uS
  • Label: Cond_uS
  • Definition: Electrical conductivity of the water at depth.
  • Type: Physical quantity
  • Unit: microsiemenPerCentimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
pH
  • Label: pH
  • Definition: pH (opposite of the log of the hydrogen ion concentration).
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
DO_Sat
  • Label: DO_Sat
  • Definition: The percent saturation of dissolved oxygen at depth.
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
DO_mg/l
  • Label: DO_mg/l
  • Definition: The concentration of dissolved oxygen at depth.
  • Type: Physical quantity
  • Unit: milligramPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
DO_umoles/L
  • Label: DO_umoles/L
  • Definition: The concentration of dissolved oxygen at depth.
  • Type: Physical quantity
  • Unit: micromolePerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Chl_V
  • Label: Chl_V
  • Definition: In Vivo measurement of chlorophyll-a concentration.
  • Type: Physical quantity
  • Unit: volt
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Chl_ug/l
  • Label: Chl_ug/l
  • Definition: In Vivo measurement of chlorophyll-a concentration.
  • Type: Physical quantity
  • Unit: microgramPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
PAR_uEm2s
  • Label: PAR_uEm2s
  • Definition: PAR (photosynthetically active radiation) measured below the water surface.
  • Type: Physical quantity
  • Unit: microEinsteinPerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
refPAR_uEm2s
  • Label: refPAR_uEm2s
  • Definition: PAR (photosynthetically active radiation) measured with Deck unit to correct for changes in ambient light.
  • Type: Physical quantity
  • Unit: microEinsteinPerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Hydrolab
  • Label: Hydrolab
  • Definition: Measure of water transparency by depth a Secchi Disk is visible to.
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Secchi_m
  • Label: Secchi_m
  • Definition: This field indicates which Hydrolab Datasonde instrument was used to take measurements
  • Type: Nominal
  • Missing values: None specified
Notes
  • Label: Notes
  • Definition: Any additional information pertaining to measurements made for a particular depth, place and time.
  • Type: Nominal
  • Missing values: None specified
Data Source Details

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