ARC_Lakes_Physchem_2010-2018_csv

Date Range: 

Tuesday, June 15, 2010 to Friday, October 5, 2018

Physical and chemical data for various lakes near Toolik Research Station, Arctic LTER. Summer 2010 to 2018

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: YYYY-MM-DD
  • 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: 28
  • Minimum: -0.1
  • 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: 28.00
  • Minimum: -0.14
  • 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: Date/time
  • Date format: hh:mm
  • Missing values:
    • . = Missing or Not Measured
IBVSvr4a_V
  • Label: IBVSvr4a_V
  • Definition: Internal Battery Voltage of the Surveyor 4a Datalogger.
  • Type: Physical quantity
  • Unit: volt
  • Maximum: 12.6999998092651
  • Minimum: 0
  • 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: 19.11
  • Minimum: -0.105
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Cond_uS
  • Label: Cond_uS
  • Definition: Specific electrical conductivity of the water at depth.
  • Type: Physical quantity
  • Unit: microsiemenPerCentimeter
  • Maximum: 531.90
  • Minimum: 0.00
  • 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: 19.85
  • Minimum: 5.25
  • 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: 181
  • Minimum: -0.8
  • 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: 104.7
  • Minimum: -0.1
  • 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: 0
  • Minimum: 0
  • 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: 158.77
  • Minimum: -2.36
  • 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: 592.63
  • Minimum: -2.71
  • 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: 2524
  • Minimum: -0.199999988079071
  • 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: 0
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Hydrolab
  • Label: Hydrolab
  • Definition: This field indicates which Hydrolab Datasonde or CTD instrument was used to take measurements
  • Type: Code list
  • Codes:
    • 1 = Arctic LTER Hydrolab Datasonde DS5
    • 2 = Toolik Field Station Datasonde DS5
    • 3 = Arctic LTER Hydrolab Datasonde DS4a
    • 4 = O'Brian's Hydrolab (BP set at 760 mmHg)
    • 5 = LTER 6600V2 YSI Datasonde
    • 6 = LTER YSI EXO new 2018
  • Missing values:
    • . = Missing or Not Measured
Secchi_m
  • Label: Secchi_m
  • Definition: Measure of water transparency by depth a 22 cm Secchi Disk is visible to in meters (note where indicated "greater than" due to disk hitting the bottom before disappearing).
  • 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

Header lines: 

4

Orientation: 

Column

Quote character: 

"

Field delimiter: 

,

Record delimiter: 

\r\n

Number of Records: 

13194