Ice Thickness for Taylor Valley Lakes, Antarctica

Summary

Abstract: 

Ice thickness was measured from the bottom of the ice cover to the piezometric water level and to the top of the ice cover. Because most limnological sampling holes are drilled in low-lying areas, it was thought that ice thickness measurements were biased. Therefore, random ice thickness measurements were performed in a 1000 m^2 sampling grid on each lake in past years. Statistical analyses by Dr. Priscu have shown that measurements from three ice holes are representative of the ice thickness measured by this grid system.

Date Range: 

Thursday, November 16, 1989 to Monday, January 8, 2018
Details about the spreadsheet containing the Ice Thickness data: Units used, number of columns, definitions and other details that may come handy to manipulate and interpret the data.

Variables: 

DATASET_CODE
  • Label:
  • Definition: Code that designates the name of the data table in the database
  • Type: Nominal
  • Missing values: None specified
LAKE
  • Label: Lake
  • Definition: Name of lake where measurement was made
  • Type: Nominal
  • Missing values: None specified
LOCATION NAME
  • Label: Location Name
  • Definition: Specifics of ice hole site upon lake. Locations designated by numbers are distances in meters, south and east,respectively, from the blue box
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date Time
  • Definition: Date on which sample was gathered
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values: None specified
Z-WATER (m)
  • Label: Z-water (m)
  • Definition: Distance from piezometric water level to bottom of ice (negative value)
  • Type: Physical quantity
  • Unit: meter
  • Maximum: 0
  • Minimum: -10
  • Precision: 0.01
  • Missing values: None specified
Z-ICE (m)
  • Label: Z-ice (m)
  • Definition: Distance from bottom of ice to top of ice (total ice thickness)
  • Type: Physical quantity
  • Unit: meter
  • Maximum: 10
  • Minimum: 0
  • Precision: 0.01
  • Missing values:
    • Null = None given
Z-DIFF (m)
  • Label: Z-diff (m)
  • Definition: Distance from piezometric water level to top of ice (positive value)
  • Type: Physical quantity
  • Unit: meter
  • Maximum: 5
  • Minimum: 0
  • Precision: 0.01
  • Missing values:
    • Null = None given
DENSITY
  • Label: Density
  • Definition: Density of ice
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 1
  • Minimum: 0
  • Precision: 0.0001
  • Missing values:
    • Null = None Given
TOOL
  • Label: Tool
  • Definition: Tool used to gather sample
  • Type: Nominal
  • Missing values: None specified
COMMENTS
  • Label: Comments
  • Definition: Helpful hints about the ice thickness measurement
  • Type: Nominal
  • Missing values: None specified
FILE NAME
  • Label: File Name
  • Definition: Name of file in which data was submitted
  • Type: Nominal
  • Missing values: None specified
LAT
  • Label: Latitude
  • Definition: Point Latitude of the whole where measurement was made
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 1
  • Minimum: 0
  • Precision: 0.0001
  • Missing values:
    • Null = None given
LON
  • Label: Longitude
  • Definition: Point Longitude of the whole where measurement was taken
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 1
  • Minimum: 0
  • Precision: 0.0001
  • Missing values:
    • Null = None given

Short name: 

icethickness

Data set ID: 

67
Published in the EDI Data Repository

Data Citation: 

Priscu, J. 2018. McMurdo Dry Valleys LTER: Ice Thickness for Taylor Valley Lakes, Antarctica. Environmental Data Initiative. DOI: 10.6073/pasta/09128d1df7d7ae09cba3e26aaebc9bef. Dataset accessed 17 August 2019.
People

Principal Investigator(s): 

Contact: 

Associated Personnel: 

Field Crew
Data Manager
Data Manager
Data Manager