Lake ice thickness and density measurements, McMurdo Dry Valleys, Antarctica (1989-2022, ongoing)

Summary

Abstract: 

As part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project, ice thickness and density are measured annually for several lakes located throughout this region of Antarctica. Ice thickness is 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 m2 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: 

November 16, 1989 to January 8, 2022
Data Citation
Priscu, J. 2022. Lake ice thickness and density measurements, McMurdo Dry Valleys, Antarctica (1989-2022, ongoing). Environmental Data Initiative. DOI: 10.6073/pasta/b4e035b7670496a302c42050d01ba6d7. Dataset accessed 1 July 2022.
Dataset(s)

Description: 

Ice Thickness

Variables (click to expand): 

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

Dataset ID: 

67
People

Principal Investigator(s): 

Contact: 

Associated Personnel: 

Field Technician
Data Manager
Former Field Crew
Former Data Manager
Former Data Manager