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CTD profiles in lakes, McMurdo Dry Valleys, Antarctica (1993-2019, ongoing)
Summary
Abstract:
As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a series of Taylor Valley lakes have been monitored for conductivity, temperature and depth. A Seabird 25 CTD (conductivity, temperature, and depth) instrument was used to record temperature profiles in perennial ice covered lakes.
Date Range:
December 6, 1993
to
January 2, 2019
Data Citation
Priscu, J.
2022
.
CTD profiles in lakes, McMurdo Dry Valleys, Antarctica (1993-2019, ongoing)
.
Environmental Data Initiative. DOI:
10.6073/pasta/7532942ba96acc3b5c608633655f9de0
.
Dataset accessed 26 January 2023.
Dataset(s)
Variables (click to expand):
DATASET_CODE
Label:
Definition:
Code to identify the table - used by the data query system
Type:
Nominal
Missing values:
None specified
LIMNO_RUN
Label:
Definition:
Code for lake's sampling location and date
Type:
Nominal
Missing values:
None specified
LOCATION NAME
Label:
Location Name
Definition:
Name of lake where measurement was made
Type:
Nominal
Missing values:
None specified
LOCATION CODE
Label:
Location Code
Definition:
Code for site where measurement was made, a database integrity constraint too
Type:
Nominal
Missing values:
None specified
DEPTH (m)
Label:
Definition:
Depth (below the piezometric water level) derived from pressure using the Seabird software (d = p * 1.019716). Note: The upper 3-6 meters of each CTD cast, depending upon ice thickness for each lake, represents conditions within the ice melt hole and is not representative of actual lake water. It is advised that users of the data review the Lake Ice Thickness dataset in the MCM Database to find where the liquid water column starts for each cast.
Type:
Physical quantity
Unit:
meter
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
None specified
CTD CONDUCTIVITY (mS/cm)
Label:
CTD Conductivity (mS/cm)
Definition:
Conductivity measured at lake depth
Type:
Physical quantity
Unit:
milliSiemensPerCentimeter (mS/cm)
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
None specified
CTD TEMP (C)
Label:
Definition:
Temperature measured at lake depth
Type:
Physical quantity
Unit:
celsius
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
None specified
CTD COMMENTS
Label:
Definition:
Helpful hints about the CTD measurements
Type:
Nominal
Missing values:
None specified
FILE_NAME
Label:
Definition:
Name of file in which data was submitted
Type:
Nominal
Missing values:
None specified
DATE_TIME
Label:
Definition:
Date on which sample was gathered
Type:
Date/time
Date format:
MM/DD/YYYY
Missing values:
None specified
WIRE CORRECTED DEPTH (m)
Label:
Definition:
CTD Depth (see DEPTH) corrected with lake specific equations based on the relationship between CTD measured depths, and depths measured by a calibrated winch cable. These corrections are necessary because of the high density of the bottom waters of East and West Lake Bonney, and the offset in the pressure sensor output compared to the winch measured depth at the surface of all lakes.
Type:
Physical quantity
Unit:
meter
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
None specified
DEPTH MASL
Label:
Definition:
Depth referred to the Sea level. Distance below Mean Average Sea water level reference from which sample was drawn
Type:
Physical quantity
Unit:
meter
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
None specified
File:
mcmlter-lake-ctd-20220317.csv
(7.58 MB)
Short name:
limno ctd
Dataset ID:
88
People
Principal Investigator(s):
John Priscu
Contact:
McMurdo Dry Valleys LTER Information Manager
Associated Personnel:
Field Crew
Amy Chiuchiolo
Data Manager
Renée F. Brown
Former Data Manager
Inigo San Gil
Related
Related publications:
Evolution of Temperature and Salt Structure of Lake Bonney, a Chemically Stratified Antarctic Lake