Weekly CTD profile measurements of conductivity, specific conductance, temperature, depth, density, and salinity from Lake Hoare, McMurdo Dry Valleys, Antarctica during the 2012-2013 austral summer

Summary

Abstract: 

As part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project, we investigated relationships between wind conditions and barotropic seiches within Lake Hoare, located in Taylor Valley, Antarctica, during the 2012-2013 austral summer. Temporal changes in the water column were measured using a rugged, handheld, CastAway CTD (conductivity-temperature-depth probe, manufactured by SonTek), deployed through the Lake Hoare Limno Hole (note, this is a separate instrument from the SeaBird CTD used as part of the MCM LTER core limnological monitoring program). The CastAway CTD directly measures temperature, electrical conductivity, and pressure at 5 Hz as it free-falls through the water column at a rate of approximately 1 m s-1 on the downward cast and approximately 0.3 m s-1 on the upward cast. The device calculates salinity and density using the International Equation of State for Seawater, called EOS-80. This data package provides 27 profiles of depth, temperature, conductivity, specific conductance, salinity, and density collected between November 25, 2012 and January 21, 2013. In general, three profiles were collected over a ten-minute-period every seven days for 57 days. Five profiles were collected prior to the arrival of spring melt, four profiles were collected during the arrival of spring melt on December 7, 2012, and 18 profiles were collected after the arrival of spring melt continuing into late summer.

Date Range: 

November 25, 2012 to January 21, 2013
Data Citation
Castendyk, D.N., Mcknight, D.M. 2021. Weekly CTD profile measurements of conductivity, specific conductance, temperature, depth, density, and salinity from Lake Hoare, McMurdo Dry Valleys, Antarctica during the 2012-2013 austral summer. Environmental Data Initiative. DOI: 10.6073/pasta/5209a86c4d0491715625d31b4d2c5c16. Dataset accessed 30 November 2021.
Dataset(s)

Variables (click to expand): 

DATASET_CODE
  • Label: Dataset code
  • Definition: Internal dataset code.
  • Type: Nominal
  • Missing values: None specified
LOCATION_NAME
  • Label: Location name
  • Definition: Name of lake where the measurement was made.
  • Type: Nominal
  • Missing values: None specified
LOCATION_CODE
  • Label: Location code
  • Definition: Internal location code, corresponding to core limno runs.
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date and time
  • Definition: Date and time when the measurement was made. New Zealand time zone, daylight savings time observed.
  • Type: Date/time
  • Date format: MM/DD/YYYY HH:MM
  • Missing values: None specified
CONDUCTIVITY_USCM
  • Label: Conductivity
  • Definition: Electrical conductivity of the water.
  • Type: Physical quantity
  • Unit: microSiemenPerCentimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
SPECIFIC_CONDUCTANCE_USCM
  • Label: Specific conductance
  • Definition: Electrical conductivity of the water at 25 degrees C.
  • Type: Physical quantity
  • Unit: microSiemenPerCentimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
TEMPERATURE_C
  • Label: Temperature
  • Definition: Water temperature.
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
DEPTH_M
  • Label: Depth
  • Definition: Distance below water surface.
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
DENSITY_KGM3
  • Label: Density
  • Definition: Density of the water calculated using EOS-80.
  • Type: Physical quantity
  • Unit: kilogramsPerMeterCubed
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
SALINITY_PSS
  • Label: Salinity
  • Definition: Oceanographic salinity of the water calculated using EOS-80.
  • Type: Physical quantity
  • Unit: practicalSalinityScale
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified

Short name: 

LIMNO_CACTD

Dataset ID: 

3105
People

Principal Investigator(s): 

Contact: 

Associated Personnel: 

Data Manager