Data

Antarctica - Wilkes Land snow / firn temperatures

data.gov.au
Australian Antarctic Division (Owned by)
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://data.gov.au/dataset/c58ff8c8-0d5e-44d4-a152-43451f25e1e5&rft.title=Antarctica - Wilkes Land snow / firn temperatures&rft.identifier=aad-aad-ant-wld-firn-temp&rft.publisher=data.gov.au&rft.description=Point of truth URL of this metadata record - Point of truth URL of this metadata recordDownload point for the data - csv file - Download point for the data - csv filePublic information for ASAC project 456 - Public information for ASAC project 456Public information for ASAC project 458 - Public information for ASAC project 458Citation reference for this metadata record and dataset - Citation reference for this metadata record and datasetMeasurements of temperature within the snow / firn cover in Wilkes Land East Antarctica were made along the routes of oversnow traverses operating out of Casey (66.6 S 110 E). In general, measurements were made at a nominal depth of ten metres as a first estimate of mean annual surface temperature of the ice sheet, and for many sites, at some additional depths, typically around twenty metres. Actual depths of measurements are included with the temperature data as well as date of observation. No attempt has been made to apply any correction for seasonal or interannual variation.\n\nTwo different methods were used to drill the access holes: an ice coring auger (usually PICO drill, originally SIPRE drill); a steam drill. In some areas depth of drilling was limited by problems associated with the texture of the firn and difficulties in recovery of material from the hole.\n\nWhere relevant, date of drilling is included with the data, or time elapsed between drilling and temperature measurement. Temperature measurements were made using 100 ohm platinum resistance elements with resistance measured using a 'Leeds and Northrup' resistance bridge. The bridge uses a zero/nul measurement technique, thus avoiding heating effects in the sensor Refer quality entry for further details).\n\nThese data form part of the data collected for ASAC projects 456 (Properties and Structure of Antarctic Snow and Ice ), 458 (Characteristics, Dynamics and Mass Budget of the Ice Sheet in Wilkes Land ) and 2224 (Glacier dynamics and mass discharge from the Antarctic ice sheet, 45 degrees -160 degrees E) - ASAC_456, ASAC_458, ASAC_2224).\n\nThe fields in this dataset are:\n\nsite_id (the marker code of the measurement site)\n\nobservation_date (date on which measurement was made, in ISO8601 format yyyy-mm-dd)\n\nobservation_date_year (year of measurement date)\n\nobservation_date_month (month of measurement date)\n\nobservation_date_day (day of measurement date)\n\ntemperature (degrees C)\n\ndepth_of_observation (m)\n\nlatitude\n\nlongitude\n\ndrill_type\n\ndate_drilled\n\ncomment\n\ndays_between_drilling_and_measurement\n\n&rft.creator=Australian Antarctic Division&rft.date=2023&rft.coverage=94.0,-74.5 131.0,-74.5 131.0,-68.0 94.0,-68.0 94.0,-74.5&rft.coverage=94.0,-74.5 131.0,-74.5 131.0,-68.0 94.0,-68.0 94.0,-74.5&rft_rights=Creative Commons Attribution 3.0 Australia http://creativecommons.org/licenses/by/3.0/au/&rft_subject=AMD&rft_subject=AMD-AU&rft_subject=ANTARCTICA&rft_subject=CEOS&rft_subject=COMMENTS&rft_subject=CONTINENT - ANTARCTICA&rft_subject=DATE&rft_subject=DEPTH&rft_subject=DRILL&rft_subject=EARTH SCIENCE - CRYOSPHERE - SNOW-ICE - SNOW-ICE TEMPERATURE&rft_subject=FIRN&rft_subject=GEOGRAPHIC REGION - POLAR&rft_subject=LATITUDE&rft_subject=LONGITUDE&rft_subject=MARKER&rft_subject=SNOW&rft_subject=SURFACE&rft_subject=TEMPERATURE&rft_subject=TIME&rft_subject=WILKES LAND&rft.type=dataset&rft.language=English Access the data
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Creative Commons Attribution 3.0 Australia
http://creativecommons.org/licenses/by/3.0/au/

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Brief description

Measurements of temperature within the snow / firn cover in Wilkes Land East Antarctica were made along the routes of oversnow traverses operating out of Casey (66.6 S 110 E). In general, measurements were made at a nominal depth of ten metres as a first estimate of mean annual surface temperature of the ice sheet, and for many sites, at some additional depths, typically around twenty metres. Actual depths of measurements are included with the temperature data as well as date of observation. No attempt has been made to apply any correction for seasonal or interannual variation.

Two different methods were used to drill the access holes: an ice coring auger (usually PICO drill, originally SIPRE drill); a steam drill. In some areas depth of drilling was limited by problems associated with the texture of the firn and difficulties in recovery of material from the hole.

Where relevant, date of drilling is included with the data, or time elapsed between drilling and temperature measurement. Temperature measurements were made using 100 ohm platinum resistance elements with resistance measured using a 'Leeds and Northrup' resistance bridge. The bridge uses a zero/nul measurement technique, thus avoiding heating effects in the sensor Refer quality entry for further details).

These data form part of the data collected for ASAC projects 456 (Properties and Structure of Antarctic Snow and Ice ), 458 (Characteristics, Dynamics and Mass Budget of the Ice Sheet in Wilkes Land ) and 2224 (Glacier dynamics and mass discharge from the Antarctic ice sheet, 45 degrees -160 degrees E) - ASAC_456, ASAC_458, ASAC_2224).

The fields in this dataset are:

site_id (the marker code of the measurement site)

observation_date (date on which measurement was made, in ISO8601 format yyyy-mm-dd)

observation_date_year (year of measurement date)

observation_date_month (month of measurement date)

observation_date_day (day of measurement date)

temperature (degrees C)

depth_of_observation (m)

latitude

longitude

drill_type

date_drilled

comment

days_between_drilling_and_measurement

Full description

Point of truth URL of this metadata record - Point of truth URL of this metadata record
Download point for the data - csv file - Download point for the data - csv file
Public information for ASAC project 456 - Public information for ASAC project 456
Public information for ASAC project 458 - Public information for ASAC project 458
Citation reference for this metadata record and dataset - Citation reference for this metadata record and dataset

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94,-74.5 131,-74.5 131,-68 94,-68 94,-74.5

112.5,-71.25

94,-74.5 131,-74.5 131,-68 94,-68 94,-74.5

112.5,-71.25

Subjects
AMD | AMD-AU | ANTARCTICA | CEOS | COMMENTS | CONTINENT - ANTARCTICA | DATE | DEPTH | DRILL | EARTH SCIENCE - CRYOSPHERE - SNOW-ICE - SNOW-ICE TEMPERATURE | FIRN | GEOGRAPHIC REGION - POLAR | LATITUDE | LONGITUDE | MARKER | SNOW | SURFACE | TEMPERATURE | TIME | WILKES LAND |

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