Data

A 3D map of englacial attenuation rate from radar reflections at Law Dome, East Antarctica

Australian Ocean Data Network
Abdul Salam, Syed
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=01b862fd-6f8d-4d9a-8bd8-ad8567e498d9&rft.title=A 3D map of englacial attenuation rate from radar reflections at Law Dome, East Antarctica&rft.identifier=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=01b862fd-6f8d-4d9a-8bd8-ad8567e498d9&rft.description=The East Antarctic Ice Sheet (EAIS) is the largest source of potential sea-level rise, containing some 19 m of sea-level equivalent. One of the well-investigated regions in East Antarctica is Law Dome, which is a small independent ice cap situated to the west of Totten Ice Shelf. The ice cap is slow-moving, has a low melt-rate at the surface and moderate wind speeds, making it a useful study site for our investigations. Radar data from Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP) project has good coverage over this area. A new method is proposed for the estimation of attenuation rate from radar data which is mathematically modeled as a constrained regularised l2 minimization problem. In the proposed method, only radar data is required and the englacial reflectors are automatically detected from the radar data itself. A final product of 3D attenuation rates and 3D samples count is provided for the research community in this data set.Maintenance and Update Frequency: notPlannedStatement: This attenuation rate data set is obtained by detecting internal reflectors and estimating attenuation within ice using radar data from Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP ) project (https://nsidc.org/data/IR1HI1B/versions/1 and https://nsidc.org/data/IR2HI1B/versions/1) at Law Dome, East Antarctica. The englacial layers are detected with a minimum 60 m spacing between the layers and the attenuation rate is estimated using a mathematical model of constrained optimization. After the estimation of the radar attenuation, the data is post-processed to enhance the quality of the data. In the post-processing step, a 3D grid of 1 km x 1km x 60 m dimension is developed. As the flight lines in the original data provide dense coverage so each grid cell contains many samples (the median is selected among these samples). A second 3D grid is also generated which contains the values that how many samples are contributing to the corresponding grid cell of attenuation rate.&rft.creator=Abdul Salam, Syed &rft.date=2020&rft.coverage=westlimit=110.0782; southlimit=-68.0873; eastlimit=118.4557; northlimit=-65.1999&rft.coverage=westlimit=110.0782; southlimit=-68.0873; eastlimit=118.4557; northlimit=-65.1999&rft.coverage=uplimit=1300; downlimit=-100&rft.coverage=uplimit=1300; downlimit=-100&rft_rights=The data described in this record are the intellectual property of the University of Tasmania through the Institute for Marine and Antarctic Studies.&rft_rights= http://creativecommons.org/licenses/by/4.0/&rft_rights=http://i.creativecommons.org/l/by/4.0/88x31.png&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Graphic&rft_rights=Creative Commons Attribution 4.0 International License&rft_rights=http://creativecommons.org/international/&rft_rights=WWW:LINK-1.0-http--related&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Text&rft_rights=The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).&rft_rights=Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0&rft_subject=geoscientificInformation&rft_subject=attenuation&rft_subject=ice penetrating radar&rft_subject=Law Dome&rft_subject=GLACIERS/ICE SHEETS&rft_subject=EARTH SCIENCE&rft_subject=CRYOSPHERE&rft_subject=GLACIAL MEASUREMENTS&rft_subject=CLIMATE INDICATORS&rft_subject=CRYOSPHERIC INDICATORS&rft_subject=Environmental Monitoring&rft_subject=ENVIRONMENTAL SCIENCES&rft_subject=ENVIRONMENTAL SCIENCE AND MANAGEMENT&rft_subject=Climate Change Processes&rft_subject=EARTH SCIENCES&rft_subject=ATMOSPHERIC SCIENCES&rft_subject=Glaciology&rft_subject=PHYSICAL GEOGRAPHY AND ENVIRONMENTAL GEOSCIENCE&rft_subject=Attenuation rate&rft_subject=Count samples&rft_subject=easting&rft_subject=northing&rft_subject=altitude&rft.type=dataset&rft.language=English Access the data
Cite Saved to MyRDA Save to MyRDA

Licence & Rights:

Open Licence view details
CC-BY

http://creativecommons.org/licenses/by/4.0/

Creative Commons Attribution 4.0 International License
http://creativecommons.org/licenses/by/4.0

The data described in this record are the intellectual property of the University of Tasmania through the Institute for Marine and Antarctic Studies.

http://i.creativecommons.org/l/by/4.0/88x31.png

WWW:LINK-1.0-http--related

License Graphic

Creative Commons Attribution 4.0 International License

http://creativecommons.org/international/

WWW:LINK-1.0-http--related

WWW:LINK-1.0-http--related

License Text

The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).

Access:

Open

Brief description

The East Antarctic Ice Sheet (EAIS) is the largest source of potential sea-level rise, containing some 19 m of sea-level equivalent. One of the well-investigated regions in East Antarctica is Law Dome, which is a small independent ice cap situated to the west of Totten Ice Shelf. The ice cap is slow-moving, has a low melt-rate at the surface and moderate wind speeds, making it a useful study site for our investigations. Radar data from Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP) project has good coverage over this area. A new method is proposed for the estimation of attenuation rate from radar data which is mathematically modeled as a constrained regularised l2 minimization problem. In the proposed method, only radar data is required and the englacial reflectors are automatically detected from the radar data itself. A final product of 3D attenuation rates and 3D samples count is provided for the research community in this data set.

Lineage

Maintenance and Update Frequency: notPlanned
Statement: This attenuation rate data set is obtained by detecting internal reflectors and estimating attenuation within ice using radar data from Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP ) project (https://nsidc.org/data/IR1HI1B/versions/1 and https://nsidc.org/data/IR2HI1B/versions/1) at Law Dome, East Antarctica. The englacial layers are detected with a minimum 60 m spacing between the layers and the attenuation rate is estimated using a mathematical model of constrained optimization. After the estimation of the radar attenuation, the data is post-processed to enhance the quality of the data. In the post-processing step, a 3D grid of 1 km x 1km x 60 m dimension is developed. As the flight lines in the original data provide dense coverage so each grid cell contains many samples (the median is selected among these samples). A second 3D grid is also generated which contains the values that how many samples are contributing to the corresponding grid cell of attenuation rate.

Notes

Credit
Australian Research Council’s Special Research Initiative for Antarctic Gateway Partnership (Project ID SR140300001)
Credit
Australian Antarctic Division (Project IDs 3103, 4077 and 4346)

Data time period: 2017-06-12 to 2020-01-01

This dataset is part of a larger collection

Click to explore relationships graph
Help

Related Organisations

Related People

118.4557,-65.1999 118.4557,-68.0873 110.0782,-68.0873 110.0782,-65.1999 118.4557,-65.1999

114.26695,-66.6436

text: westlimit=110.0782; southlimit=-68.0873; eastlimit=118.4557; northlimit=-65.1999

text: uplimit=1300; downlimit=-100

Subjects
Atmospheric Sciences | Attenuation rate | CLIMATE INDICATORS | CRYOSPHERE | CRYOSPHERIC INDICATORS | Climate Change Processes | Count samples | EARTH SCIENCE | Earth Sciences | Environmental Science and Management | Environmental Sciences | Environmental Monitoring | GLACIAL MEASUREMENTS | GLACIERS/ICE SHEETS | Glaciology | Law Dome | Physical Geography and Environmental Geoscience | altitude | attenuation | easting | geoscientificInformation | ice penetrating radar | northing |

User Contributed Tags    

Login to tag this record with meaningful keywords to make it easier to discover

Other Information
(DATA ACCESS - Attenuation rate [.nc direct download])

uri : https://data.imas.utas.edu.au/attachments/01b862fd-6f8d-4d9a-8bd8-ad8567e498d9/Attenuation_rate.nc

(DATA ACCESS - Count of samples [.nc direct download])

uri : https://data.imas.utas.edu.au/attachments/01b862fd-6f8d-4d9a-8bd8-ad8567e498d9/Count_samples.nc

Identifiers
  • global : 01b862fd-6f8d-4d9a-8bd8-ad8567e498d9
Similar data you may be interested in: