A comparison of basal reflectivity and ice velocity in East Antarctica
Ground-based radio echo sounding data acquired along the 1700 km US-ITASE traverse have been used to determine ice attenuation and relative basal reflectivity across the major catchments funneling ice from East Antarctica to the Ross Ice Shelf. We find that basal reflectivity varies locally by up to...
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ftdoajarticles:oai:doaj.org/article:956f075a20f94b40bfb6b4659dc7f3fe 2023-05-15T13:37:56+02:00 A comparison of basal reflectivity and ice velocity in East Antarctica R. W. Jacobel K. E. Lapo J. R. Stamp B. W. Youngblood B. C. Welch J. L. Bamber 2010-10-01T00:00:00Z https://doi.org/10.5194/tc-4-447-2010 https://doaj.org/article/956f075a20f94b40bfb6b4659dc7f3fe EN eng Copernicus Publications http://www.the-cryosphere.net/4/447/2010/tc-4-447-2010.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-4-447-2010 1994-0416 1994-0424 https://doaj.org/article/956f075a20f94b40bfb6b4659dc7f3fe The Cryosphere, Vol 4, Iss 4, Pp 447-452 (2010) Environmental sciences GE1-350 Geology QE1-996.5 article 2010 ftdoajarticles https://doi.org/10.5194/tc-4-447-2010 2022-12-31T03:00:40Z Ground-based radio echo sounding data acquired along the 1700 km US-ITASE traverse have been used to determine ice attenuation and relative basal reflectivity across the major catchments funneling ice from East Antarctica to the Ross Ice Shelf. We find that basal reflectivity varies locally by up to 40 dB which we interpret as due to changes in the phase state at the bed. Some, though not all, areas of high local reflectivity are observed to have flat-lying bed reflections indicative of sub-glacial lakes. We compare basal reflectivity to ice balance velocity and find a general association of higher flow speeds with high radar reflection strength. This set of observations from two independent remotely sensed geophysical data sets extends the range of field observations to the interior of East Antarctica and confirms the importance of basal lubrication on modulating the ice dynamics of the largest ice sheet on the planet. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Ice Sheet Ice Shelf Ross Ice Shelf The Cryosphere Directory of Open Access Journals: DOAJ Articles East Antarctica Ross Ice Shelf The Cryosphere 4 4 447 452 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 R. W. Jacobel K. E. Lapo J. R. Stamp B. W. Youngblood B. C. Welch J. L. Bamber A comparison of basal reflectivity and ice velocity in East Antarctica |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Ground-based radio echo sounding data acquired along the 1700 km US-ITASE traverse have been used to determine ice attenuation and relative basal reflectivity across the major catchments funneling ice from East Antarctica to the Ross Ice Shelf. We find that basal reflectivity varies locally by up to 40 dB which we interpret as due to changes in the phase state at the bed. Some, though not all, areas of high local reflectivity are observed to have flat-lying bed reflections indicative of sub-glacial lakes. We compare basal reflectivity to ice balance velocity and find a general association of higher flow speeds with high radar reflection strength. This set of observations from two independent remotely sensed geophysical data sets extends the range of field observations to the interior of East Antarctica and confirms the importance of basal lubrication on modulating the ice dynamics of the largest ice sheet on the planet. |
format |
Article in Journal/Newspaper |
author |
R. W. Jacobel K. E. Lapo J. R. Stamp B. W. Youngblood B. C. Welch J. L. Bamber |
author_facet |
R. W. Jacobel K. E. Lapo J. R. Stamp B. W. Youngblood B. C. Welch J. L. Bamber |
author_sort |
R. W. Jacobel |
title |
A comparison of basal reflectivity and ice velocity in East Antarctica |
title_short |
A comparison of basal reflectivity and ice velocity in East Antarctica |
title_full |
A comparison of basal reflectivity and ice velocity in East Antarctica |
title_fullStr |
A comparison of basal reflectivity and ice velocity in East Antarctica |
title_full_unstemmed |
A comparison of basal reflectivity and ice velocity in East Antarctica |
title_sort |
comparison of basal reflectivity and ice velocity in east antarctica |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/tc-4-447-2010 https://doaj.org/article/956f075a20f94b40bfb6b4659dc7f3fe |
geographic |
East Antarctica Ross Ice Shelf |
geographic_facet |
East Antarctica Ross Ice Shelf |
genre |
Antarc* Antarctica East Antarctica Ice Sheet Ice Shelf Ross Ice Shelf The Cryosphere |
genre_facet |
Antarc* Antarctica East Antarctica Ice Sheet Ice Shelf Ross Ice Shelf The Cryosphere |
op_source |
The Cryosphere, Vol 4, Iss 4, Pp 447-452 (2010) |
op_relation |
http://www.the-cryosphere.net/4/447/2010/tc-4-447-2010.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-4-447-2010 1994-0416 1994-0424 https://doaj.org/article/956f075a20f94b40bfb6b4659dc7f3fe |
op_doi |
https://doi.org/10.5194/tc-4-447-2010 |
container_title |
The Cryosphere |
container_volume |
4 |
container_issue |
4 |
container_start_page |
447 |
op_container_end_page |
452 |
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1766099676427190272 |