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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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00028270 2023-05-15T13:36:44+02:00 A comparison of basal reflectivity and ice velocity in East Antarctica Jacobel, R. W. Lapo, K. E. Stamp, J. R. Youngblood, B. W. Welch, B. C. Bamber, J. L. 2010-10 electronic https://doi.org/10.5194/tc-4-447-2010 https://noa.gwlb.de/receive/cop_mods_00028270 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028225/tc-4-447-2010.pdf https://tc.copernicus.org/articles/4/447/2010/tc-4-447-2010.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-4-447-2010 https://noa.gwlb.de/receive/cop_mods_00028270 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028225/tc-4-447-2010.pdf https://tc.copernicus.org/articles/4/447/2010/tc-4-447-2010.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2010 ftnonlinearchiv https://doi.org/10.5194/tc-4-447-2010 2022-02-08T22:48:17Z 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 Niedersächsisches Online-Archiv NOA East Antarctica Ross Ice Shelf The Cryosphere 4 4 447 452 |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Jacobel, R. W. Lapo, K. E. Stamp, J. R. Youngblood, B. W. Welch, B. C. Bamber, J. L. A comparison of basal reflectivity and ice velocity in East Antarctica |
topic_facet |
article Verlagsveröffentlichung |
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 |
Jacobel, R. W. Lapo, K. E. Stamp, J. R. Youngblood, B. W. Welch, B. C. Bamber, J. L. |
author_facet |
Jacobel, R. W. Lapo, K. E. Stamp, J. R. Youngblood, B. W. Welch, B. C. Bamber, J. L. |
author_sort |
Jacobel, R. W. |
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://noa.gwlb.de/receive/cop_mods_00028270 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028225/tc-4-447-2010.pdf https://tc.copernicus.org/articles/4/447/2010/tc-4-447-2010.pdf |
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_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-4-447-2010 https://noa.gwlb.de/receive/cop_mods_00028270 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028225/tc-4-447-2010.pdf https://tc.copernicus.org/articles/4/447/2010/tc-4-447-2010.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
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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1766083136579436544 |