Multisystem Synthesis of Radar Sounding Observations of the Amundsen Sea Sector From the 2004–2005 Field Season
The Amundsen Sea Embayment of the West Antarctic Ice Sheet contains Thwaites and Pine Island Glaciers, two of the most rapidly changing glaciers in Antarctica. To date, Pine Island and Thwaites Glaciers have only been observed by independent airborne radar sounding surveys, but a combined cross‐basi...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9286636/ http://www.ncbi.nlm.nih.gov/pubmed/35865452 https://doi.org/10.1029/2021JF006296 |
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ftpubmed:oai:pubmedcentral.nih.gov:9286636 2023-05-15T13:23:51+02:00 Multisystem Synthesis of Radar Sounding Observations of the Amundsen Sea Sector From the 2004–2005 Field Season Chu, Winnie Hilger, Andrew M. Culberg, Riley Schroeder, Dustin M. Jordan, Thomas M. Seroussi, Helene Young, Duncan A. Blankenship, Donald D. Vaughan, David G. 2021-10-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9286636/ http://www.ncbi.nlm.nih.gov/pubmed/35865452 https://doi.org/10.1029/2021JF006296 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9286636/ http://www.ncbi.nlm.nih.gov/pubmed/35865452 http://dx.doi.org/10.1029/2021JF006296 © 2021. The Authors. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY J Geophys Res Earth Surf Research Article Text 2021 ftpubmed https://doi.org/10.1029/2021JF006296 2022-07-31T01:44:33Z The Amundsen Sea Embayment of the West Antarctic Ice Sheet contains Thwaites and Pine Island Glaciers, two of the most rapidly changing glaciers in Antarctica. To date, Pine Island and Thwaites Glaciers have only been observed by independent airborne radar sounding surveys, but a combined cross‐basin analysis that investigates the basal conditions across the Pine Island‐Thwaites Glaciers boundary has not been performed. Here, we combine two radar surveys and correct for their differences in system parameters to produce unified englacial attenuation and basal relative reflectivity maps spanning both Pine Island and Thwaites Glaciers. Relative reflectivities range from −24.8 to +37.4 dB with the highest values beneath fast‐flowing ice at the ice sheet margin. By comparing our reflectivity results with previously derived radar specularity and trailing bed echoes at Thwaites Glacier, we find a highly diverse subglacial landscape and hydrologic conditions that evolve along‐flow. Together, these findings highlight the potential for joint airborne radar analysis with ground‐based seismic and geomorphological observations to understand variations in the bed properties and cross‐catchment interactions of ice streams and outlet glaciers. Text Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Pine Island Thwaites Glacier PubMed Central (PMC) Amundsen Sea Antarctic Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) West Antarctic Ice Sheet Journal of Geophysical Research: Earth Surface 126 10 |
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PubMed Central (PMC) |
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English |
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Research Article |
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Research Article Chu, Winnie Hilger, Andrew M. Culberg, Riley Schroeder, Dustin M. Jordan, Thomas M. Seroussi, Helene Young, Duncan A. Blankenship, Donald D. Vaughan, David G. Multisystem Synthesis of Radar Sounding Observations of the Amundsen Sea Sector From the 2004–2005 Field Season |
topic_facet |
Research Article |
description |
The Amundsen Sea Embayment of the West Antarctic Ice Sheet contains Thwaites and Pine Island Glaciers, two of the most rapidly changing glaciers in Antarctica. To date, Pine Island and Thwaites Glaciers have only been observed by independent airborne radar sounding surveys, but a combined cross‐basin analysis that investigates the basal conditions across the Pine Island‐Thwaites Glaciers boundary has not been performed. Here, we combine two radar surveys and correct for their differences in system parameters to produce unified englacial attenuation and basal relative reflectivity maps spanning both Pine Island and Thwaites Glaciers. Relative reflectivities range from −24.8 to +37.4 dB with the highest values beneath fast‐flowing ice at the ice sheet margin. By comparing our reflectivity results with previously derived radar specularity and trailing bed echoes at Thwaites Glacier, we find a highly diverse subglacial landscape and hydrologic conditions that evolve along‐flow. Together, these findings highlight the potential for joint airborne radar analysis with ground‐based seismic and geomorphological observations to understand variations in the bed properties and cross‐catchment interactions of ice streams and outlet glaciers. |
format |
Text |
author |
Chu, Winnie Hilger, Andrew M. Culberg, Riley Schroeder, Dustin M. Jordan, Thomas M. Seroussi, Helene Young, Duncan A. Blankenship, Donald D. Vaughan, David G. |
author_facet |
Chu, Winnie Hilger, Andrew M. Culberg, Riley Schroeder, Dustin M. Jordan, Thomas M. Seroussi, Helene Young, Duncan A. Blankenship, Donald D. Vaughan, David G. |
author_sort |
Chu, Winnie |
title |
Multisystem Synthesis of Radar Sounding Observations of the Amundsen Sea Sector From the 2004–2005 Field Season |
title_short |
Multisystem Synthesis of Radar Sounding Observations of the Amundsen Sea Sector From the 2004–2005 Field Season |
title_full |
Multisystem Synthesis of Radar Sounding Observations of the Amundsen Sea Sector From the 2004–2005 Field Season |
title_fullStr |
Multisystem Synthesis of Radar Sounding Observations of the Amundsen Sea Sector From the 2004–2005 Field Season |
title_full_unstemmed |
Multisystem Synthesis of Radar Sounding Observations of the Amundsen Sea Sector From the 2004–2005 Field Season |
title_sort |
multisystem synthesis of radar sounding observations of the amundsen sea sector from the 2004–2005 field season |
publisher |
John Wiley and Sons Inc. |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9286636/ http://www.ncbi.nlm.nih.gov/pubmed/35865452 https://doi.org/10.1029/2021JF006296 |
long_lat |
ENVELOPE(-106.750,-106.750,-75.500,-75.500) |
geographic |
Amundsen Sea Antarctic Thwaites Glacier West Antarctic Ice Sheet |
geographic_facet |
Amundsen Sea Antarctic Thwaites Glacier West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Pine Island Thwaites Glacier |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Pine Island Thwaites Glacier |
op_source |
J Geophys Res Earth Surf |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9286636/ http://www.ncbi.nlm.nih.gov/pubmed/35865452 http://dx.doi.org/10.1029/2021JF006296 |
op_rights |
© 2021. The Authors. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2021JF006296 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
126 |
container_issue |
10 |
_version_ |
1766375789013499904 |