Inland thinning of the Amundsen Sea sector, West Antarctica
[1] Together with the Pine Island glacier (PIG), the Thwaites (TG) and Smith (SG) glaciers are the principal drainage systems of the Amundsen Sea (AS) sector of Western Antarctica. Here we use satellite radar altimetry and interferometry to show that a rapid thinning of ice has occurred within the f...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:99623 2024-10-13T14:01:17+00:00 Inland thinning of the Amundsen Sea sector, West Antarctica Shepherd, A Wingham, DJ Mansley, JAD 2002-05-15 application/pdf https://discovery.ucl.ac.uk/id/eprint/99623/1/2001GL014183.pdf https://discovery.ucl.ac.uk/id/eprint/99623/ eng eng AMER GEOPHYSICAL UNION https://discovery.ucl.ac.uk/id/eprint/99623/1/2001GL014183.pdf https://discovery.ucl.ac.uk/id/eprint/99623/ open Geophysical Research Letters , 29 (10) , Article 1364. (2002) Ice-sheet Radar interferometry Stream Glacier Motion Article 2002 ftucl 2024-09-30T07:42:09Z [1] Together with the Pine Island glacier (PIG), the Thwaites (TG) and Smith (SG) glaciers are the principal drainage systems of the Amundsen Sea (AS) sector of Western Antarctica. Here we use satellite radar altimetry and interferometry to show that a rapid thinning of ice has occurred within the fastest flowing sections of all AS outlet glaciers. The pattern of thinning extends to distances greater than 150 km inland. Between 1991 and 2001, the TG and SG thinned by more than 25 and 45 m at their grounding lines, and a total of 154 +/- 16 km(3) of ice (or 0.43 mm of eustatic sea level rise) was lost from the AS sector glaciers to the ocean. We show that the thickness changes may have caused the PIG, TG, and SG to retreat inland by over 8, 4, and 7 km respectively, in line with independent estimates of grounding line migration. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica University College London: UCL Discovery West Antarctica Amundsen Sea Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Ice-sheet Radar interferometry Stream Glacier Motion |
spellingShingle |
Ice-sheet Radar interferometry Stream Glacier Motion Shepherd, A Wingham, DJ Mansley, JAD Inland thinning of the Amundsen Sea sector, West Antarctica |
topic_facet |
Ice-sheet Radar interferometry Stream Glacier Motion |
description |
[1] Together with the Pine Island glacier (PIG), the Thwaites (TG) and Smith (SG) glaciers are the principal drainage systems of the Amundsen Sea (AS) sector of Western Antarctica. Here we use satellite radar altimetry and interferometry to show that a rapid thinning of ice has occurred within the fastest flowing sections of all AS outlet glaciers. The pattern of thinning extends to distances greater than 150 km inland. Between 1991 and 2001, the TG and SG thinned by more than 25 and 45 m at their grounding lines, and a total of 154 +/- 16 km(3) of ice (or 0.43 mm of eustatic sea level rise) was lost from the AS sector glaciers to the ocean. We show that the thickness changes may have caused the PIG, TG, and SG to retreat inland by over 8, 4, and 7 km respectively, in line with independent estimates of grounding line migration. |
format |
Article in Journal/Newspaper |
author |
Shepherd, A Wingham, DJ Mansley, JAD |
author_facet |
Shepherd, A Wingham, DJ Mansley, JAD |
author_sort |
Shepherd, A |
title |
Inland thinning of the Amundsen Sea sector, West Antarctica |
title_short |
Inland thinning of the Amundsen Sea sector, West Antarctica |
title_full |
Inland thinning of the Amundsen Sea sector, West Antarctica |
title_fullStr |
Inland thinning of the Amundsen Sea sector, West Antarctica |
title_full_unstemmed |
Inland thinning of the Amundsen Sea sector, West Antarctica |
title_sort |
inland thinning of the amundsen sea sector, west antarctica |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2002 |
url |
https://discovery.ucl.ac.uk/id/eprint/99623/1/2001GL014183.pdf https://discovery.ucl.ac.uk/id/eprint/99623/ |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
West Antarctica Amundsen Sea Pine Island Glacier |
geographic_facet |
West Antarctica Amundsen Sea Pine Island Glacier |
genre |
Amundsen Sea Antarc* Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica |
op_source |
Geophysical Research Letters , 29 (10) , Article 1364. (2002) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/99623/1/2001GL014183.pdf https://discovery.ucl.ac.uk/id/eprint/99623/ |
op_rights |
open |
_version_ |
1812809418923835392 |