Decadal Ocean Forcing and Antarctic Ice Sheet Response: Lessons from the Amundsen Sea
Mass loss from the Antarctic Ice Sheet is driven by changes at the marine margins. In the Amundsen Sea, thinning of the ice shelves has allowed the outlet glaciers to accelerate and thin, resulting in inland migration of their grounding lines. The ultimate driver is often assumed to be ocean warming...
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:34646 2023-05-15T13:23:39+02:00 Decadal Ocean Forcing and Antarctic Ice Sheet Response: Lessons from the Amundsen Sea Jenkins, Adrian Dutrieux, Pierre Jacobs, Stan Steig, Eric Gudmundsson, Hilmar Smith, James Heywood, Karen 2016-12-01 https://nrl.northumbria.ac.uk/id/eprint/34646/ https://doi.org/10.5670/oceanog.2016.103 unknown The Oceanography Society Jenkins, Adrian, Dutrieux, Pierre, Jacobs, Stan, Steig, Eric, Gudmundsson, Hilmar, Smith, James and Heywood, Karen (2016) Decadal Ocean Forcing and Antarctic Ice Sheet Response: Lessons from the Amundsen Sea. Oceanography, 29 (4). pp. 106-117. ISSN 1042-8275 F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2016 ftunivnorthumb https://doi.org/10.5670/oceanog.2016.103 2022-09-25T06:07:28Z Mass loss from the Antarctic Ice Sheet is driven by changes at the marine margins. In the Amundsen Sea, thinning of the ice shelves has allowed the outlet glaciers to accelerate and thin, resulting in inland migration of their grounding lines. The ultimate driver is often assumed to be ocean warming, but the recent record of ocean temperature is dominated by decadal variability rather than a trend. The distribution of water masses on the Amundsen Sea continental shelf is particularly sensitive to atmospheric forcing, while the regional atmospheric circulation is highly variable, at least in part because of the impact of tropical variability. Changes in atmospheric circulation force changes in ice shelf melting, which drive step-wise movement of the grounding line between localized high points on the bed. When the grounding line is located on a high point, outlet glacier flow is sensitive to atmosphere-ocean variability, but once retreat or advance to the next high point has been triggered, ocean circulation and melt rate changes associated with the evolution in geometry of the sub-ice-shelf cavity dominate, and the sensitivity to atmospheric forcing is greatly reduced. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Northumbria University, Newcastle: Northumbria Research Link (NRL) Amundsen Sea Antarctic The Antarctic Oceanography 29 4 106 117 |
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Open Polar |
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Northumbria University, Newcastle: Northumbria Research Link (NRL) |
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ftunivnorthumb |
language |
unknown |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Jenkins, Adrian Dutrieux, Pierre Jacobs, Stan Steig, Eric Gudmundsson, Hilmar Smith, James Heywood, Karen Decadal Ocean Forcing and Antarctic Ice Sheet Response: Lessons from the Amundsen Sea |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Mass loss from the Antarctic Ice Sheet is driven by changes at the marine margins. In the Amundsen Sea, thinning of the ice shelves has allowed the outlet glaciers to accelerate and thin, resulting in inland migration of their grounding lines. The ultimate driver is often assumed to be ocean warming, but the recent record of ocean temperature is dominated by decadal variability rather than a trend. The distribution of water masses on the Amundsen Sea continental shelf is particularly sensitive to atmospheric forcing, while the regional atmospheric circulation is highly variable, at least in part because of the impact of tropical variability. Changes in atmospheric circulation force changes in ice shelf melting, which drive step-wise movement of the grounding line between localized high points on the bed. When the grounding line is located on a high point, outlet glacier flow is sensitive to atmosphere-ocean variability, but once retreat or advance to the next high point has been triggered, ocean circulation and melt rate changes associated with the evolution in geometry of the sub-ice-shelf cavity dominate, and the sensitivity to atmospheric forcing is greatly reduced. |
format |
Article in Journal/Newspaper |
author |
Jenkins, Adrian Dutrieux, Pierre Jacobs, Stan Steig, Eric Gudmundsson, Hilmar Smith, James Heywood, Karen |
author_facet |
Jenkins, Adrian Dutrieux, Pierre Jacobs, Stan Steig, Eric Gudmundsson, Hilmar Smith, James Heywood, Karen |
author_sort |
Jenkins, Adrian |
title |
Decadal Ocean Forcing and Antarctic Ice Sheet Response: Lessons from the Amundsen Sea |
title_short |
Decadal Ocean Forcing and Antarctic Ice Sheet Response: Lessons from the Amundsen Sea |
title_full |
Decadal Ocean Forcing and Antarctic Ice Sheet Response: Lessons from the Amundsen Sea |
title_fullStr |
Decadal Ocean Forcing and Antarctic Ice Sheet Response: Lessons from the Amundsen Sea |
title_full_unstemmed |
Decadal Ocean Forcing and Antarctic Ice Sheet Response: Lessons from the Amundsen Sea |
title_sort |
decadal ocean forcing and antarctic ice sheet response: lessons from the amundsen sea |
publisher |
The Oceanography Society |
publishDate |
2016 |
url |
https://nrl.northumbria.ac.uk/id/eprint/34646/ https://doi.org/10.5670/oceanog.2016.103 |
geographic |
Amundsen Sea Antarctic The Antarctic |
geographic_facet |
Amundsen Sea Antarctic The Antarctic |
genre |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves |
op_relation |
Jenkins, Adrian, Dutrieux, Pierre, Jacobs, Stan, Steig, Eric, Gudmundsson, Hilmar, Smith, James and Heywood, Karen (2016) Decadal Ocean Forcing and Antarctic Ice Sheet Response: Lessons from the Amundsen Sea. Oceanography, 29 (4). pp. 106-117. ISSN 1042-8275 |
op_doi |
https://doi.org/10.5670/oceanog.2016.103 |
container_title |
Oceanography |
container_volume |
29 |
container_issue |
4 |
container_start_page |
106 |
op_container_end_page |
117 |
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1766373755768012800 |