Sensitivity of ocean circulation and sea-ice conditions to loss of West Antarctic ice shelves and ice sheet
ABSTRACT. We use a global coupled ocean–sea ice model to test the hypothesis that the disintegration of the West Antarctic ice sheet (WAIS), or just its ice shelves, may modify ocean circulation and sea-ice conditions in the Southern Ocean. We compare the results of three model runs: (1) a control r...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.634.5627 2023-05-15T13:37:45+02:00 Sensitivity of ocean circulation and sea-ice conditions to loss of West Antarctic ice shelves and ice sheet Marion Bougamont Elizabeth C. Hunke Slawek Tulaczyk The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.5627 http://www.igsoc.org/journal/53/182/J06J080.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.5627 http://www.igsoc.org/journal/53/182/J06J080.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.igsoc.org/journal/53/182/J06J080.pdf text ftciteseerx 2016-01-08T15:38:17Z ABSTRACT. We use a global coupled ocean–sea ice model to test the hypothesis that the disintegration of the West Antarctic ice sheet (WAIS), or just its ice shelves, may modify ocean circulation and sea-ice conditions in the Southern Ocean. We compare the results of three model runs: (1) a control run with a standard (modern) configuration of landmask in West Antarctica, (2) a no-shelves run with West Antarctic ice shelves removed and (3) a no-WAIS run. In the latter two runs, up to a few million square kilometres of new sea surface area opens to sea-ice formation, causing the volume and extent of Antarctic sea-ice cover to increase compared with the control run. In general, near-surface waters are cooler around Antarctica in the no-shelves and no-WAIS model runs than in the control run, while warm intermediate and deep waters penetrate further south, increasing poleward heat transport. Varying regional responses to the imposed changes in landmask configuration are determined by the fact that Antarctic polynyas and fast ice develop in different parts of the model domain in each run. Model results suggest that changes in the extent of WAIS may modify oceanographic conditions in the Southern Ocean. Text Antarc* Antarctic Antarctica Ice Sheet Ice Shelves Sea ice Southern Ocean West Antarctica Unknown Antarctic Southern Ocean West Antarctic Ice Sheet West Antarctica |
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English |
description |
ABSTRACT. We use a global coupled ocean–sea ice model to test the hypothesis that the disintegration of the West Antarctic ice sheet (WAIS), or just its ice shelves, may modify ocean circulation and sea-ice conditions in the Southern Ocean. We compare the results of three model runs: (1) a control run with a standard (modern) configuration of landmask in West Antarctica, (2) a no-shelves run with West Antarctic ice shelves removed and (3) a no-WAIS run. In the latter two runs, up to a few million square kilometres of new sea surface area opens to sea-ice formation, causing the volume and extent of Antarctic sea-ice cover to increase compared with the control run. In general, near-surface waters are cooler around Antarctica in the no-shelves and no-WAIS model runs than in the control run, while warm intermediate and deep waters penetrate further south, increasing poleward heat transport. Varying regional responses to the imposed changes in landmask configuration are determined by the fact that Antarctic polynyas and fast ice develop in different parts of the model domain in each run. Model results suggest that changes in the extent of WAIS may modify oceanographic conditions in the Southern Ocean. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Marion Bougamont Elizabeth C. Hunke Slawek Tulaczyk |
spellingShingle |
Marion Bougamont Elizabeth C. Hunke Slawek Tulaczyk Sensitivity of ocean circulation and sea-ice conditions to loss of West Antarctic ice shelves and ice sheet |
author_facet |
Marion Bougamont Elizabeth C. Hunke Slawek Tulaczyk |
author_sort |
Marion Bougamont |
title |
Sensitivity of ocean circulation and sea-ice conditions to loss of West Antarctic ice shelves and ice sheet |
title_short |
Sensitivity of ocean circulation and sea-ice conditions to loss of West Antarctic ice shelves and ice sheet |
title_full |
Sensitivity of ocean circulation and sea-ice conditions to loss of West Antarctic ice shelves and ice sheet |
title_fullStr |
Sensitivity of ocean circulation and sea-ice conditions to loss of West Antarctic ice shelves and ice sheet |
title_full_unstemmed |
Sensitivity of ocean circulation and sea-ice conditions to loss of West Antarctic ice shelves and ice sheet |
title_sort |
sensitivity of ocean circulation and sea-ice conditions to loss of west antarctic ice shelves and ice sheet |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.5627 http://www.igsoc.org/journal/53/182/J06J080.pdf |
geographic |
Antarctic Southern Ocean West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Antarctic Southern Ocean West Antarctic Ice Sheet West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelves Sea ice Southern Ocean West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelves Sea ice Southern Ocean West Antarctica |
op_source |
http://www.igsoc.org/journal/53/182/J06J080.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.5627 http://www.igsoc.org/journal/53/182/J06J080.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766097242544930816 |