Genesis of the Antarctic Slope Current in West Antarctica
The stability of the West Antarctic Ice Sheet (WAIS) depends on ocean heat transport toward its base and remains a source of uncertainty in sea level rise prediction. The Antarctic Slope Current (ASC), a major boundary current of the ocean's global circulation, serves as a dynamic gateway for h...
Published in: | Geophysical Research Letters |
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American Geophysical Union
2020
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ftcaltechauth:oai:authors.library.caltech.edu:105002 2023-05-15T13:38:16+02:00 Genesis of the Antarctic Slope Current in West Antarctica Thompson, Andrew F. Speer, Kevin G. Schulze Chretien, Lena M. 2020-08-28 application/pdf https://authors.library.caltech.edu/105002/ https://authors.library.caltech.edu/105002/1/2020GL087802.pdf https://authors.library.caltech.edu/105002/3/grl60853-sup-0001-2020gl087802-figure_si-s01.pdf https://resolver.caltech.edu/CaltechAUTHORS:20200818-125233247 en eng American Geophysical Union https://authors.library.caltech.edu/105002/1/2020GL087802.pdf https://authors.library.caltech.edu/105002/3/grl60853-sup-0001-2020gl087802-figure_si-s01.pdf Thompson, Andrew F. and Speer, Kevin G. and Schulze Chretien, Lena M. (2020) Genesis of the Antarctic Slope Current in West Antarctica. Geophysical Research Letters, 47 (16). Art. No. e2020GL087802. ISSN 0094-8276. doi:10.1029/2020gl087802. https://resolver.caltech.edu/CaltechAUTHORS:20200818-125233247 <https://resolver.caltech.edu/CaltechAUTHORS:20200818-125233247> other Article PeerReviewed 2020 ftcaltechauth https://doi.org/10.1029/2020gl087802 2021-11-18T18:59:04Z The stability of the West Antarctic Ice Sheet (WAIS) depends on ocean heat transport toward its base and remains a source of uncertainty in sea level rise prediction. The Antarctic Slope Current (ASC), a major boundary current of the ocean's global circulation, serves as a dynamic gateway for heat transport toward Antarctica. Here, we use observations collected from the Bellingshausen Sea to propose a mechanistic explanation for the initiation of the westward‐flowing ASC. Waters modified throughout the Bellingshausen Sea by ocean‐sea‐ice and ocean‐ice‐shelf interactions are exported to the continental slope in a narrow, topographically steered western boundary current. This focused outflow produces a localized front at the shelf break that supports the emerging ASC. This mechanism emphasizes the importance of buoyancy forcing, integrated over the continental shelf, as opposed to local wind forcing, in the generation mechanism and suggests the potential for remote control of melt rates of WAIS' largest ice shelves. Article in Journal/Newspaper Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Ice Shelves Sea ice West Antarctica Caltech Authors (California Institute of Technology) Antarctic Bellingshausen Sea The Antarctic West Antarctic Ice Sheet West Antarctica Geophysical Research Letters 47 16 |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
The stability of the West Antarctic Ice Sheet (WAIS) depends on ocean heat transport toward its base and remains a source of uncertainty in sea level rise prediction. The Antarctic Slope Current (ASC), a major boundary current of the ocean's global circulation, serves as a dynamic gateway for heat transport toward Antarctica. Here, we use observations collected from the Bellingshausen Sea to propose a mechanistic explanation for the initiation of the westward‐flowing ASC. Waters modified throughout the Bellingshausen Sea by ocean‐sea‐ice and ocean‐ice‐shelf interactions are exported to the continental slope in a narrow, topographically steered western boundary current. This focused outflow produces a localized front at the shelf break that supports the emerging ASC. This mechanism emphasizes the importance of buoyancy forcing, integrated over the continental shelf, as opposed to local wind forcing, in the generation mechanism and suggests the potential for remote control of melt rates of WAIS' largest ice shelves. |
format |
Article in Journal/Newspaper |
author |
Thompson, Andrew F. Speer, Kevin G. Schulze Chretien, Lena M. |
spellingShingle |
Thompson, Andrew F. Speer, Kevin G. Schulze Chretien, Lena M. Genesis of the Antarctic Slope Current in West Antarctica |
author_facet |
Thompson, Andrew F. Speer, Kevin G. Schulze Chretien, Lena M. |
author_sort |
Thompson, Andrew F. |
title |
Genesis of the Antarctic Slope Current in West Antarctica |
title_short |
Genesis of the Antarctic Slope Current in West Antarctica |
title_full |
Genesis of the Antarctic Slope Current in West Antarctica |
title_fullStr |
Genesis of the Antarctic Slope Current in West Antarctica |
title_full_unstemmed |
Genesis of the Antarctic Slope Current in West Antarctica |
title_sort |
genesis of the antarctic slope current in west antarctica |
publisher |
American Geophysical Union |
publishDate |
2020 |
url |
https://authors.library.caltech.edu/105002/ https://authors.library.caltech.edu/105002/1/2020GL087802.pdf https://authors.library.caltech.edu/105002/3/grl60853-sup-0001-2020gl087802-figure_si-s01.pdf https://resolver.caltech.edu/CaltechAUTHORS:20200818-125233247 |
geographic |
Antarctic Bellingshausen Sea The Antarctic West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Antarctic Bellingshausen Sea The Antarctic West Antarctic Ice Sheet West Antarctica |
genre |
Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Ice Shelves Sea ice West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Ice Shelves Sea ice West Antarctica |
op_relation |
https://authors.library.caltech.edu/105002/1/2020GL087802.pdf https://authors.library.caltech.edu/105002/3/grl60853-sup-0001-2020gl087802-figure_si-s01.pdf Thompson, Andrew F. and Speer, Kevin G. and Schulze Chretien, Lena M. (2020) Genesis of the Antarctic Slope Current in West Antarctica. Geophysical Research Letters, 47 (16). Art. No. e2020GL087802. ISSN 0094-8276. doi:10.1029/2020gl087802. https://resolver.caltech.edu/CaltechAUTHORS:20200818-125233247 <https://resolver.caltech.edu/CaltechAUTHORS:20200818-125233247> |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2020gl087802 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
16 |
_version_ |
1766103297953890304 |