Sea level changes forced by Southern Ocean winds
On regional scales, changes in sea level are significantly affected by local dynamical changes. Westerly winds over the Southern Ocean have been strengthening and shifting southward in recent decades, and this change is projected to continue in the future. This study applies wind forcing anomalies t...
Published in: | Geophysical Research Letters |
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ftunswworks:oai:unsworks.library.unsw.edu.au:1959.4/53670 2023-05-15T13:55:10+02:00 Sea level changes forced by Southern Ocean winds Frankcombe, Leela Spence, Paul Hogg, A England, Matthew Griffies, S 2013 application/pdf http://hdl.handle.net/1959.4/53670 https://unsworks.unsw.edu.au/bitstreams/8a08f7d3-edd2-4430-a613-5c1d4148b78d/download https://doi.org/10.1002/2013GL058104 EN eng http://hdl.handle.net/1959.4/53670 https://unsworks.unsw.edu.au/bitstreams/8a08f7d3-edd2-4430-a613-5c1d4148b78d/download http://dx.doi.org/10.1002/2013GL058104 open access https://purl.org/coar/access_right/c_abf2 CC BY-NC-ND 3.0 https://creativecommons.org/licenses/by-nc-nd/3.0/au/ free_to_read Copyright (2013) American Geophysical Union. Published version available at: http://dx.doi.org/10.1002/2013GL058104 CC-BY-NC-ND urn:ISSN:0094-8276 Geophysical Research Letters, 40, 21, 5710-5715 journal article http://purl.org/coar/resource_type/c_6501 2013 ftunswworks https://doi.org/10.1002/2013GL058104 2022-08-09T07:44:42Z On regional scales, changes in sea level are significantly affected by local dynamical changes. Westerly winds over the Southern Ocean have been strengthening and shifting southward in recent decades, and this change is projected to continue in the future. This study applies wind forcing anomalies to an eddy-permitting ocean model to study the dynamical response to a Southern Hemisphere westerly wind increase and/or southward shift. It is shown that the applied wind anomalies result in a change in sea surface slope across the Antarctic Circumpolar Current such that a fall in sea level occurs around the Antarctic continental margin. The Antarctic Circumpolar Current transport and regional sea level are particularly sensitive to latitudinal shifts in the wind, with a much more muted response found when only wind strengthening is applied. In addition to the local sea level changes, Southern Ocean winds also have a global effect through changing ocean heat content and the global overturning circulation. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean UNSW Sydney (The University of New South Wales): UNSWorks Antarctic Southern Ocean The Antarctic Geophysical Research Letters 40 21 5710 5715 |
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Open Polar |
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UNSW Sydney (The University of New South Wales): UNSWorks |
op_collection_id |
ftunswworks |
language |
English |
description |
On regional scales, changes in sea level are significantly affected by local dynamical changes. Westerly winds over the Southern Ocean have been strengthening and shifting southward in recent decades, and this change is projected to continue in the future. This study applies wind forcing anomalies to an eddy-permitting ocean model to study the dynamical response to a Southern Hemisphere westerly wind increase and/or southward shift. It is shown that the applied wind anomalies result in a change in sea surface slope across the Antarctic Circumpolar Current such that a fall in sea level occurs around the Antarctic continental margin. The Antarctic Circumpolar Current transport and regional sea level are particularly sensitive to latitudinal shifts in the wind, with a much more muted response found when only wind strengthening is applied. In addition to the local sea level changes, Southern Ocean winds also have a global effect through changing ocean heat content and the global overturning circulation. |
format |
Article in Journal/Newspaper |
author |
Frankcombe, Leela Spence, Paul Hogg, A England, Matthew Griffies, S |
spellingShingle |
Frankcombe, Leela Spence, Paul Hogg, A England, Matthew Griffies, S Sea level changes forced by Southern Ocean winds |
author_facet |
Frankcombe, Leela Spence, Paul Hogg, A England, Matthew Griffies, S |
author_sort |
Frankcombe, Leela |
title |
Sea level changes forced by Southern Ocean winds |
title_short |
Sea level changes forced by Southern Ocean winds |
title_full |
Sea level changes forced by Southern Ocean winds |
title_fullStr |
Sea level changes forced by Southern Ocean winds |
title_full_unstemmed |
Sea level changes forced by Southern Ocean winds |
title_sort |
sea level changes forced by southern ocean winds |
publishDate |
2013 |
url |
http://hdl.handle.net/1959.4/53670 https://unsworks.unsw.edu.au/bitstreams/8a08f7d3-edd2-4430-a613-5c1d4148b78d/download https://doi.org/10.1002/2013GL058104 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
urn:ISSN:0094-8276 Geophysical Research Letters, 40, 21, 5710-5715 |
op_relation |
http://hdl.handle.net/1959.4/53670 https://unsworks.unsw.edu.au/bitstreams/8a08f7d3-edd2-4430-a613-5c1d4148b78d/download http://dx.doi.org/10.1002/2013GL058104 |
op_rights |
open access https://purl.org/coar/access_right/c_abf2 CC BY-NC-ND 3.0 https://creativecommons.org/licenses/by-nc-nd/3.0/au/ free_to_read Copyright (2013) American Geophysical Union. Published version available at: http://dx.doi.org/10.1002/2013GL058104 |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1002/2013GL058104 |
container_title |
Geophysical Research Letters |
container_volume |
40 |
container_issue |
21 |
container_start_page |
5710 |
op_container_end_page |
5715 |
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1766261449178480640 |