Topographic control of Southern Ocean gyres and the Antarctic Circumpolar Current: A barotropic perspective
In the Southern Ocean the Antarctic Circumpolar Current is significantly steered by large topographic features, and sub-polar gyres form in their lee. The geometry of topographic features in the Southern Ocean is highly variable, but the influence of this variation on the large-scale flow is poorly...
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2019
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/73072/ https://ueaeprints.uea.ac.uk/id/eprint/73072/2/Accepted_Manuscript.pdf https://doi.org/10.1175/JPO-D-19-0083.1 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:73072 2023-06-06T11:46:49+02:00 Topographic control of Southern Ocean gyres and the Antarctic Circumpolar Current: A barotropic perspective Patmore, Ryan D. Holland, Paul R. Munday, David R. Naveira Garabato, Alberto C. Stevens, David P. Meredith, Michael P. 2019-12 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/73072/ https://ueaeprints.uea.ac.uk/id/eprint/73072/2/Accepted_Manuscript.pdf https://doi.org/10.1175/JPO-D-19-0083.1 en eng https://ueaeprints.uea.ac.uk/id/eprint/73072/2/Accepted_Manuscript.pdf Patmore, Ryan D., Holland, Paul R., Munday, David R., Naveira Garabato, Alberto C., Stevens, David P. and Meredith, Michael P. (2019) Topographic control of Southern Ocean gyres and the Antarctic Circumpolar Current: A barotropic perspective. Journal of Physical Oceanography, 49 (12). 3221–3244. ISSN 0022-3670 doi:10.1175/JPO-D-19-0083.1 Article PeerReviewed 2019 ftuniveastangl https://doi.org/10.1175/JPO-D-19-0083.1 2023-04-13T22:32:09Z In the Southern Ocean the Antarctic Circumpolar Current is significantly steered by large topographic features, and sub-polar gyres form in their lee. The geometry of topographic features in the Southern Ocean is highly variable, but the influence of this variation on the large-scale flow is poorly understood. Using idealised barotropic simulations of a zonal channel with a meridional ridge, it is found that the ridge geometry is important for determining the net zonal volume transport. A relationship is observed between ridge width and volume transport that is determined by the form stress generated by the ridge. Gyre formation is also highly reliant on the ridge geometry. A steep ridge allows gyres to form within regions of unblocked geostophic ( f /H) contours, with an increase in gyre strength as the ridge width is reduced. These relationships between ridge width, gyre strength, and net zonal volume transport emerge in order to simultaneously satisfy the conservation of momentum and vorticity. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of East Anglia: UEA Digital Repository Antarctic Southern Ocean The Antarctic Journal of Physical Oceanography 49 12 3221 3244 |
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Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
English |
description |
In the Southern Ocean the Antarctic Circumpolar Current is significantly steered by large topographic features, and sub-polar gyres form in their lee. The geometry of topographic features in the Southern Ocean is highly variable, but the influence of this variation on the large-scale flow is poorly understood. Using idealised barotropic simulations of a zonal channel with a meridional ridge, it is found that the ridge geometry is important for determining the net zonal volume transport. A relationship is observed between ridge width and volume transport that is determined by the form stress generated by the ridge. Gyre formation is also highly reliant on the ridge geometry. A steep ridge allows gyres to form within regions of unblocked geostophic ( f /H) contours, with an increase in gyre strength as the ridge width is reduced. These relationships between ridge width, gyre strength, and net zonal volume transport emerge in order to simultaneously satisfy the conservation of momentum and vorticity. |
format |
Article in Journal/Newspaper |
author |
Patmore, Ryan D. Holland, Paul R. Munday, David R. Naveira Garabato, Alberto C. Stevens, David P. Meredith, Michael P. |
spellingShingle |
Patmore, Ryan D. Holland, Paul R. Munday, David R. Naveira Garabato, Alberto C. Stevens, David P. Meredith, Michael P. Topographic control of Southern Ocean gyres and the Antarctic Circumpolar Current: A barotropic perspective |
author_facet |
Patmore, Ryan D. Holland, Paul R. Munday, David R. Naveira Garabato, Alberto C. Stevens, David P. Meredith, Michael P. |
author_sort |
Patmore, Ryan D. |
title |
Topographic control of Southern Ocean gyres and the Antarctic Circumpolar Current: A barotropic perspective |
title_short |
Topographic control of Southern Ocean gyres and the Antarctic Circumpolar Current: A barotropic perspective |
title_full |
Topographic control of Southern Ocean gyres and the Antarctic Circumpolar Current: A barotropic perspective |
title_fullStr |
Topographic control of Southern Ocean gyres and the Antarctic Circumpolar Current: A barotropic perspective |
title_full_unstemmed |
Topographic control of Southern Ocean gyres and the Antarctic Circumpolar Current: A barotropic perspective |
title_sort |
topographic control of southern ocean gyres and the antarctic circumpolar current: a barotropic perspective |
publishDate |
2019 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/73072/ https://ueaeprints.uea.ac.uk/id/eprint/73072/2/Accepted_Manuscript.pdf https://doi.org/10.1175/JPO-D-19-0083.1 |
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_relation |
https://ueaeprints.uea.ac.uk/id/eprint/73072/2/Accepted_Manuscript.pdf Patmore, Ryan D., Holland, Paul R., Munday, David R., Naveira Garabato, Alberto C., Stevens, David P. and Meredith, Michael P. (2019) Topographic control of Southern Ocean gyres and the Antarctic Circumpolar Current: A barotropic perspective. Journal of Physical Oceanography, 49 (12). 3221–3244. ISSN 0022-3670 doi:10.1175/JPO-D-19-0083.1 |
op_doi |
https://doi.org/10.1175/JPO-D-19-0083.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
49 |
container_issue |
12 |
container_start_page |
3221 |
op_container_end_page |
3244 |
_version_ |
1767952261876547584 |