A linear model of the Antarctic circumpolar current
A simple frictional wind-driven model of the Antarctic circumpolar current is examined. The geometry includes what are thought to be the main features effecting the current, namely a gap corresponding to Drake Passage and a partial barrier corresponding to the South American peninsula. Solutions obt...
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Cambridge University Press (CUP)
1968
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Online Access: | http://dx.doi.org/10.1017/s0022112068000868 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022112068000868 |
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crcambridgeupr:10.1017/s0022112068000868 2024-05-19T07:31:25+00:00 A linear model of the Antarctic circumpolar current Gill, A. E. 1968 http://dx.doi.org/10.1017/s0022112068000868 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022112068000868 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of Fluid Mechanics volume 32, issue 3, page 465-488 ISSN 0022-1120 1469-7645 journal-article 1968 crcambridgeupr https://doi.org/10.1017/s0022112068000868 2024-05-02T06:51:00Z A simple frictional wind-driven model of the Antarctic circumpolar current is examined. The geometry includes what are thought to be the main features effecting the current, namely a gap corresponding to Drake Passage and a partial barrier corresponding to the South American peninsula. Solutions obtained by both numerical and analytical methods are presented. The analytic solution, valid for small values of a friction parameter, enables the total rate of transport of water by the current to be calculated as a function of the friction parameter and the wind stress distribution. The width which controls the rate of transport by the current tends to be the narrowest encountered rather than the average width as assumed in earlier zonal models. However, the current spreads out to several times this width due to frictional effects. The values of the eddy viscosity required to give a rate of transport of the observed order are about 10 3 cm 2 /s for a bottom-friction model and of the order of 10 8 cm 2 /s for a lateral friction model. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Cambridge University Press Journal of Fluid Mechanics 32 3 465 488 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
A simple frictional wind-driven model of the Antarctic circumpolar current is examined. The geometry includes what are thought to be the main features effecting the current, namely a gap corresponding to Drake Passage and a partial barrier corresponding to the South American peninsula. Solutions obtained by both numerical and analytical methods are presented. The analytic solution, valid for small values of a friction parameter, enables the total rate of transport of water by the current to be calculated as a function of the friction parameter and the wind stress distribution. The width which controls the rate of transport by the current tends to be the narrowest encountered rather than the average width as assumed in earlier zonal models. However, the current spreads out to several times this width due to frictional effects. The values of the eddy viscosity required to give a rate of transport of the observed order are about 10 3 cm 2 /s for a bottom-friction model and of the order of 10 8 cm 2 /s for a lateral friction model. |
format |
Article in Journal/Newspaper |
author |
Gill, A. E. |
spellingShingle |
Gill, A. E. A linear model of the Antarctic circumpolar current |
author_facet |
Gill, A. E. |
author_sort |
Gill, A. E. |
title |
A linear model of the Antarctic circumpolar current |
title_short |
A linear model of the Antarctic circumpolar current |
title_full |
A linear model of the Antarctic circumpolar current |
title_fullStr |
A linear model of the Antarctic circumpolar current |
title_full_unstemmed |
A linear model of the Antarctic circumpolar current |
title_sort |
linear model of the antarctic circumpolar current |
publisher |
Cambridge University Press (CUP) |
publishDate |
1968 |
url |
http://dx.doi.org/10.1017/s0022112068000868 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022112068000868 |
genre |
Antarc* Antarctic Drake Passage |
genre_facet |
Antarc* Antarctic Drake Passage |
op_source |
Journal of Fluid Mechanics volume 32, issue 3, page 465-488 ISSN 0022-1120 1469-7645 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0022112068000868 |
container_title |
Journal of Fluid Mechanics |
container_volume |
32 |
container_issue |
3 |
container_start_page |
465 |
op_container_end_page |
488 |
_version_ |
1799469280201277440 |