Direct observations of the antarctic circumpolar current transport on the northern flank of the Kerguelen Plateau
The standing meander in the Antarctic Circumpolar Current (ACC) found on the northern flank of the Kerguelen Plateau was investigated during the Southern Ocean Finestructure cruise in November–December 2008. An 18 year time series of surface geostrophic currents from satellite altimetry shows that t...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/43150/ https://doi.org/10.1002/jgrc.20067 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:43150 2023-06-06T11:45:56+02:00 Direct observations of the antarctic circumpolar current transport on the northern flank of the Kerguelen Plateau Damerell, Gillian Heywood, Karen Stevens, David 2013 https://ueaeprints.uea.ac.uk/id/eprint/43150/ https://doi.org/10.1002/jgrc.20067 unknown Damerell, Gillian, Heywood, Karen and Stevens, David (2013) Direct observations of the antarctic circumpolar current transport on the northern flank of the Kerguelen Plateau. Journal of Geophysical Research, 118 (3). pp. 1333-1348. ISSN 0148-0227 doi:10.1002/jgrc.20067 Article PeerReviewed 2013 ftuniveastangl https://doi.org/10.1002/jgrc.20067 2023-04-13T22:31:45Z The standing meander in the Antarctic Circumpolar Current (ACC) found on the northern flank of the Kerguelen Plateau was investigated during the Southern Ocean Finestructure cruise in November–December 2008. An 18 year time series of surface geostrophic currents from satellite altimetry shows that the meander as observed during this survey is typical of the region. Hydrographic stations were occupied between 65–75°E and 43–48°S on the shelf (~200m depth) and slope into the deep ocean to the north of Kerguelen (~4700m), providing the most detailed survey of this region to date. Geostrophic shears are referenced to lowered acoustic Doppler current profiler velocities to give the first estimate of the total volume transport in this region, and the transport budget is closed around the survey box. The Subtropical Front, Subantarctic Front, and a northern branch of the Polar Front together have an associated transport of 174±22Sv eastward. While 174Sv is large compared with typical Drake Passage transports, it is reconciled with other estimates of the total transport with the additional 15Sv of the Indonesian Throughflow. Baroclinic transport referenced to the deepest common level between station pairs is 119Sv, consistent with other estimates of the baroclinic transport in this area. At this longitude, the fronts of the ACC are exceptionally close together. We discuss the exchange of properties across the fronts. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Southern Ocean University of East Anglia: UEA Digital Repository Antarctic Drake Passage Kerguelen Southern Ocean The Antarctic Journal of Geophysical Research: Oceans 118 3 1333 1348 |
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Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
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ftuniveastangl |
language |
unknown |
description |
The standing meander in the Antarctic Circumpolar Current (ACC) found on the northern flank of the Kerguelen Plateau was investigated during the Southern Ocean Finestructure cruise in November–December 2008. An 18 year time series of surface geostrophic currents from satellite altimetry shows that the meander as observed during this survey is typical of the region. Hydrographic stations were occupied between 65–75°E and 43–48°S on the shelf (~200m depth) and slope into the deep ocean to the north of Kerguelen (~4700m), providing the most detailed survey of this region to date. Geostrophic shears are referenced to lowered acoustic Doppler current profiler velocities to give the first estimate of the total volume transport in this region, and the transport budget is closed around the survey box. The Subtropical Front, Subantarctic Front, and a northern branch of the Polar Front together have an associated transport of 174±22Sv eastward. While 174Sv is large compared with typical Drake Passage transports, it is reconciled with other estimates of the total transport with the additional 15Sv of the Indonesian Throughflow. Baroclinic transport referenced to the deepest common level between station pairs is 119Sv, consistent with other estimates of the baroclinic transport in this area. At this longitude, the fronts of the ACC are exceptionally close together. We discuss the exchange of properties across the fronts. |
format |
Article in Journal/Newspaper |
author |
Damerell, Gillian Heywood, Karen Stevens, David |
spellingShingle |
Damerell, Gillian Heywood, Karen Stevens, David Direct observations of the antarctic circumpolar current transport on the northern flank of the Kerguelen Plateau |
author_facet |
Damerell, Gillian Heywood, Karen Stevens, David |
author_sort |
Damerell, Gillian |
title |
Direct observations of the antarctic circumpolar current transport on the northern flank of the Kerguelen Plateau |
title_short |
Direct observations of the antarctic circumpolar current transport on the northern flank of the Kerguelen Plateau |
title_full |
Direct observations of the antarctic circumpolar current transport on the northern flank of the Kerguelen Plateau |
title_fullStr |
Direct observations of the antarctic circumpolar current transport on the northern flank of the Kerguelen Plateau |
title_full_unstemmed |
Direct observations of the antarctic circumpolar current transport on the northern flank of the Kerguelen Plateau |
title_sort |
direct observations of the antarctic circumpolar current transport on the northern flank of the kerguelen plateau |
publishDate |
2013 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/43150/ https://doi.org/10.1002/jgrc.20067 |
geographic |
Antarctic Drake Passage Kerguelen Southern Ocean The Antarctic |
geographic_facet |
Antarctic Drake Passage Kerguelen Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Drake Passage Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Southern Ocean |
op_relation |
Damerell, Gillian, Heywood, Karen and Stevens, David (2013) Direct observations of the antarctic circumpolar current transport on the northern flank of the Kerguelen Plateau. Journal of Geophysical Research, 118 (3). pp. 1333-1348. ISSN 0148-0227 doi:10.1002/jgrc.20067 |
op_doi |
https://doi.org/10.1002/jgrc.20067 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
118 |
container_issue |
3 |
container_start_page |
1333 |
op_container_end_page |
1348 |
_version_ |
1767951132529786880 |