Observations of the Antarctic Slope undercurrent in the Southeastern Weddell Sea
The Antarctic Slope Front presents a dynamical barrier between the cold Antarctic shelf waters in contact with ice shelves and the warmer subsurface waters offshore. Two hydrographic sections with full-depth current measurements were undertaken in January and February 2009 across the slope and shelf...
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:20258 2023-05-15T13:52:43+02:00 Observations of the Antarctic Slope undercurrent in the Southeastern Weddell Sea Chavanne, Cédric P. Heywood, Karen J. Nicholls, Keith W. Fer, Ilker 2010 https://ueaeprints.uea.ac.uk/id/eprint/20258/ https://doi.org/10.1029/2010GL043603 unknown Chavanne, Cédric P., Heywood, Karen J., Nicholls, Keith W. and Fer, Ilker (2010) Observations of the Antarctic Slope undercurrent in the Southeastern Weddell Sea. Geophysical Research Letters, 37 (13). ISSN 1944-8007 doi:10.1029/2010GL043603 Article PeerReviewed 2010 ftuniveastangl https://doi.org/10.1029/2010GL043603 2023-03-23T23:31:25Z The Antarctic Slope Front presents a dynamical barrier between the cold Antarctic shelf waters in contact with ice shelves and the warmer subsurface waters offshore. Two hydrographic sections with full-depth current measurements were undertaken in January and February 2009 across the slope and shelf in the southeastern Weddell Sea. Southwestward surface-intensified currents of ~30 cm s-1, and northeastward undercurrents of 6-9 cm s-1, were in thermal-wind balance with the sloping isopycnals across the front, which migrated offshore by 30 km in the time interval between the two sections. A mid-depth undercurrent on February 23 was associated with a 130-m uplift of the main pycnocline, bringing Warm Deep Water closer to the shelf break. This vertical displacement, comparable to that caused by seasonal variations in wind speed, implies that undercurrents may affect the exchanges between coastal and deep waters near the Antarctic continental margins. Article in Journal/Newspaper Antarc* Antarctic Ice Shelves Weddell Sea University of East Anglia: UEA Digital Repository Antarctic The Antarctic Weddell Weddell Sea Geophysical Research Letters 37 13 n/a n/a |
institution |
Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
unknown |
description |
The Antarctic Slope Front presents a dynamical barrier between the cold Antarctic shelf waters in contact with ice shelves and the warmer subsurface waters offshore. Two hydrographic sections with full-depth current measurements were undertaken in January and February 2009 across the slope and shelf in the southeastern Weddell Sea. Southwestward surface-intensified currents of ~30 cm s-1, and northeastward undercurrents of 6-9 cm s-1, were in thermal-wind balance with the sloping isopycnals across the front, which migrated offshore by 30 km in the time interval between the two sections. A mid-depth undercurrent on February 23 was associated with a 130-m uplift of the main pycnocline, bringing Warm Deep Water closer to the shelf break. This vertical displacement, comparable to that caused by seasonal variations in wind speed, implies that undercurrents may affect the exchanges between coastal and deep waters near the Antarctic continental margins. |
format |
Article in Journal/Newspaper |
author |
Chavanne, Cédric P. Heywood, Karen J. Nicholls, Keith W. Fer, Ilker |
spellingShingle |
Chavanne, Cédric P. Heywood, Karen J. Nicholls, Keith W. Fer, Ilker Observations of the Antarctic Slope undercurrent in the Southeastern Weddell Sea |
author_facet |
Chavanne, Cédric P. Heywood, Karen J. Nicholls, Keith W. Fer, Ilker |
author_sort |
Chavanne, Cédric P. |
title |
Observations of the Antarctic Slope undercurrent in the Southeastern Weddell Sea |
title_short |
Observations of the Antarctic Slope undercurrent in the Southeastern Weddell Sea |
title_full |
Observations of the Antarctic Slope undercurrent in the Southeastern Weddell Sea |
title_fullStr |
Observations of the Antarctic Slope undercurrent in the Southeastern Weddell Sea |
title_full_unstemmed |
Observations of the Antarctic Slope undercurrent in the Southeastern Weddell Sea |
title_sort |
observations of the antarctic slope undercurrent in the southeastern weddell sea |
publishDate |
2010 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/20258/ https://doi.org/10.1029/2010GL043603 |
geographic |
Antarctic The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Ice Shelves Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Shelves Weddell Sea |
op_relation |
Chavanne, Cédric P., Heywood, Karen J., Nicholls, Keith W. and Fer, Ilker (2010) Observations of the Antarctic Slope undercurrent in the Southeastern Weddell Sea. Geophysical Research Letters, 37 (13). ISSN 1944-8007 doi:10.1029/2010GL043603 |
op_doi |
https://doi.org/10.1029/2010GL043603 |
container_title |
Geophysical Research Letters |
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37 |
container_issue |
13 |
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n/a |
op_container_end_page |
n/a |
_version_ |
1766257188247961600 |