Deep boundary current disintegration in Drake Passage
The fate of a deep boundary current that originates in the Southeast Pacific and flows southward along the continental slope of South America is elucidated. The current transports poorly ventilated water of low salinity (a type of Pacific Deep Water; PDW), into Drake Passage. East of Drake Passage,...
Published in: | Geophysical Research Letters |
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2014
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Online Access: | https://eprints.soton.ac.uk/354488/ https://eprints.soton.ac.uk/354488/1/grl51239_Brearley.pdf |
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ftsouthampton:oai:eprints.soton.ac.uk:354488 2023-08-27T04:09:10+02:00 Deep boundary current disintegration in Drake Passage Brearley, J. Alexander Sheen, Katy L. Naveira Garabato, Alberto C. Smeed, David A. Speer, Kevin G. Thurnherr, Andeaus M. Meredith, Michael M. Waterman, Stephanie N. 2014-01-16 text https://eprints.soton.ac.uk/354488/ https://eprints.soton.ac.uk/354488/1/grl51239_Brearley.pdf en English eng https://eprints.soton.ac.uk/354488/1/grl51239_Brearley.pdf Brearley, J. Alexander, Sheen, Katy L., Naveira Garabato, Alberto C., Smeed, David A., Speer, Kevin G., Thurnherr, Andeaus M., Meredith, Michael M. and Waterman, Stephanie N. (2014) Deep boundary current disintegration in Drake Passage. Geophysical Research Letters, 41 (1), 121-127. (doi:10.1002/2013GL058617 <http://dx.doi.org/10.1002/2013GL058617>). Article PeerReviewed 2014 ftsouthampton https://doi.org/10.1002/2013GL058617 2023-08-03T22:20:16Z The fate of a deep boundary current that originates in the Southeast Pacific and flows southward along the continental slope of South America is elucidated. The current transports poorly ventilated water of low salinity (a type of Pacific Deep Water; PDW), into Drake Passage. East of Drake Passage, the boundary current breaks into fresh anticyclonic eddies, nine examples of which were observed in mooring data from December 2009 to March 2012. The observed eddies appear to originate mainly from a topographic separation point close to 60°W, have typical diameters of 20–60?km and accompanying Rossby numbers of 0.1–0.3. These features are likely to be responsible for transporting PDW meridionally across the ACC, explaining the near-homogenization of Circumpolar Deep Water properties downstream of Drake Passage. This mechanism of boundary current breakdown may constitute an important process in the Southern Ocean overturning circulation. Article in Journal/Newspaper Drake Passage Southern Ocean University of Southampton: e-Prints Soton Southern Ocean Drake Passage Pacific Separation Point ENVELOPE(-93.468,-93.468,75.135,75.135) Geophysical Research Letters 41 1 121 127 |
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Open Polar |
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University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
The fate of a deep boundary current that originates in the Southeast Pacific and flows southward along the continental slope of South America is elucidated. The current transports poorly ventilated water of low salinity (a type of Pacific Deep Water; PDW), into Drake Passage. East of Drake Passage, the boundary current breaks into fresh anticyclonic eddies, nine examples of which were observed in mooring data from December 2009 to March 2012. The observed eddies appear to originate mainly from a topographic separation point close to 60°W, have typical diameters of 20–60?km and accompanying Rossby numbers of 0.1–0.3. These features are likely to be responsible for transporting PDW meridionally across the ACC, explaining the near-homogenization of Circumpolar Deep Water properties downstream of Drake Passage. This mechanism of boundary current breakdown may constitute an important process in the Southern Ocean overturning circulation. |
format |
Article in Journal/Newspaper |
author |
Brearley, J. Alexander Sheen, Katy L. Naveira Garabato, Alberto C. Smeed, David A. Speer, Kevin G. Thurnherr, Andeaus M. Meredith, Michael M. Waterman, Stephanie N. |
spellingShingle |
Brearley, J. Alexander Sheen, Katy L. Naveira Garabato, Alberto C. Smeed, David A. Speer, Kevin G. Thurnherr, Andeaus M. Meredith, Michael M. Waterman, Stephanie N. Deep boundary current disintegration in Drake Passage |
author_facet |
Brearley, J. Alexander Sheen, Katy L. Naveira Garabato, Alberto C. Smeed, David A. Speer, Kevin G. Thurnherr, Andeaus M. Meredith, Michael M. Waterman, Stephanie N. |
author_sort |
Brearley, J. Alexander |
title |
Deep boundary current disintegration in Drake Passage |
title_short |
Deep boundary current disintegration in Drake Passage |
title_full |
Deep boundary current disintegration in Drake Passage |
title_fullStr |
Deep boundary current disintegration in Drake Passage |
title_full_unstemmed |
Deep boundary current disintegration in Drake Passage |
title_sort |
deep boundary current disintegration in drake passage |
publishDate |
2014 |
url |
https://eprints.soton.ac.uk/354488/ https://eprints.soton.ac.uk/354488/1/grl51239_Brearley.pdf |
long_lat |
ENVELOPE(-93.468,-93.468,75.135,75.135) |
geographic |
Southern Ocean Drake Passage Pacific Separation Point |
geographic_facet |
Southern Ocean Drake Passage Pacific Separation Point |
genre |
Drake Passage Southern Ocean |
genre_facet |
Drake Passage Southern Ocean |
op_relation |
https://eprints.soton.ac.uk/354488/1/grl51239_Brearley.pdf Brearley, J. Alexander, Sheen, Katy L., Naveira Garabato, Alberto C., Smeed, David A., Speer, Kevin G., Thurnherr, Andeaus M., Meredith, Michael M. and Waterman, Stephanie N. (2014) Deep boundary current disintegration in Drake Passage. Geophysical Research Letters, 41 (1), 121-127. (doi:10.1002/2013GL058617 <http://dx.doi.org/10.1002/2013GL058617>). |
op_doi |
https://doi.org/10.1002/2013GL058617 |
container_title |
Geophysical Research Letters |
container_volume |
41 |
container_issue |
1 |
container_start_page |
121 |
op_container_end_page |
127 |
_version_ |
1775350327856332800 |