Upper ocean temperature and the baroclinic transport stream function relationship in Drake Passage
Repeat hydrographic sections across the Antarctic Circumpolar Current (ACC) in Drake Passage are used to derive an empirical relationship between upper ocean temperature and the baroclinic transport stream function. Cross validation shows this relationship can be used to infer baroclinic transport (...
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ftnerc:oai:nora.nerc.ac.uk:115822 2023-05-15T13:48:07+02:00 Upper ocean temperature and the baroclinic transport stream function relationship in Drake Passage Sokolov, S. King, B.A. Rintoul, S.R. Rojas, R.L. 2004 http://nora.nerc.ac.uk/id/eprint/115822/ http://www.agu.org/journals/jc/jc0405/2003JC002010/index.html https://doi.org/10.1029/2003JC002010 unknown Sokolov, S.; King, B.A.; Rintoul, S.R.; Rojas, R.L. 2004 Upper ocean temperature and the baroclinic transport stream function relationship in Drake Passage. Journal of Geophysical Research, 109 (C5). C05001. https://doi.org/10.1029/2003JC002010 <https://doi.org/10.1029/2003JC002010> Publication - Article PeerReviewed 2004 ftnerc https://doi.org/10.1029/2003JC002010 2023-02-04T19:34:21Z Repeat hydrographic sections across the Antarctic Circumpolar Current (ACC) in Drake Passage are used to derive an empirical relationship between upper ocean temperature and the baroclinic transport stream function. Cross validation shows this relationship can be used to infer baroclinic transport (above and relative to 2500 m) from expendable bathythermograph (XBT) temperature measurements with an error of a few per cent. Transport errors of less than 2 Sv are obtained if temperature at depths between 600 and 1600 m is used to define the relationship. Temperature at depths above 300 m provides an unreliable index of transport because of variability in temperature-salinity (T-S) properties produced by air-sea interaction. The scatter in the relationship between temperature and stream function from repeat observations along a single line is similar in magnitude to the scatter observed when data from the broader Drake Passage area are considered. In both cases, variability about the mean temperature-stream function relationship reflects advection of water with anomalous T-S properties. The tight relationship between temperature and stream function in Drake Passage and south of Australia suggests baroclinic transports can be inferred from XBT temperatures with high accuracy in the Southern Ocean, providing a cost-effective means of monitoring ACC variability. However, care must be taken at the end points, particularly in the Drake Passage where the strong flow of the Subantarctic Front sometimes lies over the continental slope. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Drake Passage Southern Ocean The Antarctic Journal of Geophysical Research 109 C5 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
Repeat hydrographic sections across the Antarctic Circumpolar Current (ACC) in Drake Passage are used to derive an empirical relationship between upper ocean temperature and the baroclinic transport stream function. Cross validation shows this relationship can be used to infer baroclinic transport (above and relative to 2500 m) from expendable bathythermograph (XBT) temperature measurements with an error of a few per cent. Transport errors of less than 2 Sv are obtained if temperature at depths between 600 and 1600 m is used to define the relationship. Temperature at depths above 300 m provides an unreliable index of transport because of variability in temperature-salinity (T-S) properties produced by air-sea interaction. The scatter in the relationship between temperature and stream function from repeat observations along a single line is similar in magnitude to the scatter observed when data from the broader Drake Passage area are considered. In both cases, variability about the mean temperature-stream function relationship reflects advection of water with anomalous T-S properties. The tight relationship between temperature and stream function in Drake Passage and south of Australia suggests baroclinic transports can be inferred from XBT temperatures with high accuracy in the Southern Ocean, providing a cost-effective means of monitoring ACC variability. However, care must be taken at the end points, particularly in the Drake Passage where the strong flow of the Subantarctic Front sometimes lies over the continental slope. |
format |
Article in Journal/Newspaper |
author |
Sokolov, S. King, B.A. Rintoul, S.R. Rojas, R.L. |
spellingShingle |
Sokolov, S. King, B.A. Rintoul, S.R. Rojas, R.L. Upper ocean temperature and the baroclinic transport stream function relationship in Drake Passage |
author_facet |
Sokolov, S. King, B.A. Rintoul, S.R. Rojas, R.L. |
author_sort |
Sokolov, S. |
title |
Upper ocean temperature and the baroclinic transport stream function relationship in Drake Passage |
title_short |
Upper ocean temperature and the baroclinic transport stream function relationship in Drake Passage |
title_full |
Upper ocean temperature and the baroclinic transport stream function relationship in Drake Passage |
title_fullStr |
Upper ocean temperature and the baroclinic transport stream function relationship in Drake Passage |
title_full_unstemmed |
Upper ocean temperature and the baroclinic transport stream function relationship in Drake Passage |
title_sort |
upper ocean temperature and the baroclinic transport stream function relationship in drake passage |
publishDate |
2004 |
url |
http://nora.nerc.ac.uk/id/eprint/115822/ http://www.agu.org/journals/jc/jc0405/2003JC002010/index.html https://doi.org/10.1029/2003JC002010 |
geographic |
Antarctic Drake Passage Southern Ocean The Antarctic |
geographic_facet |
Antarctic Drake Passage Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Drake Passage Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Southern Ocean |
op_relation |
Sokolov, S.; King, B.A.; Rintoul, S.R.; Rojas, R.L. 2004 Upper ocean temperature and the baroclinic transport stream function relationship in Drake Passage. Journal of Geophysical Research, 109 (C5). C05001. https://doi.org/10.1029/2003JC002010 <https://doi.org/10.1029/2003JC002010> |
op_doi |
https://doi.org/10.1029/2003JC002010 |
container_title |
Journal of Geophysical Research |
container_volume |
109 |
container_issue |
C5 |
_version_ |
1766248606487019520 |