Strong export of Antarctic Bottom Water east of the Kerguelen plateau
The primary paths for the transport of Antarctic Bottom Water from the Southern Ocean into the global ocean are the deep western boundary currents east of the Antarctic Peninsula and the Kerguelen plateau(1). Previous ship-based observations documented distinct water properties and velocities associ...
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Online Access: | https://doi.org/10.1038/NGEO842 http://ecite.utas.edu.au/71313 |
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ftunivtasecite:oai:ecite.utas.edu.au:71313 2023-05-15T14:02:30+02:00 Strong export of Antarctic Bottom Water east of the Kerguelen plateau Fukamachi, Y Rintoul, SR Church, JA Aoki, S Sokolov, S Rosenberg, MA Wakatsuchi, M 2010 https://doi.org/10.1038/NGEO842 http://ecite.utas.edu.au/71313 en eng Nature Publishing Group http://dx.doi.org/10.1038/NGEO842 Fukamachi, Y and Rintoul, SR and Church, JA and Aoki, S and Sokolov, S and Rosenberg, MA and Wakatsuchi, M, Strong export of Antarctic Bottom Water east of the Kerguelen plateau, Nature Geoscience, 3, (5) pp. 327-331. ISSN 1752-0894 (2010) [Refereed Article] http://ecite.utas.edu.au/71313 Earth Sciences Oceanography Physical Oceanography Refereed Article PeerReviewed 2010 ftunivtasecite https://doi.org/10.1038/NGEO842 2019-12-13T21:38:51Z The primary paths for the transport of Antarctic Bottom Water from the Southern Ocean into the global ocean are the deep western boundary currents east of the Antarctic Peninsula and the Kerguelen plateau(1). Previous ship-based observations documented distinct water properties and velocities associated with a deep western boundary current in the Kerguelen region(2-7), but the mean flow is as yet unconstrained. Here we report measurements from a coherent array of eight current-meter moorings that reveal a narrow and intense equatorward flow extending throughout the water column just east of the Kerguelen plateau. Velocities averaged over two years exceed 20 cm s(-1) at depths of about 3,500 m, the strongest mean deep western boundary current flow yet observed at similar depths. We estimate the mean equatorward transport of water colder than 0 degrees C at 12.3 +/- 1.2 x 10(6) m(3) s(-1), partially compensated by poleward flow. We also estimate the net equatorward flow of water colder than 0.2 degrees C at about 8 x 10(6) m(3) s(-1), substantially higher than the 1.9 x 10(6) m(3) s(-1) reported from the boundary current that carries dense water from the Weddell Sea into the Atlantic Ocean north of the Falkland plateau(8). We conclude that the Kerguelen deep western boundary current is a significant pathway of the global ocean's deep overturning circulation. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Southern Ocean Weddell Sea eCite UTAS (University of Tasmania) Antarctic Antarctic Peninsula Falkland Plateau ENVELOPE(-50.000,-50.000,-51.000,-51.000) Kerguelen Southern Ocean The Antarctic Weddell Weddell Sea Nature Geoscience 3 5 327 331 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Physical Oceanography |
spellingShingle |
Earth Sciences Oceanography Physical Oceanography Fukamachi, Y Rintoul, SR Church, JA Aoki, S Sokolov, S Rosenberg, MA Wakatsuchi, M Strong export of Antarctic Bottom Water east of the Kerguelen plateau |
topic_facet |
Earth Sciences Oceanography Physical Oceanography |
description |
The primary paths for the transport of Antarctic Bottom Water from the Southern Ocean into the global ocean are the deep western boundary currents east of the Antarctic Peninsula and the Kerguelen plateau(1). Previous ship-based observations documented distinct water properties and velocities associated with a deep western boundary current in the Kerguelen region(2-7), but the mean flow is as yet unconstrained. Here we report measurements from a coherent array of eight current-meter moorings that reveal a narrow and intense equatorward flow extending throughout the water column just east of the Kerguelen plateau. Velocities averaged over two years exceed 20 cm s(-1) at depths of about 3,500 m, the strongest mean deep western boundary current flow yet observed at similar depths. We estimate the mean equatorward transport of water colder than 0 degrees C at 12.3 +/- 1.2 x 10(6) m(3) s(-1), partially compensated by poleward flow. We also estimate the net equatorward flow of water colder than 0.2 degrees C at about 8 x 10(6) m(3) s(-1), substantially higher than the 1.9 x 10(6) m(3) s(-1) reported from the boundary current that carries dense water from the Weddell Sea into the Atlantic Ocean north of the Falkland plateau(8). We conclude that the Kerguelen deep western boundary current is a significant pathway of the global ocean's deep overturning circulation. |
format |
Article in Journal/Newspaper |
author |
Fukamachi, Y Rintoul, SR Church, JA Aoki, S Sokolov, S Rosenberg, MA Wakatsuchi, M |
author_facet |
Fukamachi, Y Rintoul, SR Church, JA Aoki, S Sokolov, S Rosenberg, MA Wakatsuchi, M |
author_sort |
Fukamachi, Y |
title |
Strong export of Antarctic Bottom Water east of the Kerguelen plateau |
title_short |
Strong export of Antarctic Bottom Water east of the Kerguelen plateau |
title_full |
Strong export of Antarctic Bottom Water east of the Kerguelen plateau |
title_fullStr |
Strong export of Antarctic Bottom Water east of the Kerguelen plateau |
title_full_unstemmed |
Strong export of Antarctic Bottom Water east of the Kerguelen plateau |
title_sort |
strong export of antarctic bottom water east of the kerguelen plateau |
publisher |
Nature Publishing Group |
publishDate |
2010 |
url |
https://doi.org/10.1038/NGEO842 http://ecite.utas.edu.au/71313 |
long_lat |
ENVELOPE(-50.000,-50.000,-51.000,-51.000) |
geographic |
Antarctic Antarctic Peninsula Falkland Plateau Kerguelen Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Falkland Plateau Kerguelen Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Southern Ocean Weddell Sea |
op_relation |
http://dx.doi.org/10.1038/NGEO842 Fukamachi, Y and Rintoul, SR and Church, JA and Aoki, S and Sokolov, S and Rosenberg, MA and Wakatsuchi, M, Strong export of Antarctic Bottom Water east of the Kerguelen plateau, Nature Geoscience, 3, (5) pp. 327-331. ISSN 1752-0894 (2010) [Refereed Article] http://ecite.utas.edu.au/71313 |
op_doi |
https://doi.org/10.1038/NGEO842 |
container_title |
Nature Geoscience |
container_volume |
3 |
container_issue |
5 |
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327 |
op_container_end_page |
331 |
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1766272768366608384 |