Strong export of Antarctic Bottom Water east of the Kerguelen plateau
The primary paths for the transport of Antarctic Bottom Water to the global ocean are the deep western boundary currents east of the Antarctic Peninsula and the Kerguelen plateau. Previous ship-based studies found evidence of the Kerguelen deep western boundary current in the distribution of water p...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/44116 2023-05-15T13:55:39+02:00 Strong export of Antarctic Bottom Water east of the Kerguelen plateau Fukamachi, Y. Rintoul, S. R. Church, J. A. Aoki, S. Sokolov, S. Rosenberg, M. A. Wakatsuchi, M. http://hdl.handle.net/2115/44116 https://doi.org/10.1038/NGEO842 eng eng Nature Publishing Group http://hdl.handle.net/2115/44116 Nature Geoscience, 3(5): 327-331 http://dx.doi.org/10.1038/NGEO842 452 article (author version) fthokunivhus https://doi.org/10.1038/NGEO842 2022-11-18T01:01:59Z The primary paths for the transport of Antarctic Bottom Water to the global ocean are the deep western boundary currents east of the Antarctic Peninsula and the Kerguelen plateau. Previous ship-based studies found evidence of the Kerguelen deep western boundary current in the distribution of water properties and velocity, but no long-term measurements exist to define the mean flow. Here we use results from a coherent array of eight current-meter moorings to reveal a narrow and intense equatorward flow extending throughout the water column. Two-year mean velocities exceed 20 cm s^[-1] at depths ∼3500 m, the strongest mean deep western boundary current flow yet observed at similar depths. The mean equatorward transport of water colder than 0℃ is 12.3±1.2 x 10^[6] m3 s^[-1], partially compensated by poleward flow of 6.0 x 10^[6] m3 s^[-1] mostly across the eastern end of the array. Below 0.2℃, the net transport is 8.0 x 10^[6] m3 s^[-1], in comparison to 1.9 x 10^[6] m3 s^[-1] in the boundary current carrying dense water from the Weddell Sea into the Atlantic north of the Falkland Plateau. The results confirm that the Kerguelen deep western boundary current is a significant pathway of the deep overturning circulation. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Weddell Sea Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Antarctic Antarctic Peninsula Falkland Plateau ENVELOPE(-50.000,-50.000,-51.000,-51.000) Kerguelen The Antarctic Weddell Weddell Sea Nature Geoscience 3 5 327 331 |
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Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
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English |
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452 |
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452 Fukamachi, Y. Rintoul, S. R. Church, J. A. Aoki, S. Sokolov, S. Rosenberg, M. A. Wakatsuchi, M. Strong export of Antarctic Bottom Water east of the Kerguelen plateau |
topic_facet |
452 |
description |
The primary paths for the transport of Antarctic Bottom Water to the global ocean are the deep western boundary currents east of the Antarctic Peninsula and the Kerguelen plateau. Previous ship-based studies found evidence of the Kerguelen deep western boundary current in the distribution of water properties and velocity, but no long-term measurements exist to define the mean flow. Here we use results from a coherent array of eight current-meter moorings to reveal a narrow and intense equatorward flow extending throughout the water column. Two-year mean velocities exceed 20 cm s^[-1] at depths ∼3500 m, the strongest mean deep western boundary current flow yet observed at similar depths. The mean equatorward transport of water colder than 0℃ is 12.3±1.2 x 10^[6] m3 s^[-1], partially compensated by poleward flow of 6.0 x 10^[6] m3 s^[-1] mostly across the eastern end of the array. Below 0.2℃, the net transport is 8.0 x 10^[6] m3 s^[-1], in comparison to 1.9 x 10^[6] m3 s^[-1] in the boundary current carrying dense water from the Weddell Sea into the Atlantic north of the Falkland Plateau. The results confirm that the Kerguelen deep western boundary current is a significant pathway of the deep overturning circulation. |
format |
Article in Journal/Newspaper |
author |
Fukamachi, Y. Rintoul, S. R. Church, J. A. Aoki, S. Sokolov, S. Rosenberg, M. A. Wakatsuchi, M. |
author_facet |
Fukamachi, Y. Rintoul, S. R. Church, J. A. Aoki, S. Sokolov, S. Rosenberg, M. A. 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 |
url |
http://hdl.handle.net/2115/44116 https://doi.org/10.1038/NGEO842 |
long_lat |
ENVELOPE(-50.000,-50.000,-51.000,-51.000) |
geographic |
Antarctic Antarctic Peninsula Falkland Plateau Kerguelen The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Falkland Plateau Kerguelen The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Weddell Sea |
op_relation |
http://hdl.handle.net/2115/44116 Nature Geoscience, 3(5): 327-331 http://dx.doi.org/10.1038/NGEO842 |
op_doi |
https://doi.org/10.1038/NGEO842 |
container_title |
Nature Geoscience |
container_volume |
3 |
container_issue |
5 |
container_start_page |
327 |
op_container_end_page |
331 |
_version_ |
1766262440205484032 |