Break-up of the Atlantic Deep Western Boundary Current into eddies at 8°S
The existence in the ocean of deep western boundary currents, which connect the high-latitude regions where deep water is formed with upwelling regions as part of the global ocean circulation, was postulated more than 40 years ago1. These ocean currents have been found adjacent to the continental sl...
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Online Access: | https://oceanrep.geomar.de/id/eprint/7764/ https://oceanrep.geomar.de/id/eprint/7764/1/nature03134.pdf https://doi.org/10.1038/nature03134 |
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ftoceanrep:oai:oceanrep.geomar.de:7764 2023-05-15T13:53:57+02:00 Break-up of the Atlantic Deep Western Boundary Current into eddies at 8°S Dengler, Marcus Schott, Friedrich Eden, Carsten Brandt, Peter Fischer, Jürgen Zantopp, Rainer J. 2004 text https://oceanrep.geomar.de/id/eprint/7764/ https://oceanrep.geomar.de/id/eprint/7764/1/nature03134.pdf https://doi.org/10.1038/nature03134 en eng Nature Publishing Group https://oceanrep.geomar.de/id/eprint/7764/1/nature03134.pdf Dengler, M. , Schott, F., Eden, C., Brandt, P. , Fischer, J. and Zantopp, R. J. (2004) Break-up of the Atlantic Deep Western Boundary Current into eddies at 8°S. Nature, 432 . pp. 1018-1020. DOI 10.1038/nature03134 <https://doi.org/10.1038/nature03134>. doi:10.1038/nature03134 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2004 ftoceanrep https://doi.org/10.1038/nature03134 2023-04-07T14:55:23Z The existence in the ocean of deep western boundary currents, which connect the high-latitude regions where deep water is formed with upwelling regions as part of the global ocean circulation, was postulated more than 40 years ago1. These ocean currents have been found adjacent to the continental slopes of all ocean basins, and have core depths between 1,500 and 4,000 m. In the Atlantic Ocean, the deep western boundary current is estimated to carry (10–40) times 106 m3 s-1 of water2, 3, 4, 5, transporting North Atlantic Deep Water—from the overflow regions between Greenland and Scotland and from the Labrador Sea—into the South Atlantic and the Antarctic circumpolar current. Here we present direct velocity and water mass observations obtained in the period 2000 to 2003, as well as results from a numerical ocean circulation model, showing that the Atlantic deep western boundary current breaks up at 8° S. Southward of this latitude, the transport of North Atlantic Deep Water into the South Atlantic Ocean is accomplished by migrating eddies, rather than by a continuous flow. Our model simulation indicates that the deep western boundary current breaks up into eddies at the present intensity of meridional overturning circulation. For weaker overturning, continuation as a stable, laminar boundary flow seems possible. Article in Journal/Newspaper Antarc* Antarctic Greenland Labrador Sea North Atlantic Deep Water North Atlantic South Atlantic Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Greenland The Antarctic Nature 432 7020 1018 1020 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
The existence in the ocean of deep western boundary currents, which connect the high-latitude regions where deep water is formed with upwelling regions as part of the global ocean circulation, was postulated more than 40 years ago1. These ocean currents have been found adjacent to the continental slopes of all ocean basins, and have core depths between 1,500 and 4,000 m. In the Atlantic Ocean, the deep western boundary current is estimated to carry (10–40) times 106 m3 s-1 of water2, 3, 4, 5, transporting North Atlantic Deep Water—from the overflow regions between Greenland and Scotland and from the Labrador Sea—into the South Atlantic and the Antarctic circumpolar current. Here we present direct velocity and water mass observations obtained in the period 2000 to 2003, as well as results from a numerical ocean circulation model, showing that the Atlantic deep western boundary current breaks up at 8° S. Southward of this latitude, the transport of North Atlantic Deep Water into the South Atlantic Ocean is accomplished by migrating eddies, rather than by a continuous flow. Our model simulation indicates that the deep western boundary current breaks up into eddies at the present intensity of meridional overturning circulation. For weaker overturning, continuation as a stable, laminar boundary flow seems possible. |
format |
Article in Journal/Newspaper |
author |
Dengler, Marcus Schott, Friedrich Eden, Carsten Brandt, Peter Fischer, Jürgen Zantopp, Rainer J. |
spellingShingle |
Dengler, Marcus Schott, Friedrich Eden, Carsten Brandt, Peter Fischer, Jürgen Zantopp, Rainer J. Break-up of the Atlantic Deep Western Boundary Current into eddies at 8°S |
author_facet |
Dengler, Marcus Schott, Friedrich Eden, Carsten Brandt, Peter Fischer, Jürgen Zantopp, Rainer J. |
author_sort |
Dengler, Marcus |
title |
Break-up of the Atlantic Deep Western Boundary Current into eddies at 8°S |
title_short |
Break-up of the Atlantic Deep Western Boundary Current into eddies at 8°S |
title_full |
Break-up of the Atlantic Deep Western Boundary Current into eddies at 8°S |
title_fullStr |
Break-up of the Atlantic Deep Western Boundary Current into eddies at 8°S |
title_full_unstemmed |
Break-up of the Atlantic Deep Western Boundary Current into eddies at 8°S |
title_sort |
break-up of the atlantic deep western boundary current into eddies at 8°s |
publisher |
Nature Publishing Group |
publishDate |
2004 |
url |
https://oceanrep.geomar.de/id/eprint/7764/ https://oceanrep.geomar.de/id/eprint/7764/1/nature03134.pdf https://doi.org/10.1038/nature03134 |
geographic |
Antarctic Greenland The Antarctic |
geographic_facet |
Antarctic Greenland The Antarctic |
genre |
Antarc* Antarctic Greenland Labrador Sea North Atlantic Deep Water North Atlantic South Atlantic Ocean |
genre_facet |
Antarc* Antarctic Greenland Labrador Sea North Atlantic Deep Water North Atlantic South Atlantic Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/7764/1/nature03134.pdf Dengler, M. , Schott, F., Eden, C., Brandt, P. , Fischer, J. and Zantopp, R. J. (2004) Break-up of the Atlantic Deep Western Boundary Current into eddies at 8°S. Nature, 432 . pp. 1018-1020. DOI 10.1038/nature03134 <https://doi.org/10.1038/nature03134>. doi:10.1038/nature03134 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1038/nature03134 |
container_title |
Nature |
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432 |
container_issue |
7020 |
container_start_page |
1018 |
op_container_end_page |
1020 |
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1766259420057042944 |