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| Titel |
The influence of the Brazil and Malvinas Currents on the Southwestern Atlantic Shelf circulation |
| VerfasserIn |
R. P. Matano, E. D. Palma, A. R. Piola |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 6, no. 4 ; Nr. 6, no. 4 (2010-11-30), S.983-995 |
| Datensatznummer |
250003684
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| Publikation (Nr.) |
 copernicus.org/os-6-983-2010.pdf |
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| Zusammenfassung |
| The oceanic circulation over the southwestern Atlantic shelf is influenced
by large tidal amplitudes, substantial freshwater discharges, high wind
speeds and – most importantly – by its proximity to two of the largest
western boundary currents of the world ocean: the Brazil and Malvinas
currents. This review article aims to discriminate the dynamical processes
controlling the interaction between this extensive shelf region and the
deep-ocean. The discussion is focused on two broad regions: the South Brazil
Bight to the north, and Patagonia to the south. The exchanges between the
Brazil Current and the South Brazil Bight are characterized by the
intermittent development of eddies and meanders of the Brazil Current at the
shelfbreak. However, it is argued that this is not the only – nor the most
important – influence of the Brazil Current on the shelf. Numerical
simulations show that the thermohaline structure of the South Brazil Bight
can be entirely ascribed to steady state, bottom boundary layer interactions
between the shelf and the Brazil Current. The Malvinas Current does not show
the development of eddies and meanders, but its influence on the Patagonian
shelf is not less important. Models and observations indicate that the
Malvinas Current not only controls the shelfbreak dynamics and cross-shelf
exchanges but also influences the circulation in the shelf's interior. |
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