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| Titel |
Malvinas-slope water intrusions on the northern Patagonia continental shelf |
| VerfasserIn |
A. R. Piola, N. Martínez Avellaneda, R. A. Guerrero, F. P. Jardón, E. D. Palma, S. I. Romero |
| 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. 1 ; Nr. 6, no. 1 (2010-03-08), S.345-359 |
| Datensatznummer |
250003364
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| Publikation (Nr.) |
 copernicus.org/os-6-345-2010.pdf |
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| Zusammenfassung |
| The Patagonia continental shelf located off southeastern South America is
bounded offshore by the Malvinas Current, which extends northward from
northern Drake Passage (~55° S) to nearly 38° S. The
transition between relatively warm-fresh shelf waters and Subantarctic
Waters from the western boundary current is characterized by a thermohaline
front extending nearly 2500 km. We use satellite derived sea surface
temperature, and chlorophyll-a data combined with hydrographic and surface
drifter data to document the intrusions of slope waters onto the continental
shelf near 41° S. These intrusions create vertically coherent localized
negative temperature and positive salinity anomalies extending onshore about
150 km from the shelf break. The region is associated with a center of
action of the first mode of non-seasonal sea surface temperature variability
and also relatively high chlorophyll-a variability, suggesting that the
intrusions are important in promoting the local development of
phytoplankton. The generation of slope water penetrations at this location
may be triggered by the inshore excursion of the 100 m isobath, which
appears to steer the Malvinas Current waters over the outer shelf. |
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