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| Titel |
Impact of the Indonesian Throughflow on Agulhas leakage |
| VerfasserIn |
D. Bars, H. A. Dijkstra, W. P. M. Ruijter |
| 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 ; 9, no. 5 ; Nr. 9, no. 5 (2013-09-05), S.773-785 |
| Datensatznummer |
250085239
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| Publikation (Nr.) |
 copernicus.org/os-9-773-2013.pdf |
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| Zusammenfassung |
| Using ocean models of different complexity we show that opening the
Indonesian Passage between the Pacific and the Indian oceans increases the
input of Indian Ocean water into the South Atlantic via the Agulhas leakage.
In a strongly eddying global ocean model this response results from an
increased Agulhas Current transport and a constant proportion of Agulhas
retroflection south of Africa. The leakage increases through an increased
frequency of ring shedding events. In an idealized two-layer and flat-bottom
eddy resolving model, the proportion of the Agulhas Current transport that
retroflects is (for a wide range of wind stress forcing) not affected by an
opening of the Indonesian Passage. Using a comparison with a linear model and
previous work on the retroflection problem, the result is explained as a
balance between two mechanisms: decrease retroflection due to large-scale
momentum balance and increase due to local barotropic/baroclinic
instabilities. |
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