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| Titel |
Opposing oceanic and atmospheric ENSO influences on the Ross Sea Region, Antarctica |
| VerfasserIn |
N. A. N. Bertler, T. R. Naish, P. A. Mayewski, P. J. Barrett |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: 1st Alexander von Humboldt International Conference ; Nr. 6 (2006-01-09), S.83-86 |
| Datensatznummer |
250003242
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| Publikation (Nr.) |
 copernicus.org/adgeo-6-83-2006.pdf |
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| Zusammenfassung |
| Here we discuss the cause and effect of opposing atmospheric and oceanic
ENSO forcings in the Ross Sea, that lead to a net warming in the eastern
Ross Sea and a net cooling in the western Ross Sea during El Niño years.
During La Niña years the opposite is observed. The oceanic ENSO effect
causes a ~1 K warming with a 3 month lag during El Niño years in
comparison to La Niña time periods. During El Niño events, the
atmospheric ENSO effect leads to a shift and weakening of the Amundsen Sea
Low, causing enhanced import of colder West Antarctic air masses into the
western Ross Sea. We find that this indirect ENSO effect is about one order
of magnitude stronger (up to 15 K) in the western Ross Sea than the direct
effect (~1 K), leading to a net cooling during El Niño and net
warming during La Niña events. |
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