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| Titel |
Propagation of Atlantic Ocean swells in the north Indian Ocean: a case study |
| VerfasserIn |
S. V. Samiksha, P. Vethamony, V. M. Aboobacker, R. Rashmi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 12 ; Nr. 12, no. 12 (2012-12-07), S.3605-3615 |
| Datensatznummer |
250011253
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| Publikation (Nr.) |
 copernicus.org/nhess-12-3605-2012.pdf |
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| Zusammenfassung |
| An analysis of altimeter significant wave height data of May 2007 revealed
the occurrence of an extreme weather event off southern tip of South Africa
in the Atlantic Ocean, and generation of a series of very high swells at
40° S. These swells propagated towards northeast and broke over La
Réunion island in the Indian Ocean on 12 May 2007. The wave model
WAVEWATCH III was used to study the propagation of these swells in the
Indian Ocean. The model was validated for the Indian Ocean using moored buoy
data at 12 locations and merged altimeter wave data. The wave model
accurately reproduced the event of May 2007. Swell heights, of the order of
15.0 m, at the generation area reduced to 6.0 m near La Réunion island.
This study shows that the swells generated in the Roaring Forties of the
Atlantic Ocean (between 15° to 80° E longitude)
propagate in the NE/NNE direction towards the north Indian Ocean, and wave
characteristics of the Arabian Sea are least influenced compared to that of
Bay of Bengal, when swells from the Atlantic Ocean enter the Indian Ocean.
The double peak spectrum extracted for the Bay of Bengal indicates that one
of the peaks is due to swells generated off southern tip of South Africa. |
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