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Propagation of Atlantic Ocean swells in the north Indian Ocean: A case study

DRS at CSIR-National Institute of Oceanography

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Title Propagation of Atlantic Ocean swells in the north Indian Ocean: A case study
 
Creator Samiksha, S.V.
Vethamony, P.
Aboobacker, V.M.
Rashmi, R.
 
Subject swell
wave propagation
 
Description 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 degrees S. These swells propagated towards northeast and broke over La Reunion 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 15.0m, at the generation area reduced to 6.0m near La Reunion Island. This study shows that the swells generated in the Roaring Forties of the Atlantic Ocean (between 15 to 80 degrees 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.
 
Date 2013-01-02T07:07:17Z
2013-01-02T07:07:17Z
2012
 
Type Journal Article
 
Identifier Natural Hazards and Earth System Sciences, vol.12(2); 2012; 3605-3615
no
http://drs.nio.org/drs/handle/2264/4210
 
Language en
 
Relation Nat_Hazards_Earth_Syst_Sci_12_3605.jpg
 
Rights © Author(s) 2012. CC Attribution 3.0 License
 
Publisher European Geosciences Union