Record Details

Freak waves off Ratnagiri, west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Freak waves off Ratnagiri, west coast of India
 
Creator Johnson, G.
SanilKumar, V.
Nair, T.M.B.
Singh, J.
Nherakkol, A.
 
Subject Oceanography and Limnology
Wind stress
Wind-wave interaction
ISW, India, Maharastra, Ratnagiri
 
Description Freak waves are relatively large and spontaneous ocean surface gravity waves whose heights are larger than the expected maximum wave height for a given sea state Wave data collected off Ratnagiri, along the west coast of India during 1 January to 31 December 2011 using directional wave rider buoy at 13 m water depth is used to study the freak waves Abnormality Index (AI), the ratio between maximum wave height and significant wave height, is used to identify and study the variation of the freak wave ev ents off Ratnagiri From the half hourly wave data covering one year period, 89 freak wave events are observed The statistics built on these selected events suggests that maximum freak events (29 events) are during the rough SW monsoon and 20 events during the calm pre-monsoon season Highest freak wave (wave height=6.9 m) is observed in July 2011 The Abnormality Index varied from 2 to 2.5 during the study period Daily variations in number of freak wave events are associated with the interaction between sea-breeze generated random wind sea and swells propagating towards the study area.
 
Date 2016-06-21T10:59:23Z
2017-09-30T03:12:34Z
2016-06-21T10:59:23Z
2017-09-30T03:12:34Z
2014
 
Type Journal Article
 
Identifier Indian Journal of Geo-Marine Sciences, vol.43(7); 2014; 1339-1342
0379-5136
http://drs.nio.org/drs/handle/2264/7620
 
Language en
 
Relation Indian J Geo-Mar Sci
SCI
 
Publisher CSIR-NISCAIR