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Freak waves off Ratnagiri, west coast of India

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Title Freak waves off Ratnagiri, west coast of India
 
Creator Glejin, Johnson
Kumar, V. Sanil
Nair, T. M. Balakrishnan
Singh, Jai
Nherakkol, Arun
 
Subject Abnormality Index
Arabian Sea
Extreme wave
Rouge waves
 
Description 1339-1342
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 events 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 2016-06-27T04:34:55Z
2016-06-27T04:34:55Z
2014-07
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/34450
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.43(7) [July 2014]