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Observations of long-period waves in the nearshore waters of central west coast of India during the fall inter-monsoon period

DRS at CSIR-National Institute of Oceanography

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Title Observations of long-period waves in the nearshore waters of central west coast of India during the fall inter-monsoon period
 
Creator Amrutha, M.M.
SanilKumar, V.
Jesbin, G.
 
Subject Oceanography and limnology
Oceanography and limnology
Oceanography and limnology
Marine technology
 
Description The waves measured in the eastern Arabian Sea during the fall inter-monsoon period (October) are examined at 4 locations during 2010–2015. Multi-modal features have been observed in measured wave spectra due to independent wave systems corresponding to long-period swells generated by remote storms, swells generated by nearby storms and locally generated wind waves. In October, the long-period waves (peak wave period>18 s) appeared 5–7 times in different years and the significant wave height of these long-period waves are less than 1.4 m. The spatial distribution of peak wave period based on the numerical wave model shows that the presence of long-period swells along the 350 km stretch of the eastern Arabian Sea is almost in the same day. It is observed that the high waves (significant wave height >4 m) generated in an area bounded by 40–60°S and 20–40°E in the south Indian Ocean reached the measurement locations in 5–6 days and resulted in the long-period waves. Relatively high percentage of long-period waves are observed in 2011 and 2015 compared to other years due to the reduction in short-period waves at the study location due to the influence of Indian Ocean Dipole
 
Date 2017-03-01T11:00:12Z
2017-03-01T11:00:12Z
2017
 
Type Journal Article
 
Identifier Ocean Engineering, vol.131(1); 2017; 244-262
http://drs.nio.org/drs/handle/2264/5093
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2017] Elsevier
 
Publisher Elsevier