Impact of sea breeze on wind-seas off Goa, West coast of India

Neetu, S. ; Shetye, Satish ; Chandramohan, P. (2006) Impact of sea breeze on wind-seas off Goa, West coast of India Journal of Earth System Science, 115 (2). pp. 229-234. ISSN 0253-4126

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After withdrawal of the Indian Summer Monsoon and until onset of the next monsoon, i.e., roughly during November-May, winds in the coastal regions of India are dominated by sea breeze. It has an impact on the daily cycle of the sea state near the coast. The impact is quite significant when large scale winds are weak. During one such event, 1-15 April 1997, a Datawell directional waverider buoy was deployed in 23 m water depth off Goa, west coast of India. Twenty-minute averaged spectra, collected once every three hours, show that the spectrum of sea-breeze-related 'wind-seas' peaked at 0.23 ±0.05 Hz. These wind-seas were well separated from swells of frequencies less than 0.15 Hz. The TMA spectrum (Bouwset al 1985) matched the observed seas spectra very well when the sea-breeze was active and the fetch corresponding to equilibrium spectrum was found to be 77±43 km during such occasions. We emphasize on the diurnal cycle of sea-breeze-related sea off the coast of Goa and write an equation for the energy of the seas as a function of the local wind.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Wind-wave; Sea Breeze; Coastal Processes; Energy Density Spectra; Arabian Sea
ID Code:61538
Deposited On:15 Sep 2011 13:05
Last Modified:18 May 2016 11:12

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