Abstract
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
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References
Bouws E, Gunter H, Rosenthal W and Vincent C L 1985 Similarity of the wind wave spectrum in finite water depth: 1. Spectral form;J. Geophys. Res. 90 975–986.
Denman 1973 A time-dependent model of the upper ocean;J. Phys. Oceanogr. 3 173–184.
Guide to wave analysis and forecasting 1988 WMO-No. 702.
Hasselmann Ket al 1973 Measurement of wind-wave growth and swell decay during the Joint North Sea Wave Project (JONSWAP); Dtsch. Hydrogr. Inst., Hamburg.
Masselink G and Pattiaratchi C B 1998a The effects of sea breeze on beach morphology, surf zone hydrodynamics and sediment resuspension;Marine Geology 146 115–135.
Masselink G and Pattiaratchi C B 1998b Morphodynamic impact of sea breeze activity on a beach with beach cusp morphology;J. Coast. Res. 14/2 393–406.
Pattiaratchi C B, Hegge B, Gould J and Eliot I 1997 Impact of sea-breeze activity on nearshore and foreshore processes in southwestern Australia;Cont. Shelf Res. 17/13 1539–1560.
Shetye S R and Gouveia A D 1998 Coastal circulation in the North Indian Ocean-Coastal Segment (14, S-W). In:The Global Coastal Ocean: Regional Studies and Syntheses (eds) Robinson A R and Brink K H,The Sea 11 523–556.
Simpson J E 1994Sea Breeze and local wind (Cambridge University Press).
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Neetu, S., Shetye, S. & Chandramohan, P. Impact of sea breeze on wind-seas off Goa, west coast of India. J Earth Syst Sci 115, 229–234 (2006). https://doi.org/10.1007/BF02702036
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DOI: https://doi.org/10.1007/BF02702036