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Spatio-temporal Variability of Surface-layer Turbulent Fluxes Over the Bay of Bengal and Arabian sea During the ICARB Field Experiment

Alappattu, Denny P and Subrahamanyam, Bala D and Kunhikrishnan, PK and Ramachandran, Radhika and Somayaji, KM and Venkatesh, R and Bhat, GS and Singh, Bhagavath A (2008) Spatio-temporal Variability of Surface-layer Turbulent Fluxes Over the Bay of Bengal and Arabian sea During the ICARB Field Experiment. In: Boundary-Layer Meteorol, 126 (2). pp. 297-309.

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Abstract

We report the spatio-temporal variability of surface-layer turbulent fluxes of heat, moisture and momentum over the Bay of Bengal (BoB) and the Arabian Sea (AS) during the Integrated Campaign for Aerosols, gases Radiation Budget (ICARB) field experiment. The meteorological component of ICARB conducted during March – May 2006 onboard the oceanic research vessel Sagar Kanya forms the database for the present study. The bulk transfer coefficients and the surface-layer fluxes are estimated using a modified bulk aerodynamic method, and then the spatio-temporal variability of these air-sea interface fluxes is discussed in detail. It is observed that the sensible and latent heat fluxes over the AS are marginally higher than those over the BoB, which we attribute to differences in the prevailing meteorological conditions over the two oceanic regions. The values of the wind stress, sensible and latent heat fluxes are compared with those obtained for the Indian Ocean Experiment (INDOEX) period. The variation of drag coefficient $(C_D )$, exchange coefficients of sensible heat and moisture $(C_H = C_E )$ and neutral drag coefficient $(C_D_N )$ with wind speed is also discussed.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Springer.
Keywords: Air-Sea interface fluxes; Air-Sea interaction; Bulk aerodynamic method; Integrated Campaign for Aerosols gases and Radiation Budget (ICARB); Marine atmospheric boundary layer · Turbulence
Department/Centre: Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited: 04 Mar 2008
Last Modified: 19 Sep 2010 04:43
URI: http://eprints.iisc.ernet.in/id/eprint/13303

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