Spatio-temporal Variability of Surface-layer Turbulent Fluxes Over the Bay of Bengal and Arabian sea During the ICARB Field Experiment |
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| Authors: | Denny P Alappattu D Bala Subrahamanyam P K Kunhikrishnan Radhika Ramachandran K M Somayaji R Venkatesh G S Bhat A Bhagavath Singh |
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| Institution: | (1) Space Physics Laboratory, Vikram Sarabhai Space Centre, Thiruvananthapuram, 695 022, Kerala, India;(2) Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, Tamil Nadu, India;(3) Centre for Atmospheric and Oceanic Science, Indian Institute of Science, Bangalore, India |
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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
DN
) with wind speed is also discussed.
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| 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 |
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