Inertial-Dissipation flux measurements over south Bay of Bengal during BOBMEX-Pilot experiment |
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Authors: | M Venkataramana K Sengupta G S Bhat S Ameenulla J V S Raju |
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Institution: | (1) Space Physics Laboratory, Vikram Sarabhai Space Centre, 695022 Trivandrum, India;(2) Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, 560012 Bangalore, India |
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Abstract: | This paper describes measurement of air-sea parameters and estimation of sensible and latent heat fluxes by the “Inertial-Dissipation”
technique over south Bay of Bengal. The data were collected on ORV Sagar Kanya during BOBMEX-Pilot cruise during the period
23rd October 1998 to 12th November 1998 over south Bay of Bengal. The fluxes are estimated using the data collected through
fast response sensors namely Gill anemometer, Sonic anemometer and IR Hygrometer. In this paper the analyses carried out for
two days, one relatively cloud free day on November 3rd and the other cloudy with rain on November 1st, are presented. Sea
surface and air temperatures are higher on November 3rd than on November 1st. Sensible heat flux for both the days does not
show any significant variation over the period of estimation, whereas latent heat flux is more for November 3rd than November
1st. An attempt is made to explain the variation of latent heat flux with a parameter called thermal stability on the vapor
transfer from the water surface, which depends on wind speed and air to sea surface temperature difference. |
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Keywords: | Planetary boundary layer air-sea flux turbulence |
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