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Diurnal variability of heat fluxes over the coastal waters off Visakhapatnam during post-monsoon and winter seasons

DRS at CSIR-National Institute of Oceanography

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Title Diurnal variability of heat fluxes over the coastal waters off Visakhapatnam during post-monsoon and winter seasons
 
Creator Ramu, Ch V.
Bharathi, G.
Sadhuram, Y.
Prasad, K.V.S.R.
 
Subject Heat flux
Diurnal variability
coastal waters
Air-sea fluxes
 
Description Diurnal variability of heat fluxes in the coastal waters of Visakhapatnam has been studied during post-monsoon (Oct, 2006) and winter (Jan-Feb, 2007) seasons utilizing the surface meteorological data and radiation measurements on-board CRV Sagar Sukti and mechanized boats. Estimated values of short and long wave radiation are well comparable with the measured values. Latent (Q sub(LH)) and sensible (Q sub(SH)) heat fluxes are computed from bulk aerodynamic method. Total enthalpy (i.e. Q sub(LH)+Q sub(SH)) was 50-200W/m sup(2) and 10-200W/m sup(2) (on diurnal scale), during post monsoon and winter seasons respectively. The net heat exchange (QN) was 137W/m2 and 92W/m2 under the above seasons. Daily mean values of Bowen Ratio (B) in the study region varied between 0.02 and 0.14,. A simple relationship [(B=0.057(Ts-Ta) sup(0.89); N = 20; r = 0.82; significant at > 99% level)] between Bowen’s ratio (B) and sea-air temperature difference has been proposed for unstable conditions. High correlation (r = 0.87) is found between the values of Q sub(LH) estimated and obtained from the above relationship
 
Date 2010-05-07T07:14:59Z
2010-05-07T07:14:59Z
2010
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, vol.39(1); 128-135
http://drs.nio.org/drs/handle/2264/3597
 
Language en
 
Publisher NISCAIR, CSIR