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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.39 [2010] >
IJMS Vol.39(1) [March 2010] >
| Title: | Diurnal variability of heat fluxes over the coastal waters off Visakhapatnam during post-monsoon and winter seasons |
| Authors: | Ramu, Ch. Venkata
Bharathi, G
Sadhuram, Y
Prasad, K V S R |
| Keywords: | Heat flux
Ocean
Radiation
Enthalpy
Wind |
| Issue Date: | Mar-2010 |
| Publisher: | CSIR |
| Abstract: |
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 (QLH) and sensible
(QSH) heat fluxes are computed from bulk aerodynamic method. Total
enthalpy (i.e. QLH+QSH) was 50-200W/m2 and
10-200W/m2 (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)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 QLH estimated
and obtained from the above relationship.
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| Page(s): | 128-135 |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.39(1) [March 2010]
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