Journal of the Marine Biological Association of India

Volume 16 Issue 1

Analysis of sea surface temperature at an equatorial coastal station

V. Narayanan and R. Padmanabha Pillai

An analytical study of the sea surface temperature at Thumba Equatorial Rocket Launching Station (Lat8°32'N, Long.76°52'E) at two different hours—0930 and 1130 hrs 1ST—for a period of three years (1967-1970) is presented. A few interesting features of the daily and monthly variation of sea surface temperature are discussed in reation to the onset and withdrawal of the Indian South-west monsoon. The sea surface temperature off Kerala coast is found to be below 26*C during the' south-west monsoon period (June to September) and its seasonal variation is in the range 22-30°C. The diurnal variation of the coastal sea water is found to be less significant (1-2°C) when compared to that of the canal water temperature (3-4°C) and surface air temperature (6-8°C). The standard deviation of sea, canal and surface air temperature is of the same magnitude 1 .S°C.

Date : 30-04-1974