Further analysis on the thermal response of the upper Bay of Bengal to the forcing of pre-monsoon cyclonic storm and summer monsoonal onset during MONEX-79

Abstract

The thermal response of The upper oceanic waters at the stationary position l' 5° N & 87, 5° E off  Sri Lanka in the Bay of Bengal  to the forcings of a severe pre-monsoon cyclonic storm and of monsoonal onset is documented with the aid of the data sets collected during MONEX-79. It is found that the cyclonic storm had a stronger Influence compared to that of weak monsoonal onset. Below mixed layer, the importance of vertical advective processes in redistributing the heat is highlighted. The presence of a thermal inversion in the surface layers on the storm day is attributed to the descent of warmer surface waters In response to the Ekman convergence caused by the storm winds. Fourier analysis of temperature of energy from semi-diurnal tide to short period internal waves from the storm day (5 May) to a post-storm day (14 May).