Climatic changes in the Indian seas

From the beginning of the century the seasonal variation of the sea-surface temperature and the superincumbent air over the Arabian Sea and the Bay of Bengal have been studied from decade to decade. The amplitude of the annual wave is generally higher for air temperature than for sea-surface temperature. Larger amplitudes of the annual waves are associated with the earlier occurrence of the maximum in the wave. A general tendency for an earlier occurrence of the maximum in the annual wave of both air and sea-surface temperatures was observed. The available data on pressure and relative humidity have also been studied. All the data have been utilized in estimating the evaporation over the sea areas under consideration, and an increase of evaporation has been noticed.