Seasonal changes in sea level at Port Blair

Abstract

Monthly and annual mean sea levels at Port Blair have been studied from the tide data of eight years. Variations of monthly mean sea levels show two maxima and two minima with higher maximum in June and lower maximum in November, and lower minimum during March and the other minimum in October. The mean annual range is about 16 cm. An attempt has been made to explain the seasonal changes of sea levels in relation to the climatic factors which alter the density structure of the surface layers in the oceans and the atmospheric pressure that tilts the sea surface