Northern Arabian Sea is one of the most biologically rich region in the North Indian ocean during winter season. In the present study I wish to investigate the the dynamics behind the enrichment of Chlorophyll-a at the above region using multi satellite observations. Ocean Color Monitor (OCM) imageries are used to identify these areas along the west coast of India during February 2000 & 2001 and the mechanisms that can upwell nutrients to sustain the bloom are investigated using sea surface temperature and winds. The variability of Ekman pumping velocity along the northeast Arabian sea is 0.5 - 3.0x10-6 m/s and the Ekman depth is 25 - 55m. Sea surface temperature was 1°C cooler in 2001 winter. This increased cooling resulted in more intense convection and vertical mixing.