COASTAL UPWELLING IN THE VICINITY OF TIOMAN ISLAND

Abstract

The coastal upwelling in Tioman Island vicinity was studied using the Conductivity, Temperature, Depth sensor (CTD) and Acoustic Doppler Current Profier (ADCP) data collection and model output during June and August 2014. Different coastal upwelling strength was noted around the island, where the temperature records during the study was on average 0.6 °C cooler at the north (3.1°N latitude) than the south (2.6°N latitude) parts. Slightly high magnitude of increased current speed (~60 cm/s) at the north part of Tioman Island was believed to be the causative factor of the observed temperature difference. Analysis on the vertical section of density and northsouth velocity confimed the separation of current speed in the water column around the island, meanwhile the model simulation of the current circulation during August, 2014 proved the presence of increase current with an average speed of 0.34 m/s around Tioman Island especially at the north of the island.