Browsing by Author "Kok Poh Heng"

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    A Study on the meteorological influences towards the physical characteristics of coastal water in Bidong Island
    (Terengganu: Universiti Malaysia Terengganu, 2012) Kok Poh Heng
    This investigation is aimed to determine the physical characteristics and also to determine the meteorological effects on the physical characteristics of coastal water in Bidong Island. Study on water temperature showed low albedo of sea water caused higher water temperature in late afternoon than in the morning and early afternoon. Nonetheless, strong wind decreased sea water temperature. While salinity distribution analysis showed evaporation result from solar radiation and strong wind increased sea water salinity. However, precipitation declined sea water salinity through dilution factor. When there is sunny daylight, sea water salinity and water temperature recorded higher. Mixed layer depth increased when the strong wind blows across sea water. The Temperature/Salinity (T/S) diagram has shown that, in July, the sea water in Bidong Island shared common characteristics with sea water in South China Sea (SCS) during the Southwest Monsoon. The analysis revealed that the current circulation near Bidong Island was influenced by tide. Costal water in Bidong Island flowed toward coastal area of Kuala Terengganu (Kn during rising while flowed away from coastal area near KT during falling tide. Nevertheless, strong wind is able to alter the current direction generated from tidal effect. Current speed is higher during rising tide if compare to falling tide.
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    Thermal Frontal Zone And Associated Coastal Upwelling Along The East Coast Of Peninsular Malaysia
    (Universiti Malaysia Terengganu, 2015-06) Kok Poh Heng; Marine and Environmental Sciences
    The main aim of this study is to investigate the thermal fronts and coastal upwelling along the east coast of Peninsular Malaysia (ECPM). In view of that, monthly sea surface temperature (SST) climatology data were used to achieve this goal. The factors responsible for the formation of thermal fronts and coastal upwelling were determined. In addition to SST, chlorophyll-a concentration, sea surface height (SSH) and marine fish landing data were used to examine the implications of coastal upwelling on the marine environments. Besides that, in order to provide and to compare the in-situ vertical structure of the water column between the upwelling and non-upwelling events, in-situ hydrographic cruises during the both periods were conducted. In general, the formation of thermal fronts along the ECPM is dependent on the monsoon system. During the northeast monsoon, the formation of thermal fronts along the ECPM is a result of the southward advection of cooler water tongue near South Vietnam and its’ location is influenced by the speed of southward flowing western boundary current in that region. As the speed of this current increase from November until January, the cooler water tongue moves closer to the ECPM and its recedes when the current moves at a slower rate between January and inter-monsoon.