Browsing by Author "MOHD FADZIL AKHIR"

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    COASTAL UPWELLING IN THE VICINITY OF TIOMAN ISLAND
    (The International Seminar on the Straits of Malacca and the South China Sea 2016, 2016) ZURAINI ZAINOL; MOHD FADZIL AKHIR
    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.
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    REVIEW OF CURRENT CIRCULATION STUDIES IN THE SOUTHERN SOUTH CHINA SEA
    (Journal of Sustainability Science and Management, 2014) MOHD FADZIL AKHIR
    Studies of current circulations research progress in the region of the southern South China Sea (SCS) are reviewed. Scientifc research exploration in the area is relatively low compared to other areas in the SCS, thus the understanding of the current system and its dynamics are lacking. In general, SCS basins circulation is influenced by monsoon seasons which provide cyclonic circulation in winter (northeast monsoon) and anti-cyclonic circulation in summer (southwest monsoon). Near Peninsular Malaysia, the alongshore current which is part of the bigger circulation flow southward/ northward during winter/summer, respectively. Recently, numerical modeling studies are able to provide more insight of the dynamics by illustrating the influence of bathymetry on circulation and the formation of subsurface eddys in the middle of the region. Furthermore, the current circulation pattern changes throughout monsoon seasons and transition monsoon period were elaborated. This review gathers properties and current dynamics from feld observation and numerical models research and summarized it in terms of the SCS seasonal circulation and interaction between the main basins and the southern region of Peninsular Malaysia.
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    WATER CIRCULATION IN THE SHALLOW SHELF AREAS OFF THE TERENGGANU COAST AFFECTED BY WIND STRESS FORCE USING A HYDRODYNAMIC MODEL
    (The International Seminar on the Straits of Malacca and the South China Sea 2016, 2016) NURUL RABITAH DAUD; MOHD FADZIL AKHIR; MOHD LOKMAN HUSAIN
    The dynamic of circulation patterns in Terengganu waters largely dominated by wind forcing specifially the monsoon wind. In order to understand this dynamic, a hydrodynamic model is applied to simulate the major circulation patterns in Terengganu waters. The model used is a three-dimensional simulation MIKE 3 Flow Model FM by Danish Hydrological Institute (DHI). The model exhibit that the current flwed in the same direction with prevailing monsoon winds. While the current speed was dominated by magnitude of monsoon winds. The maximum current speed recorded during SW monsoon was 0.327 m/s and 0.478 m/s during NE monsoon. Additionally, the model was able to capture the convergence and divergence current patterns during SW and NE monsoon seasons respectively. This convergence and divergence current features occurred at 5.5 oN to 6oN latitude off the Terengganu waters. The convergence–divergence current pattern was suggested due to monsoon winds and effect from circulation in Gulf of Thailand. The study fialize the variability and dynamic of current circulation patterns in Terengganu waters are largely inflenced by monsoon winds and effect from the Gulf of Thailand circulation.