Electronic Theses and Dissertation

ABSTRAK
Penelitian ini dilakukan untuk mengetahui pengaruh intensitas monsun terhadap sirkulasi arus permukaan di Selat Malaka selama tahun 2006 - 2010. Adapun data angin yang diperoleh dari National Centers for environmental Prediction (NCEP) sedangkan untuk pola arus permukaan disimulasikan dengan menggunakan HAMburg Shelf Ocean Model (HAMSOM) dengan grids lima menit. Hasil pengamatan menunjukkan bahwa selama Monsun Timur Laut (MTL) pola arus terbagi ke dalam dua bagian zonasi yakni, bagian barat dan bagian timur. Pada bagian barat arus cenderung lebih lemah bergerak ke utara dibandingkan dengan bagian timur. Pada Monsun Peralihan I arus bervariasi setiap tahunnya akibat pergerakkan angin tidak stabil sedangkan pada Monsun Barat Daya (MBD) dan Monsun Peralihan II pengaruh angin yang bergerak dari barat daya menuju timur laut menyebabkan laju arus permukaan paling kuat terjadi pada bulan Agustus 2006 – 2009 dan November 2006, yakni berkisar 20 – 100 cm/s. Pada periode ini arus dibagian utara Selat Malaka cenderung lebih kuat dibandingkan bagian tengah Selat Malaka (utara – selatan). Sepanjang tahun pergerakan arus selalu bergerak ke utara akibat level muka laut (sea surface hight) di selatan Selat Malaka lebih tinggi.

Kata kunci : Monsun, Arus Permukaan Laut dan HAMSOM.



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ABSTRACT
This study was conducted to find out influences intensity of monsoon concerned sea surface current in Malacca Straits during years 2006 - 2010. As for wind data were obtained from the National Centers for Environmental Prediction (NCEP) whereas patterns of current were simulated by Hamburg Shelf Ocean Model (HAMSOM) on 5 minutes grid. The observation showed that during the Northeast Monsoon, the patterns of current are divided into two parts zone i.e., western and eastern part. On the western portion current is moved to northward more slower than on the eastern portion. In transition of Monsoon, current is vary annually due to unstable wind movement whereas in Southwest Monsoon and secondly Transition of Monsoon, most powerfull current is built up due to wind is more moved from southwest toward northeast. Velocity of current recorded in August 2006 – 2009 and November 2006, was found between 20 – 100 cm/s. Velocity in the Northern Malacca Strait tend to be more powerful than the middle section of the Straits of Malacca (North-South) during this period. The annually movement of sea surface current is always to northward because sea surface level in southern Malacca straits is more high.

Key words: Moonson, Sea Surface Currents, and HAMSOM

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