Analisis Pola Arus Laut Permukaan Perairan Indonesia Dengan Menggunakan Satelit Altimetri Jason-2 Tahun 2010-2014

Ocean Current is a mass movement of flowing water caused by wind, differences in density, or long wave movement. At the present time many ocean currents used for various purposes that support human life. However, current data acquisition using conventional tools is very difficult for the vast territory and require a huge cost, therefore we use data from altimetry satellites. With the development of altimetry satellite system, one of the Jason-2 altimetry satellites which offer data on wind direction and the speed of wind that will go through the calculation method to get the surface ocean currents data of Indonesian waters.This study took place in Indonesian waters which is located within 6 ° 08 'N - 11 ° 15' S and 94 ° 45 'E - 141 ° 05' E. The data used in this research is GDR (Geophysical Data Record) data of Jason-2 altimetry satellites in 2010-2014. GDR data contains 36 pass (the orbital paths) in a single cycle, which one cycle can be reached within ten days. The method used is the calculation of the direction and speed of ocean currents surface of each cycle with Stewart equation.The results of this study indicate that when West monsoon occurs from December to February, the wind is blowing from the West to the East, so the current is also moving from the Asian continent towards the Australian Continent. In the event of East monsoon which is from June to August, the wind is blowing from the East to the West, so the current is also moving from the Australian continent towards the Asian continent. Meanwhile, during a transitional season either the transition from monsoon West to monsoon East which is from March to May and during the transition from monsoon East to monsoon West which is from September to November, the current's movement is irregular and tend to fall into two directions, ie from the Asian continent towards Australian continent and from the Australian continent to the Asian continent, but the average speed of the current is weak in almost all Indonesian waters. The current pattern of sea surface modeling results indicate some current directions are not the same as Wyrtki current model, but some current directions are also the same as Wyrtki current model in several water location samples such as Arafuru Sea, the water around the Java island, the water west of the Sumatra island, the water north of the Papua island, and the Strait of Karimata