The Influence of Indian Ocean Dipole (IOD) on The Variability of Sea Surface Temperature and Precipitation in Sumatera Island

3rd International Conference of Indonesia Society for Remote Sensing

地球科学;计算机科学

Ibnu Khaldun, Muhammad Hafidz^1 ; Wirasatriya, Anindya^1,2 ; Dwi Suryo, Agus Anugroho^1 ; Kunarso^1

Oceanography Departement, Faculty of Fisheries and Marine Science, Diponegoro University, Prof. H. Sudarto, SH Street, Semarang

50275, INA, Indonesia^1

Center for Coastal Disaster Mitigation and Rehabilitation Studies, Diponegoro University, Semarang, Prof. H. Sudarto, SH Street, Semarang, INA

50275, Indonesia^2

关键词: Dipole mode indices;    Global climates;    High resolution remote sensing;    Indian ocean dipoles;    Precipitation data;    Sea surface temperature (SST);    SST anomalies;    Sumatra;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/165/1/012008/pdf
DOI  :  10.1088/1755-1315/165/1/012008

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Sumatera Island is located adjacent to the ocean and directly influenced by the dynamic of Indian Ocean. Indian Ocean Dipole (IOD) as one of the global climate factor has a big impact towards this dynamic. As it aims to get the influence of IOD towards Sumatera water area, high-resolution remote sensing data is needed. Those are Sea Surface Temperature (SST), precipitation, and Dipole Mode Index (DMI). DMI is calculated by the differentiation of SST anomaly. IOD condition is emphasized by using precipitation data. Area observed is divided into three areas which are in series West Sumatera water, East Sumatera water, and Bukit Barisan highland. During IOD negative, the precipitation values were estimated 5,43; 4,63; 4,5 mm/hr sequentially. Meanwhile, during IOD positive, those values were 2,74; 3,47; 3,11 mm/hr sequentially. It is shown that IOD has the impact of the precipitation values in Sumatera waters. By showing the higher value of IOD negative and the lower value on IOD positive. West Sumatera water is observed as the most influencing area by the dynamic of IOD. Topography is also influencing towards the precipitation and it is shown by its values weather on IOD negative or positive.