Effect of ENSO on the variability of SST and Chlorophyll-a in Java Sea

3rd International Conference on Tropical and Coastal Region Eco Development 2017

地球科学;生态环境科学

Wirasatriya, Anindya^1,2 ; Prasetyawan, Indra B^1,2 ; Triyono, Chandra D^1 ; Muslim^1 ; Maslukah, Lilik^1,2

Department of Oceanography, Faculty of Fisheries and Marine Science, Diponegoro University, Semarang, Indonesia^1

Center for Coastal Disaster Mitigation and Rehabilitation Studies, Diponegoro University, Semarang, Indonesia^2

关键词: Chlorophyll a;    ENSO;    Java seas;    Marine productivity;    Monsoon;    Sea surface temperature (SST);    Seasonal variability;    Southern oscillation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/116/1/012063/pdf
DOI  :  10.1088/1755-1315/116/1/012063

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Sea surface temperature (SST) and chlorophyll-A (Chl-A) are two parameters often used for identifying the marine productivity. Located at the maritime continent, the variability of SST and Chl-A in the Indonesian seas is influenced by El Niño Southern Oscillation (ENSO). The previous studies showed that the effect of El Niño tend to decrease SST and increase Chl-A in the areas within the Indonesian seas. Using long time observation of satellite data (2003-2016), it was found different result in Java Sea. Since Java Sea has strong seasonal variability influenced by monsoon wind, the effect of ENSO depend on the season. During southeast monsoon season, El Nino (La Nina) tend to increase (decrease) the speed of southeasterly wind cause the decrease or increase of SST. On the contrary, during northwest monsoon season, El Niño (La Niña) tend to decrease (increase) the speed of northwesterly wind cause the increase (decrease) of SST. The dependence of Chl-A on wind speed is only observed in the off shore which exhibit the strong seasonal variation. However, the effect of ENSO on the variability of Chl-A is not robust since the effected amplitude is less than the RMSE of Chl-A data.