Coastal upwelling in Southern Coast of Sumbawa Island, Indonesia

3rd International Symposium on LAPAN-IPB Satellite For Food Security and Environmental Monitoring 2016

地球科学;轻工业;生态环境科学

Taufikurahman, Qamal^1 ; Hidayat, Rahmat^1

Department of Geophysics and Meteorology, Faculty of Mathematics and Natural Science, Bogor Agricultural University, Bogor, Indonesia^1

关键词: Average values;    Chlorophyll a;    Chlorophyll-a concentration;    Coastal upwelling;    Ekman pumping;    Ekman transport;    Indian ocean;    Interannual variation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/54/1/012075/pdf
DOI  :  10.1088/1755-1315/54/1/012075

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Circulation and water mass characteristics in southern coast of Sumbawa Island is strongly influenced by monsoon which change each season. This research aims to (1) identify the Ekman transport and Ekman pumping variations and (2) analyse the SST and chlorophyll - A variability. During Juni-July-August (JJA) season, the highest value of Ekman transport (-0.72 m2s-1) moves the water mass towards Indian Ocean while Ekman pumping (0.15x10-4m2s-1) rises the water mass to the surface (upwelling). Impact of coastal upwelling was identified by cooling SST and high chlorophyll-a. Coolest SST (26.58°C) associated with highest chlorophyll - A (0.6 mg m-3) were found in JJA season. Inter-annual variation of SST and chlorophyll - A concentrations during 2003-2015 is driven by Ekman transport and Ekman pumping. Coolest SST and highest chlorophyll - A were found in JJA season in 2006 with an average value of 25.98°C and 0.78 mg m-3, also in JJA season in 2008 with an average value of 26°C and 0.71 mg m-3. Thus the process of Ekman transport and Ekman pumping has an important role in lifting the cold water high nutriens from the deeper layer to surface. The high concentration of chlorophyll - A in water is the impact of appointment nutrient from the deeper layer by the coastal upwelling.