Impact on the chlorophyll concentration in the Bay of Bengal and Arabian Sea during Indian Ocean dipole mode |
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| Authors: | Sobhan Kumar Sahu Hong Joo Yoon Denny Widhiyanuriyawan |
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| Affiliation: | 1. College of Environmental and Marine Science and Technology, Pukyong National University , Daeyeon 3-Dong Nam-Gu, Busan , 608 737 , South Korea drsobhan111@gmail.com;3. College of Environmental and Marine Science and Technology, Pukyong National University , Daeyeon 3-Dong Nam-Gu, Busan , 608 737 , South Korea |
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| Abstract: | The chlorophyll (Chl) concentration in the seawater of the Bay of Bengal (BoB) and the Arabian Sea (AS) changes most during the Indian Ocean dipole (IOD) mode event. The empirical orthogonal function (EOF) of several oceanographic and atmospheric data was studied, using 9 years (1998–2006) of reanalysed satellite data. The variation of Chl during the period of September to November (SON) over the 9 years has been studied in this article. It has been found that significant enhancement of Chl in the BoB takes place during IOD years owing to the surface wind action, that is, wind-stress curl (WC), which favours the upwelling process, whereas the AS shows a decline in concentration of Chl owing to a reduced open ocean upwelling process. |
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