Cite this paper:
Lin Xinyu, Qiu Yun, Du Yan, Zhou Xiwu, Xuan Lili, Xu Jindian. Study on the utilization of satellite remote sensing for variation characteristic of sea surface salinity in the Bay of Bengal[J]. Haiyang Xuebao, 2016, 38(5): 46-56

Study on the utilization of satellite remote sensing for variation characteristic of sea surface salinity in the Bay of Bengal

Lin Xinyu1, Qiu Yun1, Du Yan2, Zhou Xiwu1, Xuan Lili3, Xu Jindian1
1. Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China;
2. State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;
3. National Marine Data and Information Service, Tianjin 300171, China
Abstract:
Sea surface salinity (SSS) from Aquarius during August 2011 and March 2014, together with in situ salinity data (e.g. Argo) are used to explore seasonal and interannual variations of the SSS in the Bay of Bengal. It shows that Aquarius SSS has a significant positive correlation with Argo SSS. The Aquarius SSS is relatively lower than Argo SSS, and there exists a negative bias of -0.13 between these two data. The negative bias is larger in the northern bay than that in the southern bay (-0.28 vs -0.10). The bias mainly comes from the different depth between Aquarius and Argo floats in measuring SSS. Aquarius SSS captures main seasonal variations of the SSS in the bay, such as the intrusion of saltier water from Arabian Sea and seasonal migrations of the freshwater plumes in the northern bay. Besides, the SSS reveals anomalous salting (freshening) in the bay during the spring 2011 (2012). Our results suggest that the reduced (enhanced) precipitation during the summer 2010 (2011) in the northern bay reduced (enhanced) freshening in that region, and the anomalous salting (freshening) water was advected southward by the surface-layer circulation causing anomalous salting (freshening) in the whole bay. Meanwhile, the positive (negative) wind stress curl anomaly also contribute to the anomalous salting (freshening) event during spring 2011 (2012) in the bay via impacting the vertical mixing processes.
Key words:    Bay of Bengal    Aquarius    sea surface salinity    ocean circulation   
Received: 2015-06-29   Revised:
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Articles by Lin Xinyu
Articles by Qiu Yun
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Articles by Xuan Lili
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