Jianwei Chi^1,2, Yan DU³, Yuhong Zhang⁴, Xunwei Nie⁵, Ping Shi⁶ and Tangdong Qu¹, (1)University of California Los Angeles, Los Angeles, CA, United States, (2)South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, (3)South China Sea Institute of Oceanology, Chinese Academy of Sciences, State Key Laboratory of Tropical Oceanography, Guangzhou, China, (4)SCSIO South China Sea Institute of Oceanology, Chinese Acaademy of Sciences, Guangzhou, China, (5)Institute of Oceanology, CAS, Qingdao, China, (6)So China Sea Inst Oceanology, Guangzhou, China