*Bin Xie¹, Shin-ichi Ito², Lingfeng Huang³, Haiqing Yu⁴, Chenying Guo⁵, Ziqin Wang² (1.Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China, 2.Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa 277-8564, Japan, 3.College of the Environment and Ecology, Xiamen University, Xiamen 361102, China, 4.Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China, 5.South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China)