Wenlong Xu¹, Guifen Wang², Xiaogang Xing³, Marin Cornec⁴, Bingzhang Chen⁵, Alexander Hayward⁶ and Xuhua Cheng², (1)Jiangsu University of Science and Technology, Ocean College, Zhenjiang, China, (2)Hohai University, Nanjing, China, (3)Second Institute of Oceanography, State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou, China, (4)University of Washington Seattle Campus, Seattle, United States, (5)University of Strathclyde, Mathematics and Statistics, Glasgow, United Kingdom, (6)Danish Meteorological Institute, Copenhagen, Denmark