Xiaohui Liu, Second Institute of Oceanography, State Oceanographic Administration of China, State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou, China, Dong-Ping Wang, Stony Brook University, Stony Brook, NY, United States, Dake Chen, Second Institute of Oceanography, State Oceanographic Administration of China, Hangzhou, China, Changming Dong, University of California, Department of Atmospheric and Oceanic Sciences, Los Angeles, United States and Tongya Liu, Zhejiang University, Hangzhou, China