1. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
2. Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, BC V8L 4B2, Canada
3. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China
4. Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China