Yansong Liu1,2,3, Qiang Ren1,2,3*, Fei Yu1,2,3,4*, Chuanjie Wei1, Xinyuan Diao1 and Feng Nan1,2,3 1Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China 2Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China 3Laboratory for Ocean and Climate Dynamics, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China 4University of Chinese Academy of Sciences, Qingdao, China Surface and Subsurface currents...