Ruibin Xia, Nanjing University of Information Science & Technology, Nanjing, China, Zhaomin Wang, Hohai University, China, Andrew Stewart, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, United States, Chengyan Liu, Nanjing University of Information Science and Technology, Nanjing, China and Chen Cheng, Nanjing University of Information Science & Technology, School of Marine Sciences, Nanjing, China