Xiaomei Liao, Shenzhen University, Shenzhen, China, Guofeng Wu, Shenzhen University, Key Laboratory for Geo-Environmental Monitoring of Coastal Zone of the Ministry of Natural Resources, Shenzhen, China, Yan DU, South China Sea Institute of Oceanology, Chinese Academy of Sciences, State Key Laboratory of Tropical Oceanography, Guangzhou, China, Tianyu WANG, South China Sea Institute of Oceanology, CAS, Guangzhou, China, Qingyou He, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China and Haigang Zhan, SCSIO South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China