1. a Research Centre of Remote Sensing on Marine Ecology and Environment (RSMEE) and State Key Laboratory of Tropical Oceanography (LTO) , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , 510301 , China
2. b Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institutes, Jinan University , Guangzhou , 510632 , China
3. c Institute of Space and Earth Information Science, The Chinese University of Hong Kong , Shatin, Hong Kong , China