Lei Zhou, Shanghai Jiao Tong University, School of Oceanography, Shanghai, China, Cong Gao, Princeton University, Princeton, United States, I-I Lin, National Taiwan University, Taipei, Taiwan, Chunzai Wang, State Key Laboratory of Tropical Oceanography, SCSIO, Chinese Academy of Sciences, Guangzhou, China, Shoude Guan, Ocean University of China, Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory, Qingdao, China, Fei-Fei Jin, University of Hawaii at Manoa, Department of Atmospheric Sciences, Honolulu, HI, United States and Raghu Murtugudde, Indian Institute of Technology Bombay, Centre for Climate Studies, Mumbai, India