Qingquan Li¹, Xiaoge Xin², Min Wei³, Wei Zhou⁴, Yong Luo⁵ and Zongci Zhao⁵, (1)China Meteorological Administration, National Climate Center, Beijing, China, (2)China Meteorological Administration, National Climate Center, Beiging, China, (3)China Meteorological Administration, National Meteorological Information Center, Beijing, China, (4)Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou, China, (5)Tsinghua University, Beijing, China