Key Laboratory of Meteorological Disaster of Education(KLME)/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Institute for Climate and Application Research(ICAR) University of Information Science and Technology 210044;
School of Atmospheric Sciences Key Laboratory of Mesoscale Severe Weather/Ministry of Education University 210023;
seasonal tropical cyclone activity; interannual variation; global ocean-atmosphere coupled forecast system;