根据去年秋冬季西太平洋副热带高压持续偏弱的变化情况;大气环流、海气、日地关系及降水周期等因素的演变规律。中央气象台、中科院大气 According to the persistent weakness of the western Pacific subtropical high in the autumn and winter of last year, the evolution of the atmospheric circulation, sea-air, the relationship between Japan and the Earth and the precipitation cycle and other factors. Central Meteorological Station, Chinese Academy of Sciences