摘要

<正>In early summer, a quasi-stationary rain band usually extends from Yangtze-Huaihe Basin in China to the east of Japan, accounting for over 30% the annual total rainfall there. This episode of rainy season is named as Meiyu in China, Baiu in Japan and Changma in Korea(hereafter Meiyu-Baiu). The multi-timescale variation of Meiyu-Baiu rainfall could have great impacts,