Spatial and temporal differences characteristics of the rainy season of Mainland China
Using the daily station rain gauge data of the 1710 stations during 1961-2012,the characteristics of the rainy season in Mainland China has been analyzed.For the onset time of the rainy season,the earliest area locates in the central western part of the Hengduan Mountain.Since then,the rainy season comes to the areas south of the Yangtze River.Next,with the out-break of the summer monsoon,most of China is in the rainy season.The ending of the rainy season firstly appears in the region south of the Yangtze River.Western China and the South China Sea show a later ending time with the latest ending time occur-ring in the northwest of Xinjiang.In terms of the duration of the rainy season,the shortest duration areas are North China and west the Tibetan Plateau.The rainy season in the central western part of the Hengduan Mountain,western China and the South China Sea is the longest.The temporal and spatial variations of mean pentad precipitation are analyzed by the empirical orthogonal function (EOF)method.The first,second and third EOF mode respectively reflect the spatial characteristics of rainfall mainly occurring in the summer,spring and autumn.
PrecipitationSeasonal evolutionEmpirical orthogonal function (EOF)Regional difference
国家科技期刊平台
NSTL
万方数据
维普
