干旱地区农业研究2009，Vol.27Issue(4)：254-260,7.
河西走廊东部降水日数及强度的时空特征
Temporal-spatial distribution characteristics of precipitation event frequency and intensity in east of Hexi corridor
摘要
Abstract
Daily rainfall data of 5 weather stations in east of Hexi corridor from 1971～2007 are used to analyze the temporal and spatial va riation of precipitation events. The results show that the precipitation is rela tively in an increase trend in east of Hexi corridor; The number of days of aver aged rain, light rain, moderate rain and heavy rain in the area increases, and t he annual raining days show a significant increasing trend, which is mostly due to the increasing of the days of light rain; The intensity of annual precipitati on shows a significant increasing trend due to the increasing of light rain, and the intensity of moderate rain shows a significant decreasing trend; The number of days of averaged rain, light rain, moderate rain and heavy rain in east of H exi corridor decreases from south to north, and the number of days of averaged r ain has a significant increasing trend in Minqin, Gulang, Yongchang and Wushaoli ng but has a significant decreasing trend in Liangzhou; The intensified centre o f annual precipitation is in the southern mountain area of Gulang, while the wea kest is in the central part of Liangzhou, and the intensity of annual precipitat ion shows a significant increasing in Minqin, Liangzhou, Yongchang and Wushaolin g, but has a slight decreasing trend in Gulang; The events of light rain are mor e frequent in 1980s, and the events of moderate rain and heavy rain are more fre quent during the period from the 1990s to the period of 2001～2007; The intensit y of light rain and heavy rain is the strongest, and moderate rain intensity is the weakest in the period of 2001～2007.关键词
河西走廊东部/降水事件/时空变化Key words
east of Hexi corridor/precipitation event/temporal and spatial variation分类
农业科技引用本文复制引用
李玲萍,李岩瑛,盖晓平..河西走廊东部降水日数及强度的时空特征[J].干旱地区农业研究,2009,27(4):254-260,7.基金项目
甘肃省气象局第四批"十人计划"项目 （）
