安徽省近50余年降水量时空变化特征分析

利用安徽省内15个和周边17个气象台站1957-2008年的降水资料,运用线性倾向估计和ArcGIS软件的空间分析等方法,分析从1957-2008年安徽省降水量的时空分布规律和长期变化趋势,并选取900mm,1200mm,1500mm为特定等值线,通过对特定等值线的变化来分析不同年代降水量的空间差异.研究结果表明：安徽省近50余年来降水整体上呈上升趋势,省内各区域降水差异较大,呈南多北少,山区多平原少的特点;从各区域降水的变化趋势来看,南方山区逐步减少,而北方平原呈逐步增加的趋势,南北降水差距在不断缩小.

Temporal and spatial distribution of precipitation over Anhui province in recent 50 years

Based on the precipitation database collected from 1957 to 2008 in Anhui province, the precipitation features are analyzed through temporal and spatial distribution. The research method adopts linear tendency estimate and ArcGIS software, choosing 900 mm, 1200 mm, 1500 mm for a specific contours, to analyze the changes. The result shows that the precipitation is on the rise, However the regional precipitation of this province is different. And the precipitation is higher in the south than in the north, and mountain higher than the plains. The south mountain precipitation has gradually reduced, while the northern plains gradually increased, so the gap between North and South precipitation is more and more smaller.