中文摘要：

根据1980—2009年研究区13个气象台站气温和降水数据,分析了近30年典型喀斯特区域长江、珠江分水岭处的气候变化,比较了研究区气候变化的时空分布特征,力求说明该区域近30年的气候变化趋势。结果表明：（1）研究区近30年气候变化的整体趋势是平均气温呈上升趋势、年降水量呈下降趋势。（2）按照年代际变化趋势,1990年为研究区的快速升温期,降水则分为1980—1990年的下降期、1990—2000年的上升期和2000年以来的平稳期3个时段。（3）气候变化速率呈现一定的差异性,研究区内珠江流域气温的变化速率小于长江流域,而降水的变化速率则相反,且分水岭线上的降水变化速率均高于两个流域内部。

英文摘要：

According to the temperature and precipitation data from 1980 to 2009 of the thirteen meteorological stations in the study area,this paper analyzed the climate change of the watershed which were the typical Karst region between Yangtze River and Pearl River in the recent thirty years and its temporal and spatial distribution characters in order to estimate the climate change trend in the past thirty yeas of the study area.The results showed that,（1） the whole trend of climate change of the study area in the three decades was that the average temperature was on the rise and the annual precipitation showed a decrease.（2） On the basis of the inter-annual variation trend,it was a temperature raising period in the 1990s and the precipitation was divided into three periods： the declining phase from 1980s to 1990s,the raising phase from 1990s to 2000s and the stationary phase since 2000s.（3）There were differences of the rate of climate change,the temperature change rate of the Pearl River basin was less than the Yangtze River basin while the precipitation change rate was opposite and the divide line’s precipitation change rate was greater than that of the both basins.