安庆市1961～2014年暴雨降水的气候变化特征

Climatic Variations of Rainstorm Events in Anqing City between 1961 and 2014

利用安庆市国家基本气象站1961~2014年逐日降水资料,分析了54年来安庆市暴雨的年际和年代际变化特征,结果表明：安庆地区暴雨日数平均5.5 d/a,暴雨日平均降水量为80.8 mm/d,大暴雨日数占暴雨总日数的18.1%,绝大多数暴雨事件（约82.3%）出现在汛期的5~9月;54年来安庆暴雨日数和暴雨日的平均降水量均呈增加的趋势,且年最大暴雨日出现的时间有推后的趋势。

The climatic characteristics of annual rainstorm in Anqing city are studied on the basis of daily precipitation observations data between 1961 and 2014. The results show that the annual mean rainstorm is 5. 5 days,and daily amount of rainstorms with a mean of 80. 8mm. About 82. 3% of the total rainstorm days occurr in the flood season（ May to September） with 30. 8% in June and 22% in July. The annual rainstorm days and amount of rainstorm in this region show a slight increasing trend over the past 54 years. Overall,the occurrence time of the largest rainstorm is delayed.