1961-2011年太原市降水气候特征分析

Climate Characteristics of Precipitation in Taiyuan City during 1961-2011

根据1961-2011年山西省太原气象站的降水资料,采用线性趋势分析、滑动平均等方法,研究了太原市的降水特征。结果表明,太原市51年平均降水量为442.5 mm,年最大降水量748.9 mm(1969年),年最小降水量216.1 mm(1972年),夏秋季降水较多,冬春季降水较少。太原市51年的降水总体为波动中减少的趋势,降水总趋势以每年1.39 mm变化率减少,春季降水以每年0.07 mm变化率减少,秋季降水以每年0.11 mm变化率减少,夏季降水以每年0.24 mm变化率减少,冬季变化甚微。

According to the weather sta- tion precipitation data of Taiyuan in Shanxi Province during 1961-2011, us- ing linear trend analysis and moving av- erage method, the characteristics of pre- cipitation of Taiyuan City were studied. The results showed that the average an- nual rainfall in Taiyuan City was 442.5 mm in 51 years. The annual maximum precipitation was 748.9 mm （1969）, and the minimum annual precipitation was 216.1 mm （1972）. Summer and autumn precipitation, less in winter and spring. The precipitation in Taiyuan City for 51 years of the fluctuations in the overall decreasing trend, and the total trend of precipitation change rate reduced by 1.39 mm a year. Spring precipitation change rate reduced by 0.07 mm a year, and pre- cipitation change rate in autumn reduced by 0.11 mm a year. Summer precipita- tion change rate reduced by 0.24 mm a year, but there was little change in winter.