1957—2015年宿州市不同级别降水事件变化特征

Characteristics of Precipitation Events at Different Levels in Suzhou from 1957 to 2015

利用1957—2015年宿州市5个气象站降水资料,采用线性倾向估计、趋势分析及Mann-Kendell等方法,分析了宿州市降水量、降水日数及降水强度的变化特征。结果表明,年降水量呈增多趋势,年降水量增多主要是由于夏季暴雨降水量的增加引起的。年降水日数呈显著减少的趋势,年降水日数的减少主要是由于春季小雨日数的减少引起的。年降水强度呈显著增加的趋势,年降水强度的增加主要是由于降水量增多和降水日数减少造成的。年降水日数和年降水强度分别在1985年和1990年发生了突变。

The change characteristics of Suzhou precipitation and precipitation days and precipitation intensity were analyzed, using lin ear trend estimate, trend analysis and Mann-Kendell method, by the precipitation data of 5 meteorological stations in Suzhou City from 1957 to 2015. The results showed that the annual precipitation increased and the annual precipitation increased mainly due to the increase of rainstorm and precipitation in summer. The number of annual precipitation decreased significantly, and the decrease of annual precipitation was mainly due to the decrease of spring light rain days. The annual precipitation intensity increased significandy, and the increase of annual precipitation intensity was mainly due to the increase of precipitation and the decrease of precipitation days.The annual precipitation days and the annual precipitation intensity were mutated in 1985 and 1990 respectively.