1980—2019年保定市结冰日气候变化特征

Climate Change Characteristics of Ice Days in Baoding City from 1980 to 2019

利用保定市16个气象站点的观测资料,采用线性趋势法分析了保定市1980—2019年结冰日的气候变化特征。结果表明:保定市平均结冰日151 d,最长结冰日出现在涞源(199 d),最短出现在满城(138 d);保定市平均结冰日数的气候倾向率为-3.689 d/10 a,94%的站点结冰日数呈减少趋势,易县结冰日数减少最明显,气候倾向率达-9.038 d/10 a;各站结冰日数的年代际差异比较明显,全市平均结冰日数总体上呈逐年代持续减少的趋势。

Using the observation data of 16 meteorological stations in Baoding City,this paper used the linear trend method to analyze the climate change characteristics of the ice days in Baoding City from 1980 to 2019.The results showed that the average ice days in Baoding City were 151 days,the longest ice days were 199 days in Laiyuan,and the shortest ice days were 138 days in Mancheng.The climatic tendency rate of the average ice days in Baoding City was-3.689 d/10 a,and 94%of stations showed a decreasing trend in ice days,the ice days in Yixian decreased most obviously,and the climatic tendency rate reached-9.038 d/10 a.The interdecadal differences of ice days at each station were relatively obvious,and the interdecadal change of the average ice days in Baoding City showed a decreasing trend.