辽西地区近50年降水趋势分析

Analysis of Precipitation Trend in Western Liaoning in the Past 50 Years

降水作为衡量一个地区干湿程度的重要指标,有助于了解地区气候变化,可提前对灾害性天气做好防护措施,减少损失。利用1965—2014年辽西地区(阜新市、朝阳市、锦州市、建昌县、绥中县、兴城市)6个气象观测站的日降水量资料,通过线性趋势分析研究了辽西地区近50年降水的年度及季节变化特征。结果表明:辽西地区年降水以及夏季、秋季、冬季降水均呈不显著的减少趋势,其中夏季减少幅度最大,气候倾向率为-6.73 mm/10年,春季降水趋于增加,气候倾向率为2.98 mm/10年。

As an important index to measure the degree of dryness and wetness in a region,precipitation is helpful to understand the regional climate change,and can take preventive measures against disastrous weather in advance to reduce losses.Based on the daily precipitation data of six meteorological stations(Fuxin City,Chaoyang City,Jinzhou City,Jianchang County,Suizhong County and Xingcheng city)in Western Liaoning from 1965 to 2014,the annual and seasonal variation characteristics of precipitation in Western Liaoning in recent 50 years were studied by linear trend analysis.The results show that:the annual precipitation and the precipitation in summer,autumn and winter in Western Liaoning show no significant decrease trend,among which the decrease in summer is the largest,the climate tendency rate is-6.73mm/10 year,and the precipitation in spring tends to increase,and the climate tendency rate is 2.98mm/10year.