朝阳夏季极端降水变化趋势分析  

Analysis on Change Trend of Extreme Precipitation in Summer in Chaoyang

作　　者：刘丹丹 梁丰 于跃 于芳健 王宏超 余克勤 李璇 LIU Dan-dan(Chaoyang Meteorological Bureau,Chaoyang,Liaoning 122000)

机构地区：[1]朝阳市气象局

出　　处：《农业灾害研究》2019年第5期79-81,104,共4页Journal of Agricultural Catastrophology

摘　　要：利用朝阳站(54324)1961—2017年逐日降水资料,通过线性回归、气候倾向率等方法,分析了朝阳地区夏季极端降水事件的变化规律。结果表明,朝阳地区强降水量(R95)和极端降水量(R99)都呈减少趋势,年际倾向率分别为-11.1和-6.7mm/10年。近57年朝阳地区夏季连续干旱日数(CDD)呈增加趋势,年际倾向率为0.33d/10年,连续湿润日数(CWD)小幅减少,气候倾向率为-0.03d/10年。Based on the daily precipitation data of Chaoyang station(54324)from 1961 to 2017,the variation regularity of extreme precipitation events in summer in Chaoyang area was analyzed by means of linear regression and climatic tendency rate.The results showed that both heavy precipitation(R95)and extreme precipitation(R99)in Chaoyang area showed a decreasing trend,and the annual trend rates were-11.1 and-6.7 mm per 10 years,respectively.In recent 57 years,the number of consecutive dry days(CDD)in Chaoyang in summer showed an increasing trend.The annual trend rate was 0.33 days per 10 years,the continuous wet days(CWD)decreased slightly,and the climatic trend rate was-0.03 days per 10 years.

关 键 词：朝阳 极端降水事件 极端降水指数 

分 类 号：P426.6[天文地球—大气科学及气象学]