摘要
利用庆阳市8个气象站1965—2020年的逐日降水、总云量及日照资料,分析了连阴雨的时空分布特征。结果表明,近56年,庆阳市平均年降水日数以及降水量均呈增加趋势,降水日数和降水量的变化将导致连阴雨天气发生改变;年连阴雨场次的空间分布与年降水日数的分布相似,中南部多于北部,发生连阴雨最多的是最南部的宁县和正宁县。连阴雨的年代际变化非常明显,庆阳市连阴雨发生次数在1970—1989年有明显增加趋势,1990年后呈减少趋势;2000年开始又呈增多趋势,特别是2007年,大部分县站年连阴雨出现5次;进入2010年后,连阴雨又呈下降趋势。连阴雨的月季特征表明,秋季连阴雨过程最多,夏季次之,春季最少;秋季连阴雨相对而言强度大,春季连阴雨强度小。
Based on the daily precipitation,total cloud volume and sunshine data of 8 weather stations in Qingyang city from 1965 to2020,the temporal and spatial distribution of even rainy were analyzed.The results show that in the past 56 years,the average annual precipitation days and precipitation in Qingyang city have increased,and the change of precipitation days and precipitation will lead to changes in rainy weather.The spatial distribution of the annual rainy field is similar to that of the annual precipitation days,with more rain in the south-central part than in the north,and the southerner Zhengning county and Ning county with the most rain.The interyear change of rain is very obvious,the frequency of continuous rain in Qingyang city increased significantly from 1970 to 1989,and decreased after 1990;In 2000 began to show an increasing trend,especially in 2007,most county stations had five consecutive rainy days a year;Since 2010,even the rain has been on a downward trend.The characteristics of the rainy monthly season show that autumn has the most rainy process,summer is second and spring is the least;Autumn even rain is relatively strong,spring even rain intensity is small.
作者
张峰
刘英
柳东慧
ZHANG Feng;LIU Ying;LIU Dong-hui(Qingyang Meteorological Bureau of Gansu Province,Qingyang 745000,Gansu,China)
出处
《湖北农业科学》
2021年第S02期184-187,256,共5页
Hubei Agricultural Sciences
基金
庆阳市气象局科研项目(QY2021-3)
关键词
连阴雨
气候特征
时空分布
庆阳市
even rainy
climate characteristics
temporal and spatial distribution
Qingyang city
作者简介
张峰(1977-),女,甘肃庆阳人,工程师,主要从事气象预报服务研究工作,(电话)13884187282(电子信箱)182449214@qq.com。
