浙江省丽水市近50a夜雨时空分布特征

Temporal and spatial distribution characteristics of night precipitation in Lishui of Zhejiang in recent 50 years

文章根据丽水各县(市、区)1971—2020年逐日降水资料,采用多尺度趋势分析方法分析夜雨(20:00—08:00降水)的时空分布特征和演变趋势,以期为农业生产服务。结果表明:丽水冬半年降水量虽少,但夜雨发生比例较大,尤其以1月夜雨率最大;空间上中东部夜雨率较高,且以云和县1月份夜雨率最高。夏半年降水量明显,但夜雨发生比例较小,尤其以7月夜雨率最低;空间上北面夜雨率较低,且以遂昌县1月份夜雨率最低。

Based on the daily precipitation data of each county,city and district in Lishui from 1971 to 2020,the temporal and spatial distribution characteristics and evolution trend of night rain precipitation from 20:00 to 08:00 were analyzed by using multi-scale trend analysis method in order to serve agricultural production.The results show that although the precipitation in Lishui is less in winter half year,the proportion of night rain is larger,especially in January.The night rain rate is high in the middle east of space,and the highest in January in Yunhe.The summer precipitation is obvious,but the proportion of night rain is small,especially in July.The night rain rate is low in the north of space and the lowest in January in Suichang.