近50年浙江省暴雨时空分布特征及对农业的影响  

Temporal and Spatial Distribution Characteristics of Heavy Rainfall in Zhejiang Province in Recent 50 Years and Its Impact on Agriculture

作　　者：贾安琪 姚佳骏 李美琳 马晓云 Jia An-qi(Shaoxing Meteorological Bureau,Shaoxing,Zhejiang 312000)

机构地区：[1]绍兴市气象局,浙江绍兴312000 [2]嵊州市气象局,浙江嵊州312400

出　　处：《农业灾害研究》2023年第6期73-75,共3页Journal of Agricultural Catastrophology

摘　　要：基于浙江省64个气象站日降水数据,对近50年浙江暴雨的时空变化趋势进行研究,发现20世纪70年代中期和90年代末期为暴雨雨量较大的2个时段,浙江暴雨主要集中在5—9月,以6月最多。大暴雨集中在6—9月,8月最多。特大暴雨集中在7—10月,9月最多。在1971—1995年,暴雨雨量存在明显的12年主周期,1995年后有较弱的21年副周期,而在整个50年尺度上存在5年短周期。研究暴雨空间分布发现,4—6月暴雨雨量大值区在西南地区、8—9月暴雨雨量大值区在东南地区。从暴雨日数上看,8—10月暴雨与大暴雨日数均呈“东多西少”分布。并探讨了暴雨天气下农作物的预防及应对措施,以期能在一定程度上减少经济损失。Based on the daily precipitation data of 64 meteorological stations in Zhejiang Province,this paper studied the spatiotemporal variation trend of heavy rain in Zhejiang Province in the past 50 years.It was found that the middle 1970 s and the 1980 s to the end of the 1990 s were periods of heavy rainfall,and heavy rain in Zhejiang mainly concentrated in May and September,with the largest in June.The heavy rain was concentrated in June and September,and the most in August.The heavy rain was concentrated in July to October,with the largest in September.Between 1971 and 1995,there was an obvious 12-year main period of rainstorm rainfall,and a weak 21-year sub-period after 95 years,while there was a 5-year short period on the entire 50-year scale.According to the research on the spatial distribution of rainstorm,the area with high rainfall from April to June was in the southwest,and the area with high rainfall from August to September was in the southeast.In terms of the number of rainstorm days,the number of rainstorm days and heavy rainstorm days from August to October were“more in the east and less in the west”.Finally,this paper discussed the prevention and response measures of crops under rainstorm weather,which can reduce economic losses to a certain extent.

关 键 词：暴雨 时空特征 农业 

分 类 号：P426.62[天文地球—大气科学及气象学]