吉林省短时强降水时空特征分析  

Analysis of spatiotemporal characteristics of short-term heavy rainfall in Jilin Province

作　　者：王智宇[1] 谷雨 郭阳 刘壮华[1] Wang Zhiyu;Gu Yu;Guo Yang;Liu Zhuanghua(Tonghua Meteorological Bureau,Tonghua 134001;Ji'an Meteorological Bureau,Ji'an 134299)

机构地区：[1]通化市气象局,通化134001 [2]集安市气象局,集安134299

出　　处：《气象水文海洋仪器》2024年第2期66-69,共4页Meteorological,Hydrological and Marine Instruments

基　　金：吉林省气象局科研课题(2019036)资助。

摘　　要：文章利用吉林省51个国家地面气象观测站1994—2023年4—10月逐小时降水资料,通过对短时强降水时间尺度、空间尺度进行分析,揭示吉林省短时强降水时空分布特征及变化规律。结果表明:1994—2023年短时强降水频次呈现先下降后上升的趋势;5—9月为吉林省短时强降水集中期,其中7—8月发生频次最多;短时强降水最早出现在5月15日前后,最晚出现在9月10日前后;降水日变化呈现双峰结构;降水空间分布不均匀。研究结果以期为短时强降水的预报提供气候背景,为预报预警服务提供参考依据。This article uses hourly precipitation data from 51 national surface meteorological observation stations in Jilin Province from April to October from 1994 to 2023.By analyzing the temporal and spatial scales of short-term heavy rainfall,the spatiotemporal distribution characteristics and variation patterns of short-term heavy rainfall in Jilin Province are revealed.The results show that from 1994 to 2023,the frequency of short-term heavy rainfall showed a trend of first decreasing and then increasing.May to September is the concentrated period of short-term heavy rainfall in Jilin Province,with the highest frequency occurring from July to August.The earliest occurrence of short-term heavy rainfall was around May 15th,and the latest occurred around September 10th.The daily variation of precipitation presents a bimodal structure.The spatial distribution of precipitation is uneven.The research results are expected to provide climatic background for short-term heavy rainfall forecast and provide reference for forecasting and early warning services.

关 键 词：短时强降水 时间演变特征 空间演变特征 吉林省 

分 类 号：P458.2[天文地球—大气科学及气象学]