吉林省东部山区极端短时强降水特征分析  

Analysis on characteristics of extreme short term heavy precipitationin mountainous areas of the eastern Jilin Province

作　　者：王佳艳 王智宇[2] 丛宇辰 贾凡妮 张彤[2] Wang Jiayan;Wang Zhiyu;Cong Yuchen;Jia Fanni;Zhang Tong(Jian Meteorological Bureau,Jian 134299;Tonghua County Meteorological Bureau,Tonghua 134100;Taonan Meteorological Bureau,Taonan 137100)

机构地区：[1]集安市气象局,集安134299 [2]通化市气象局,通化134001 [3]洮南市气象局,洮南137100 [4]通化县气象局,通化134100

出　　处：《气象水文海洋仪器》2024年第3期91-95,共5页Meteorological,Hydrological and Marine Instruments

基　　金：通化市气象局科研课题(202304)资助。

摘　　要：文章根据吉林省地形地貌特征,选取东部山区20个国家地面气象观测站1975-2023年逐小时降水实况资料,利用百分位数方法建立各个国家站极端短时强降水的阈值,在此基础上分析东部山区极端短时强降水时空分布特征。结果表明:吉林省东部山区极端短时强降水阈值分布在20~33 mm,强度分布与阈值分布基本一致,频次分布与阈值分布呈负相关;极端短时强降水呈增多趋势,6月下旬至8月中旬频次最高;每日14:00-19:00极端短时强降水频次最高;极端短时强降水频次呈现准30~42年、18~24年的周期性波动。研究结果旨在为吉林省东部山区极端短时强降水的预报预警提供技术支撑。Based on the topographic and geomorphological characteristics of Jilin Province,this paper selects hourly precipitation data from 20 National Surface Meteorological Observation Stations in the eastern mountainous areas from 1975 to 2023,and uses the percentile method to establish the threshold of extreme short term heavy precipitation at each national station.Based on this,the spatical and temporal distribution characteristics of extreme short term heavy precipitation in mountainous areas of the eastern Jilin Province are analyzed.The results show that the thresh old of the extreme short-term heavy precipitation is between 20~33 mm,and the intensity distribution is basically consistent with the threshold distribution.The frequency distribution is negative correlated with the threshold distribution.Extreme short-term heavy precipitation shows an increasing trend,with the highest frequency from late June to mid August.The frequency of extreme short term heavy precipitation is highest from 14:00 to 19:00 every day.The frequency of extreme short term heavy precipitation shows periodic fluctuations of approximately 30~42 years and 18~24 years.The research results aim to provide technical support for the forelast and early warning of extreme short-term heavy precipitation in mountainous areas of the eastern Jilin Province.

关 键 词：极端短时强降水 分布特征 东部山区 

分 类 号：P426[天文地球—大气科学及气象学]