基于自动站资料的梧州市短时强降水时空特征分析  

Analysis of the spatial and temporal distribution characteristics of short-term heavy precipitation in Wuzhou City based on automatic station data

作　　者：孙靖雯 王建东 卢伟萍 谭胜寒 宁晨阳 SUN Jingwen;WANG Jiandong;LU Weiping;TAN Shenghan;NING Chenyang(Wuzhou Meteorological Bureau,Guangxi Wuzhou 543000,China;Laibin Meteorological Bureau,Guangxi Laibin 546100,China;Guangxi Institute of Meteorological Sciences,Nanning 530022,China;Tengxian Meteorological Bureau,Guangxi Tengxian 543300,China)

机构地区：[1]梧州市气象局,广西梧州543000 [2]来宾市气象局,广西来宾546100 [3]广西壮族自治区气象科学研究所,南宁530022 [4]藤县气象局,广西藤县543300

出　　处：《气象研究与应用》2023年第4期108-113,共6页Journal of Meteorological Research and Application

基　　金：中国气象局复盘总结专项(FPZJ2023-097);广西重点研发项目(桂科AB21196041);广西气象科研计划项目(桂气科2023QN12);梧州市科技计划项目(202202048)。

摘　　要：基于2013—2022年梧州市153个加密自动站的逐小时降水资料,分析梧州市短时强降水时空分布特征。结果表明:(1)梧州市短时强降水年发生频次呈现“W”式波动变化,主要出现在3—9月。月际分布总体呈现“双峰”结构特征,主峰出现在5—6月,次峰出现在8月。(2)短时强降水发生频次有明显的日变化特征,高频发时段出现在13:00—20:00。(3)梧州市短时强降水频次前汛期要多于后汛期,且空间分布有较大的差异性,南北多中部少,主要分布在大瑶山、大桂山以及云开大山附近,可能受地形影响有关。Based on the hourly precipitation data from 153 encrypted automatic stations in Wuzhou City from2013 to 2022,the spatial and temporal distribution characteristics of short-term heavy precipitation in Wuzhou City are analyzed.The results show that:(1)The annual frequency of short-duration heavy precipitation in Wuzhou City shows "W"-type fluctuation,mainly in March-September.The inter-monthly distribution is characterized by a "double-peak" structure,with the main peak occurring in May-June and the second peak in August.(2)The frequency of short-term heavy precipitation has obvious diurnal characteristics,with high frequency occurring from 13:00 to 20:00.(3)The frequency of short-term heavy precipitation in Wuzhou City is more frequent in the first flood season than in the second flood season,and the spatial distribution has a greater variability,with more in the south and north and less in the central part of the city,and it is mainly distributed in the vicinity of the Dayaoshan Mountain,Daguishan Mountain,and Yunkai Mountain,which is likely to be affected by the influence of the terrain.

关 键 词：梧州市 短时强降水 地形影响 时空特征 

分 类 号：P412[天文地球—大气科学及气象学]