海洋气象学报2025，Vol.45Issue(5)：124-131,8.DOI:10.19513/j.cnki.hyqxxb.20240519001
基于小时观测资料的江门地区降水分布特征
Distribution characteristics of precipitation in Jiangmen based on hourly observations
摘要
Abstract
Based on the hourly precipitation data from 6 national surface meteorological observing stations and 122 regional meteorological observing stations in Jiangmen from 2010 to 2021,the spatial and temporal distribution characteristics of precipitation events with different durations during the flood season in Jiangmen are analyzed.The results are as follows.(1)The annual average precipitation in Jiangmen is higher in the south than in the north,with a stronger annual average precipitation intensity in the south.The annual average precipitation hours are high in the west.The distribution of monthly average precipitation exhibits a double peak pattern,with the highest precipitation occurring in August,the second peak in May,and the least precipitation in December.(2)Short-duration precipitation events are the most frequent during the flood season,while long-duration events contribute the most to the total precipitation.(3)During the early flood season,the short-and medium-duration precipitation predominantly affects the northern region,whereas the long-duration precipitation primarily affects the southwestern and coastal areas.During the latter flood season,there is little variation in the frequency of long-duration precipitation,but the contribution of precipitation from the southern region is greater.(4)Spatially,nearly 40％of the stations record peak daily average precipitation from morning to noon both in the early and latter flood seasons.During the early flood season,the northwestern region exhibits stronger convection from afternoon to evening,while the southeastern region experiences more intense convection during the latter part of the night,and the average precipitation intensity is large from morning to nightfall.In the latter flood season,the nocturnal precipitation becomes more pronounced than in the early season,with strong average precipitation intensity from midnight to morning.关键词
江门/不同历时降水/分布特征Key words
Jiangmen/precipitation with different durations/distribution characteristics分类
大气科学引用本文复制引用
余恺欣,蒲义良,曾一杰,陈铃茵,徐浩彬,黄顺帮..基于小时观测资料的江门地区降水分布特征[J].海洋气象学报,2025,45(5):124-131,8.基金项目
粤港澳大湾区气象科技协同攻关项目(GHMA2024Z06) （GHMA2024Z06）
江门市气象局科学技术研究项目(202101,201907,202004) （202101,201907,202004）
广东省气象局科学技术研究项目(GRMC2024Q23,GRMC2024Q11) （GRMC2024Q23,GRMC2024Q11）
应急风险分析与应急能力建设研究(2024年)(粤财预[2024]4号)子项目六(006) （2024年）
