热带气象学报2025，Vol.41Issue(2)：211-223,13.DOI:10.16032/j.issn.1004-4965.2025.019
近10年广东汛期不同类型的暖区暴雨发生环境场特征分析
Analysis of the Environmental Parameters of Warm-sector Heavy Rainfall in Different Types in Guangdong Province During Rainy Season in Recent 10 Years
摘要
Abstract
Based on the rainfall data of Guangdong National basic meteorological Stations,regional automatic stations and NCEP FNL reanalysis data,73 typical warm-sector heavy rainfall cases in Guangdong during 2013-2022 were divided into four types according to circulation characteristics.They are shear line,low vortex,southerly wind,and backflow types.The characteristics of spatiotemporal distribution and physical quantities representing atmospheric static instability,energy,water vapor and dynamic conditions were analyzed statistically.The main results are as follows:(1)The southerly wind type has the highest frequency,and the backflow type has the lowest frequency.67％of the warm-sector heavy rainfalls occur during May-June,with 95％of the peak precipitation time occurring in the early morning and daytime.The southerly wind type shows the most distinct variation,with 72％of cases occurring from 05:00 to 08:00 in the morning and 12:00 to 17:00 in the afternoon.(2)The spatial distribution of warm-sector heavy rainfall shows significant differences among different types.The center of the backflow type warm-sector heavy rainfall is located on the western side of the Pearl River Estuary,which differs from the other three types with two main precipitation zones.(3)The key environmental parameters different types of warm-sector heavy rainfall indicate that none of the types require strong conditional instability,and the temperature difference threshold between 500 hPa and 850 hPa is only about 22 ℃.All of them need abundant water vapor,with the precipitable water threshold for the backflow type being the lowest(50 mm).Significant differences exist in energy and dynamic condition thresholds among 4 types.The backflow type requires weaker energy conditions and lower-tropospheric wind speeds,but stronger vertical wind shear from surface to 6 km.关键词
暖区暴雨/时空分布特征/环境参量/预警指标阈值/广东Key words
warm-sector heavy rainfall/spatiotemporal distribution/environmental parameters/warning threshold/Guangdong Province分类
大气科学引用本文复制引用
王蕊,江崟,李超,陈训来,王明洁,王德立..近10年广东汛期不同类型的暖区暴雨发生环境场特征分析[J].热带气象学报,2025,41(2):211-223,13.基金项目
广东省气象局科研项目(GRMC2021Q11) （GRMC2021Q11）
广东省气象局科技创新团队项目(GRMCTD202104) （GRMCTD202104）
中国气象局预报员专项(CMAYBY2017-052) （CMAYBY2017-052）
中国气象局创新发展专项(CXFZ2022J002) （CXFZ2022J002）
深圳市深港澳科技计划项目(C类)(SGDX20210823103537035) （C类）
深圳市基础研究专项重点项目(JCYJ20200109113014456、JCYJ20210324120208022)共同资助 （JCYJ20200109113014456、JCYJ20210324120208022）
