海洋预报2025，Vol.42Issue(5)：108-119,12.DOI:10.11737/j.issn.1003-0239.2025.05.011
广东近海雷暴大风日统计特征及物理量参数分析
Analysis of statistical characteristics and physical parameters of thunderstorm gale days in coastal Guangdong
摘要
Abstract
Utilizing multi-source observational data from Guangdong's islands,platforms,buoy stations,and coastal automatic stations,combined with radar,lightning information,and the ERA5 reanalysis datasets,this study conducts a comprehensive statistical analysis of thunderstorm gales in the coastal areas of Guangdong during the flood seasons from 2021 to 2024.The key findings are as follows:In the coastal areas of Guangdong,thunderstorm gale days are frequently accompanied by whole gale,with daily peak commonly observed in the central offshore regions.The monthly distribution of thunderstorm gale days exhibits a bimodal pattern,with a primary peak in June followed by a secondary peak in August.Maximum wind speeds predominantly occur during daytime hours.The circulation patterns associated with thunderstorm gales can be classified into four distinct types:pre-trough,post-trough,easterly,and high-pressure.Among these,the pre-trough type is the most prevalent,characterized by a strong dynamic forcing mechanism.In contrast,the post-trough type exhibits the highest level of atmospheric instability and maximum vertical wind shear,making it particularly conducive to extreme convective winds.The high-pressure type is marked by significant thermal forcing and distinct"dry upper-layer and wet lower-layer"structure,whereas the easterly type generally presents less favorable conditions across various physical parameters.Squall lines and banded echoes are more likely to occur in the pre-trough and post-trough patterns,while scattered echo patterns are typically associated with the high-pressure and easterly systems.Atypical echoes are primarily linked to the high-pressure pattern.Detailed case analyses demonstrate distinct evolutionary characteristics in radar reflectivity patterns throughout the initial,development,and mature stages of thunderstorms.关键词
广东海区/雷暴大风/物理量参数/天气型/雷达回波特征Key words
the coastal area of Guangdong/thunderstorm gale/physical parameters/weather patterns/radar echo characteristics分类
大气科学引用本文复制引用
刘嘉劲,郭春迓,张如清,朱文生,莫锦博..广东近海雷暴大风日统计特征及物理量参数分析[J].海洋预报,2025,42(5):108-119,12.基金项目
广东省基础与应用基础研究基金(2024A1515510037) （2024A1515510037）
广东省气象局重点项目(GRMC2023Z01) （GRMC2023Z01）
国家重点研发计划(2023YFC-3008005). （2023YFC-3008005）
