气象2017，Vol.43Issue(7)：769-780,12.DOI:10.7519/j.issn.1000-0526.2017.07.001
华南雷暴大风天气的环境条件分布特征
Environmental Characteristics of Severe Convective Wind over South China
摘要
Abstract
The spatial distributions of severe convective wind (SCW) and nonsevere thunderstorms (NT) over South China,occurring between 08:00 BT and 20:00 BT during spring and summer in 2010-2014,were analyzed by using the observational data from China Meteorological Administration.And then,their environmental characteristics were compared between SCW and NT in spring and summer.It was found that SCW in summer is more frequently than that in spring and that NT in summer is about 3.6 times the counts of NT in spring.SCW events mainly concentrate in the western Guangdong to the Pearl River Delta Region.Compared to NT,SCW is generally associated with stronger baroclinity,instability and stronger dynamic forcing.The precipitable water and averaged relative humidity between 700-500 hPa of SCW tend to be higher than those of NT in spring,while the opposite is the case for the pattern in summer.In conclusion,it is obvious that the dynamic forcing for SCW in spring is much better than these in summer,while the thermal condition is more significant in summer.关键词
中尺度对流系统/雷暴大风/环境条件/雷暴Key words
mesoscale convective system (MCS)/severe convective wind/convective environmental condition/thunderstorm分类
天文与地球科学引用本文复制引用
杨新林,孙建华,鲁蓉,张弦..华南雷暴大风天气的环境条件分布特征[J].气象,2017,43(7):769-780,12.基金项目
公益性行业(气象)科研专项(GYHY201406002)和国家自然科学基金项目(41675045)共同资助 （气象）
