气象2012，Vol.38Issue(10)：1207-1216,10.
1971-2000年我国东部地区雷暴、冰雹、雷暴大风发生频率的变化
Analysis of Frequency Variation of Thunderstorm, Hail and Gale Wind in Eastern China from 1971 to 2000
摘要
Abstract
Abstract: Based on the meteorological data collected from 1084 stations over North China, Central China and East China from 1971 to 2000, features of interdecadal variation of thunderstorm, hail and gale wind in the south of the Yangtze River (31°N southward), Jiang-Huai area and Huang-Huai (31°N to 37°N) and the north of the Yellow River (37°N northward) have been analyzed. The analysis results have indicated that the frequency of thunderstorm, hail and gale wind has a decreasing trend. The inter-decadal variation of thunderstorm in the south of the Yangtze River shows a more significant decreasing trend, hail decreases most obviously in the north of the Yellow River, and gale wind decreases evidently in all these three regions. The hail often occurs with gale wind, and more frequent in the plateau and the mountain region than in the plain. It takes place most in northern North China and Central Inner Mongolia. The analysis of relevant conditions for the generation and development of the mesoscale convective system such as water vapor, thermodynamic instability and dynamical lifting has shown that the reduction of convection weather has a close relation to the decline of moisture and dynamic conditions. (severe weather threat) including thermodynamic, dynamic and moisture characteristics to the convection weather in the spatial distribution or the The composite index SWEAT conditions expresses the similar evolution trend in 30 years.关键词
对流天气/年代际变化/成因分析/SWEAT指数Key words
convection weather/inter-decadal change/causation analysis/SWEAT index (severe weatherthreat index)分类
天文与地球科学引用本文复制引用
余蓉,张小玲,李国平,高倩..1971-2000年我国东部地区雷暴、冰雹、雷暴大风发生频率的变化[J].气象,2012,38(10):1207-1216,10.基金项目
公益性行业（气象）科研专项（GYHY200906003）资助 致谢：感谢国家气象信息中心阮新为本文提供资料,感谢国家气象中心郑永光博士对本文的指导. （）
