中文摘要：

利用雷达、卫星、闪电定位、探空等资料,对长江三角洲地区2004—2013年的雷暴天气个例进行统计分析,得到该地区雷暴天气的时空分布特征,同时从天气学角度将这些雷暴天气个例大体划分为五种类型：槽前型、副高边缘型、冷涡（槽后）型、副高热对流型、东风波型（包括台风外围影响）,并给出其典型中尺度分析综合图。通过对雷暴天气发生前后气层中的K、Si、CAPE、Pwv等物理量的变化情况进行统计分析,发现多数雷暴天气发生前均伴随较高的层结不稳定度,即高K指数、低Si指数、高CAPE值和高Pwv值,且6—9月雷暴发生前长三角地区大气不稳定层结明显强于10月至次年5月。

英文摘要：

Using radar, satellite, lightning positioning and sounding data, the cases of thunderstorm weather occurred in the Yangtze River Delta Region during the years 2004 to 2013 were statistically analyzed, and the temporal and spatial distribution characteristics of thunder- storm weather in this area were studied. In the study, these thunderstorm cases were divided into five types： in front of trough, subtropical high edge, behind trough, thermal convection under subtropical high and easterly wave. Also, the typical mesoscale analysis maps were giv- en to each of the above five types of thunderstorm weather. Finally, variation of the K index, Si index, CAPE and _Pwv values before and af- ter the occurrence of these thunderstorm systems were discussed. It was found that before the occurrence of thunderstorm, most cases had strong layer stratification instability, that indicates high K index value, low N index value, high CAPE and high Pwv value. Additionally, the layer stratification instability before the occurrence of thunderstorm was much stronger from June to September than from October to May in the Yangtze River Delta Region.