江西区域强对流气候特点及云型分析

Climatic characteristics of regional severe convection and cloud patterns analysis in Jiangxi Province

本文统计分析了江西区域强对流的气候特征,并对1998年以来20站次以上的区域强对流天气的卫星云图进行了分类,结果表明:江西区域强对流天气以雷雨大风、强降水为主,冰雹出现概率较低;其强对流天气有明显日变化;强对流出现最频繁的地区是在江西中部和东部以及西部地区;强对流的云型主要分为7种:副高边缘型、槽底线对流型、云团发展型、系统前部暖区型、斜压叶云系移动型、飑线、低槽云系内对流发展型,而且以低槽云系内对流发展型居多。

The climatic characteristics of regional severe convection in Jiangxi Province were analyzed in this paper, and satellite cloud images above 20 stations of regional severe convection weather since 1998 were classified. The results show that the Jiangxi regional severe convection weather is mainly based on thunderstorm, heavy wind and strong precipitation with small possibility of the hail. And there are obvious diurnal variations of regional severe convection weather. The most occurrence districts are located in the central, eastern and western of Jiangxi Province. Cloud patterns of regional severe convection weather can be classified into the following 7 types： subtropical high edge, convection current at bottom of trough, cloud cluster developing, warming ahead of system, baroclinic cloud system moving, squall line, convection developing within low trough cloud. Among these types, the last type is the most.