赤峰地区“7·23”暴雨天气形成条件及对应云系特征

文章选取了赤峰市地区发生在2009年7月23日午后暴雨天气过程（简称＂7·23＂暴雨天气）的卫星云图资料,并结合天气图和自动雨量站降水资料进行对比分析。结果发现：引发＂·23＂暴雨天气不仅与东北冷涡环流、暴雨落区附近低层暖湿切变风场有关,而且在卫星云图显示的对流云体上有相应云系特征。暴雨发生即与当时大的环流云场相关联,也与降水强度、落区的云场中的一些特殊云形云系存在一定内在关系。分析研究这些天气条件和云图特征信息对做好大暴雨预报服务有着重要意义。

Formation Condition and Corresponding Cloud System of "7.23" Torrential Rain Weather in Chifeng District

Based on the satellite cloud picture data of torrential rain synoptic process in the afternoon of July 23, 2009 in Chifeng district, and comparatively analyzed synoptic chart and automatic precipitation station data, the results showed that ＂7.23＂torrential rain weather not only was related to northeast cold vortex circulation and wind field of low-level warm and wet shear near by torrential rain falling area, but also showed corresponding cloud system characteristics in convective cloud of satellite cloud picture. The torrential rain occurrence not only was related to circulation cloud system, but also had internal relation with precipitation intensity and special cloud pattern and cloud system in cloud field of falling area. Analyzing and researching these synoptic conditions and cloud picture characteristics information has an important significance in torrential rain forecast serve.