浙北地区一次强对流天气过程分析

利用MICAPS系统T213资料和实况资料，结合雷达回波和卫星云图，对2002年7月16日发生在浙北地区的强对流天气过程的大尺度环流背景和物理量场进行分析发现：前期大陆副高南侧的来自西太平洋的偏东气流为强雷暴区提供了充沛的水汽和能量；江南地区在高空暖中心控制下，出现了大范围高温天气，形成高温、高湿的大气层；北方冷锋和阶梯槽携带冷空气南下冲击副高西北侧(浙北地区)的不稳定层结，使对流强烈发展起来，触发了不稳定能量的释放，为强雷暴的发生提供了动力抬升条件。

Analysis of a Strong Convective Weather Processin the North of Zhejiang Province

A severe thunderstorm occurred in the north of Zhejiang Province, during the afternoon of July 16 2002. By using of the conventional data and physical data provided by T213 in MICAPS,combined with radar data and satellite cloud image, an analysis of large scale atmospheric circulation and corresponding physical fields associated with this event is made. The results show that the easterly wind in the south side of subtropical high provided plenty of water vapor and energy. In the south of Changjiang River controlled by warm center, it appears high temperature in large range, an atmospheric layer with high temperature and high humidity was formed. In the north cold front and tilted trough, carrying cold air with them, stricked the unstable atmospheric stratification in the northwest of subtropical high, which generated strong convection, triggered the release of unstable energy and provide dynamic lifting for severe thunderstorm.