利用天气图资料、物理量场、卫星云图、雷达回波等气象资料,对2010年7月19日安阳区域一次典型暴雨天气过程进行分析,进而对我市区域性暴雨天气过程的特征进行总结,得出以下结论:①造成此次区域性暴雨的主要影响系统是西太平洋副热带高压及其西北侧的西风带低槽和西南低涡,属于典型的北槽南涡型暴雨天气类型.低槽引导西南低涡东北上,槽后明显的冷空气与西南低涡东北上、副高外围边缘的西南暖湿气流交汇,共同影响造成了安阳这次区域性暴雨过程.②较强降水并不是产生在Tbb低值中心处,而是产生在其附近的等值线密集带内,这是由于Tbb最低时,云顶最高,此时往往是云体发展最旺盛的阶段,并不是降水最强的时候,只有在云顶逐渐下降时,降水才能达到最强.③从雷达回波上看降水回波大体上是从西南往东北移动的,回波强度最大为48dBz.%By using of weather maps material, physical fields, such as satellite image, radar meteorology, for July 19th 2010 at Anyang region a typical rainstorm weather process analysis, then for zhuhai's regional rainstorm weather process features summarized can reach the following conclusion: ①By the regional the main influence system is heavy and west of the western Pacific subtropical high of wetting weakeed low slots and southwest vortex. Low groove guide,southwest vortex northeast, trough the cold air and the apparent northeast and southwest vortex of subtropical high level warm-moist air southwest edge of outer common effect convergence, caused anyang re-emergence heavy rain process. ②Strong and not produce precipitation in Ty, valuable center point, but in the nearby produced with dense, within the isoline. This is due to lowest, Tbb, genting supreme, right now is often the most exuberant cloud body development stage,and not only the strongest,precipitation in genting gradually declined, the precipitation to reach the strongest. ③Look from radar rainfall from southwest to northeast echo generally moving, echo intensity 48 dBz maximum.
展开▼
