2011年8月28～29日本溪暴雨天气雷达回波特征分析

摘要

Based on the conventional meteorological data, satellite images and Doppler radar products of Yingkou station, the heavy rainfall during August 28 and 29, 2011 in Benxi was comprehensively analyzed. Results showed that this heavy rain was caused by the westerly trox, the shear line in lower layer and the strong warm-wet air of subtropical high edge. The basic reflectivity images indicated that there was a strong echo center with the intensity of 45 -55 dBz existing in the mixed precipitation clouds. The "train effect" of the convective cloud cluster was beneficial to heavy rainfall. The Doppler velocity images showed that this heavy rainfall was primarily characterized by low-level jet and adverse wind area.%利用常规资料、卫星云图和营口多普勒雷达产品,对2011年8月28～29日发生在本溪地区的暴雨天气过程进行综合分析.结果表明,西风带低槽、低层切变线和副热带高压边缘强盛的暖湿气流共同影响造成了这次暴雨天气过程；在基本反射率图上,在混合性降水云系中存在强度为45～55 dBz的强回波中心,对流云团出现“列车效应”时有利于暴雨天气的发生；在多普勒速度图上,低空急流和逆风区是这次暴雨的重要特征.