边界层辐合线触发锦州短时大暴雨分析

利用加密自动站资料、常规观测资料及多普勒雷达资料等，对2012年7月22日锦州东部地区短时大暴雨过程进行了天气尺度和中尺度诊断分析。分析发现锦州东部地区边界层中尺度辐合线的生成和发展，是其降水强度明显增幅的主要原因，是短时暴雨到大暴雨产生的启动机制。边界层辐合线造成水平场上的强烈风场辐合，增加该地区水汽和能量积聚，并触发该地区强烈的上升运动。另外，通过对雷达基本反射率因子图和径向速度图的分析，发现强回波区和逆风区的存在与强降水有着较好的相关，且逆风区提前于强降水出现，对短时临近强降水落区预报有很好的指示意义。

Analysis on the Short-time Rainstorm Triggered by ABL Convergence Line in Jinzhou

Based on the conventionally observational data,meteorological data from automatic weather sta-tions and Doppler radar data and so on,a short rainstorm event on July 22,2012 in The eastern part of Jinzhou was analyzed. The results show that the formation and development of The mesoscale convergence line is The main reason of increase in precipitation intensity, as well as the trigger mechanism for the Short-time Rainstorm on The eastern part of Jinzhou .Furthermore,the heavy rain storm occurres near the center of mesoscale low pressure and accompanies with them.The boundary layer convergence line increase the strong wind Convergence and accumulation about moisture and energy. In addition,through the analy-sis of the radar base reflectivity and radial velocity map,The results show that The heavy rain area has a better corresponding relationship with the adverse wind area and strong radar echo area. in addition the ad-verse wind area appears ahead of the strong precipitation, so the adverse wind area is of indicative for prediction and warning of severe convective weather.