利用加密探测产品对“06731”北京奥体中心局地暴雨结构特征的精细分析  

FINE ANALYSIS OF A LOCAL HEAVY RAIN EVENT AT BEIJING OLYMPIC SPORTS CENTER BY VARIOUS OBSERVATION DATA

作　　者：郭虎[1] 段丽[1] 卞素芬[1] 崔永义[1] 李靖[1] 

机构地区：[1]北京市气象台,北京100089

出　　处：《热带气象学报》2008年第3期219-227,共9页Journal of Tropical Meteorology

基　　金：北京市财政项目"北京地区主要气象灾害预报系统"资助

摘　　要：利用2006年吊装完成投入业务运行的北京南郊S波段新一代Doppler雷达探测产品及北京地区自动站地面测风和雷达风廓线等每6min一次的多设备加密探测资料,对2006年7月31日上午发生在奥林匹克公园(奥体中心)附近的局地暴雨进行精细分析。结果表明,发生在奥林匹克公园附近,尺度15km左右,时间2h的局地暴雨是一次典型的雷暴单体影响过程。造成暴雨落区的雷暴单体源自北京西郊的地形回波带。这个地形回波带由多个中γ尺度中气旋回波块构成。研究表明,这些中气旋回波块的生成首先从近地面开始。中气旋回波块与雷暴单体的发展与近地面辐合,激发边界层扰动的动力过程分不开。Radar-measured products from a S-band Doppler weather radar in southern Beijing, which was installed and put into operation in 2006, are used to analyze the isolated torrential rain which occurred in the morning on July 7, 2006 around the Olympic Green （the Olympic Sports Center）. They include the element of wind from surface automatic weather stations and automatically detected data by wind profilers and are available every 6 minutes. The result shows that the local heavy rain event with a spatial scale of about 15 km and the temporal scale of 2 hours is a typical example influenced by a thunderstorm cell. The cell causing the heavy rainfall emerges in the topographic echo belt from Mentougou through Shijingshan to Haidian area. The echo belt is composed of several meso- γ-scale mesocyclone echo cells. The research shows that the mesocyclone echo cells generate in the surface layer and it is all related with the development of thunderstorm cells, convergence of surface layer, and dynamic processes bringing about boundary layer disturbance.

关 键 词：局地暴雨 雷达探测 精细分析 

分 类 号：P458.121.1[天文地球—大气科学及气象学] TG115.52[金属学及工艺—物理冶金]