用双多普勒天气雷达资料研究暴雨三维风场结构  

Study on three-dimensional wind fields of a heavy rainfall in Guangdong by dual-Doppler radar

作　　者：周海光[1] 

机构地区：[1]中国气象科学研究院灾害天气国家重点实验室,北京100081

出　　处：《气象科学》2008年第6期630-636,共7页Journal of the Meteorological Sciences

基　　金：科技部国家重点基础发展规划项目(2004CB418305);国家自然科学基金(40605014);科技部科研院所社会公益研究专项(2002DIA20013);灾害天气国家重点实验室基本科研项目(2008LASWZI01)

摘　　要：使用双多普勒天气雷达三维风场反演技术对2005年6月11—12日梅州和汕头多普勒天气雷达探测到的华南暴雨资料进行了三维风场反演,对暴雨系统的中尺度三维动力结构进行了详细分析。结果表明:此次暴雨主要是由中低层的中β尺度辐合线、中β尺度切变线和嵌于其中的中γ尺度涡旋共同作用引发的。低层辐合、高层辐散的动力结构,有利于暴雨系统的触发、维持和发展。最后,综合分析结果给出了此次暴雨的三维动力结构模型。The three-dimensional wind of the heavy rain on June 12,2005 were retrieved and analyzed by the Dual-Doppler radar volume scan data in Meizhou and Shantou city. The result shows that the heavy rainfall were caused by meso-β-scale convergence line, meso-βscale shear line and meso-γ-scale vortex mixed in the meso-βscale shear line at the low and middle level. The strong convergence at the low level and the divergence at the upper level played important role in this heavy rainfall. The three-dimensional kinematic structure model of this heavy rainfall was also given.

关 键 词：华南暴雨 三维风场 双多普勒雷达 风场反演 

分 类 号：P458[天文地球—大气科学及气象学]