沙漠与绿洲气象Issue(6)：22-29,8.DOI:10.3969/j.issn.1002-0799.2013.06.004
北京一次下击暴流的三维数值模拟分析
Three-Dimensional Numerical Simulation of a Downburst in Beijing
摘要
Abstract
A typical severe convective storm on August 23rd, 2001 in Miyun District, Beijing was firstly simulated via the Weather Research and Forecasting (WRF)model and then the focus was taken on the extraction of a β meso-cale downburst near Miyun reservoir as well as the analysis on its evolution. The results showed as follows. (1)The horizontal and vertical stream structure of the downburst whose life was about 1 hour and horizontal scale was about 20km, was generally consistent with the theoretical structure of downburst while the divergent flow velocity near surface was slower than 18m/s, which did not meet the definition of downburst. (2)The perturbation potential temperature and water mixing ratio were highly interrelated with the instability of stratification profiles and updraft, and their relationship also confirmed that the downburst was primarily produced by rain loading and enhanced by the updraft motion caused by high perturbation potential temperature and the warm and damp mass.关键词
茁中尺度下击暴流/WRF模式/三维数值模拟/北京Key words
β meso-scale downburst/WRF model/three-dimensional numerical simulation/Beijing分类
天文与地球科学引用本文复制引用
李梦婕,申双和,李雨鸿,陶苏林..北京一次下击暴流的三维数值模拟分析[J].沙漠与绿洲气象,2013,(6):22-29,8.基金项目
国家自然基金项目（41271098）；2007年城市气象科学研究基金（UMRF 200703）；江苏省自然科学基金资助项目（BK2006227）；江苏高校优势学科建设工程（PAPD）项目共同资助。 （）
