沙漠与绿洲气象Issue(4)：31-37,7.DOI:10.3969/j.issn.1002-0799.2013.04.006
一次高空槽与西南涡耦合影响下的华北暴雨过程分析
Diagnostic Analysis of a Torrential Rainstorm Process on Coupling Interaction between Southwestern Vortex and Upper Trough in North China
摘要
Abstract
Due to the effect of the southwestern low vortex, a heavy precipitation in North China during 18 to 20 July 2010 occurred. Using NCEP/NCAR reanalysis data, the physical mechanism of the heavy rainstorm processes are diagnostically analyzed. The main conclusions are as follows. The rainstorm process is mainly affected by southwestern low vortex, the coupling interaction between mid-latitude upper trough and southwestern vortex leads to the development of the rainstorm. The low-rise was caused by the interaction between upper and lower jets, and the downward spread of moist potential vorticity is also of an advantage to the development of the southwest vortex; The positive vorticity and the center of divergence lead to the low-level moisture convergence for the rainstorm. The high energy and high humidity in middle and low level air provides energy and water vapor, which is very important to strengthen the southwestern vortex and keep the rainstorm continuously.关键词
高空槽/西南低涡/物理机制Key words
upper trough/southwestern low vortex/physical mechanism分类
天文与地球科学引用本文复制引用
买文明,何丽华,田秀霞,梁如意..一次高空槽与西南涡耦合影响下的华北暴雨过程分析[J].沙漠与绿洲气象,2013,(4):31-37,7.基金项目
公益性行业（气象）专项“东北、华北暴雨发生发展特点及预报技术研究”（GYHY200906011）共同资助。 （）
