气象与环境学报2013，Vol.29Issue(1)：1-11,11.DOI:10.3969/j.issn.1673-503X.2013.01.001
一次暴雨过程数值模拟与诊断分析
Numerical simulation and diagnostic analysis of a rainstorm process
摘要
Abstract
Based on the NCEP/NCAR reanalysis data with the resolution of 1° × 1° and the observational precipitation as well as the 3 h interval TRMM precipitation data,a heavy rain process on July 22,2010 in the south of the middle of the Yellow River was analyzed using a mesoscale Weather Research and Forecasting model(WRF). The results indicate that this rainstorm is simulated successfully by the WRF model. This rainstorm is generated together by a subtropical high over the West Pacific and a low trough in the Hetao area under a situation of large scale circulation. The abundant water vapor source is from the Indian Ocean and the Southern China Sea. The mesoscale gravity wave is excited by the upper level jet stream on 200 hPa. According to the divergence field and cloud water distribution,the existence and moving direction of the mesoscale gravity wave could be determined. The reasons that effect of gravity wave on rainstorm generation in the east area of Gansu province are analyzed based on the simulation data. It shows that the mesoscale gravity wave in upper level jet and its absorption in lower atmosphere cause the formation of the rainstorm. According to the wind direction in upper jet and values distributions of the nonlinear balance equation(NBE) ,the area and moving direction of the mesoscale gravity wave could be determined in advance, so the falling area and time of rainstorm could be forecasted.关键词
TRMM/暴雨/数值模拟/重力波Key words
Tropical rainfall measuring mission (TRMM)/ Rainstorm/ Numerical simulation/ Gravity wave分类
天文与地球科学引用本文复制引用
王文,程攀..一次暴雨过程数值模拟与诊断分析[J].气象与环境学报,2013,29(1):1-11,11.基金项目
公益性行业(气象)科研专项(GYHY201006038)和江苏省高校优势学科建设工程项目共同资助. （气象）
