气象科学2012，Vol.32Issue(2)：194-201,8.DOI:10.3969/2012jms.0016
“0907”长江下游梅雨锋暴雨的数值模拟和诊断分析
Numerical simulation and diagnostic analysis of Meiyu front heavy rain over the lower Yangtze River in July of 2009
摘要
Abstract
Based on routine, satellite and objective reanalysis data, a Meiyu front heavy rain occurred over the lower Yangtze River from 6 to 7 July 2009 was simulated and analyzed. The occurrence and development mechanism were emphasized. It was found that a sub-synoptic-scale vortex was on the north aide of the lower Yangtze River at low level of troposphere. Its development and eastward movement intensified front and caused the occurrence of low-level jet at lower level. The simulation result provided by WRF meso-scale numerical model shows that several meso-β-scale systems and meso-γ-scale systems continued to form on the south side of sub-synoptic-scale vortex. This paper analyzed one of several meso-β-scale systems. It shows that meso-scale low-level jet and meso-scale convergence first occurred. And then meso-scale convergence enhanced rapidly. The coupling of intense divergence at upper levels,f meso-scale jet at lower levels and meso-scale vortex let the system develop and eastward move continuously. The relatively dry and cold air in the upper troposphere entered the system, which caused the system to be weakened.关键词
梅雨锋暴雨/WRF模式/中尺度对流系统Key words
Meiyu front rainstorm/ WRF model/ Meso-scale convective system分类
天文与地球科学引用本文复制引用
赵娴婷,苗春生,于波..“0907”长江下游梅雨锋暴雨的数值模拟和诊断分析[J].气象科学,2012,32(2):194-201,8.基金项目
国家科技支撑计划课题(2007BAC29B06) （2007BAC29B06）
