98.7湖北特大暴雨的天气分析与降水模拟  

Numerical Simulation for the “98.7” anomalous Heavy Rainfall in Wuhan City

作　　者：齐艳军[1] 程明虎[1] 仪清菊[1] 

机构地区：[1]中国气象科学研究院,北京100081

出　　处：《气象》2004年第3期12-16,共5页Meteorological Monthly

基　　金：国家重点基础研究项目--我国重大气候和天气灾害的形成机理和预测理论研究资助

摘　　要：1998年 7月 2 0～ 2 3日 ,湖北省南部发生了一次持续性特大暴雨过程 ,采用双向嵌套的非静力中尺度数值模式 (MM5)对这次强暴雨过程进行初步模拟试验。结果表明 ,粗、细网格均能较好地模拟出雨带的走向和变动以及武汉地区的暴雨中心 ,尤其是嵌套域 (细网格 )模拟的降水强度比粗网格有明显改进 ,和实际观测结果更接近 ;另外 ,对引发这次特大暴雨的对流层低层的中尺度系统也能够很好地模拟出来。A sustained anomalous heavy rainfall event occurred over southern Hubei Province during 20—22 July 1998. A two-way nested nonhydrostatic mesoscale numerical model called MM5 was conducted to simulate the event. The simulative results show that the rain-band distribution with its center is basically consistent with that of the observation, especially for the results derived from the fine nested simulation that are very closely with the observations. In addition, the mesoscale system connecting with the heavy rainfall occurred in 20—22 July is simulated successfully.

关 键 词：暴雨过程分析 降水模拟 非静力MM5 数值模拟 天气分析 湖北 

分 类 号：P458.121.1[天文地球—大气科学及气象学]