| 摘要: |
| 针对中尺度地形对我国天气影响的重要性,对REM先后进行水平、垂直分辨率的提高,并运用常规报文资料获得初始场,运用包络地形方法获得模式所需的地形资料,对1994年7月12─13目的大暴雨个例进行了数值试验,结果表明,仅提高REM的水平分辨率,对降水预报有一定的改进和提高,但多报出了几个大暴雨中心。而对模式水平及垂直分辨率均提高后(称此模式为C模式),其降水场、形势场的预报有明显的改进和提高,虚假降水中心消失,C模式的水平、垂直分辨率基本上是协调的。 |
| 关键词: η坐标 模式分辨率 包络地形 数值试验 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金49745007号;空司基础理论课题 |
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| AN IMPROVEMENT ON REGIONAL ETA-COORDINATE MODEL(REM) AND NUMERICAL EXPERIMENT |
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Zhou Zugang1, Zhang Weihuan1, Lin Naishi1, Sun Mingsheng2
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1.The metcorology institute of Air Foroe, Nanjing, 211101;2.The meteorological center of the Northern Air Force
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| Abstract: |
| In order to Study the important influence of the meso-scale topography on Chinese weather,the horizontal and vertical resolutions of REM are increased, and the higher resolution model is used to simulate the heavy raim case of July 12th-13th, 1994, using the routine data to get initial field and model topography by the envelope method. Comparing the results of A, B and C models with obsercvation,it is found that the precipitation and circulation pettern forecast by C model has been improved more than that of A and B models. It is found that meso-scale topography is an important indicator for heavy rain forecast. |
| Key words: Eta-coordinate Model resolution Envelope topography Numerical experiments |
