| MM5模式对区域气候模拟的性能试验 |
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| 引用本文： | 刘栋.MM5模式对区域气候模拟的性能试验[J].高原气象,2003,22(1):71-77. |
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| 作者姓名： | 刘栋 |
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| 作者单位： | 中国科学院,寒区旱区环境与工程研究所,甘肃,兰州,730000 |
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| 基金项目： | 国家自然科学基金项目“区域性短期气候过程的非线性预测理论和方法研究”( 4 0 0 35 0 10 )资助 |
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| 摘 要： | 利用1998年6月NCEP资料和6月2日00：00地表资料及美国NCAR／PENN州的MM5对1998年6月我国南方降雨过程进行了气候模拟的性能试验，模拟结果表明，MM5基本上可模拟出局地大气环流和区域尺度上的强对流过程造成的雨区，降雨强度和强降水中心位置，但模拟的雨量与实际值相差较大，模拟值再现了我国夏季降水异常的空间分布特点，模式可向区域气候模式发展，但该模式模拟的1998年6月副高强度比其实际值的强度更强，故导致更多的水汽进入降雨区，造成过多的降雨。
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| 关 键 词： | MM5模式 区域气候模拟 中国 降水过程 数值试验 温度 相对湿度 |
| 文章编号： | 1000-0534(2003)01-0071-08 |
| 修稿时间： | 2002年1月23日 |
Performance Verification of Mesoscale Model MM5V3 to Regional Climate Simulation |
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| LIU Dong.Performance Verification of Mesoscale Model MM5V3 to Regional Climate Simulation[J].Plateau Meteorology,2003,22(1):71-77. |
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| Authors: | LIU Dong |
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| Abstract: | The regional climate model second generation (RegCM2) is a research tool aimed at enhancing the modeling ability to identify regional scale anomalous climate variations. RegCM2 was developed on the base of Mesoscale Model Version 4(MM4), its dynamical component is hydrostatic, so its simulation has the big bias in the rainstorm simulation resulting from strong convection. The rainstorm has resulted in the flood in South China in June, July and August 1998. Thus, this simulation provides an excellent case study for evaluating the model's ability to reproduce the features of anomalous precipitation at the regional scale. An important conclusion from strong rainfall simulation in June 1998 is that, MM5V3 is capable of reproducing the feature of local planetary atmospheric circulation and regional scale rain area resulting from strong convection, the position and intensity of strong rainfall centers. But simulated precipitation quantity is different with real precipitation quantity. So MM5V3 may be developed to be regional numerical prediction model system. The simulation reproduces the feature of anomalous precipitation in South China during June of 1998. This simulation has stronger intensity of two planetary-scale monsoon systems than their actual one, as a result, much more amount water vapor came into rain area and overestimation of rainfall amount. |
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| Keywords: | MM5 Precipitation of South China Regional climate simulation |
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