| 包络地形和重力波拖曳对区域气候模拟效果的影响 |
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| 引用本文： | 刘华强,钱永甫.包络地形和重力波拖曳对区域气候模拟效果的影响[J].大气科学,2001,25(2):209-220. |
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| 作者姓名： | 刘华强 钱永甫 |
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| 作者单位： | 1.南京大学大气科学系,南京 210093;南京气象学院气象灾害与环境变化开放实验室,南京 210044 |
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| 基金项目： | 国家“九五”攻关项目96-908-02-04-04和国家自然科学基金资助项目49735170共同资助 |
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| 摘 要： | 用NCAR区域气候模式(RegCM2)的数值试验，研究了包络地形和地形重力波拖曳作用对1991年5、6月份中国区域内气候模拟效果的影响。通过试验结果的对比分析发现，在模式中引入地形重力波拖曳作用可在一定程度上改善模式对气候系统和要素的模拟效果，使模拟结果更符合气候实况。包络地形对模拟结果也有一定的改善，但对于细网格的区域气候模式(RCM)来说，其效果不如重力波拖曳明显。不论是地形重力波拖曳还是包络地形，在模式积分的初期，它们的作用并不明显，随着积分时间的增长，它们对模拟结果的影响程度增大。
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| 关 键 词： | 区域气候模拟 包络地形 地形重力波拖曳 |
Effects of Envelope Orography and Gravity Wave Drag Parameterization on Regional Climate Simulations |
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| Liu Huaqiang and Qian Yongfu.Effects of Envelope Orography and Gravity Wave Drag Parameterization on Regional Climate Simulations[J].Chinese Journal of Atmospheric Sciences,2001,25(2):209-220. |
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| Authors: | Liu Huaqiang and Qian Yongfu |
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| Abstract: | The regional climate model (RegCM2) of NCAR is used to study the effects of envelope orography and gravity wave drag on the regional climate in China during May and June of 1991. Analysis and comparison of the model results show that the introducing of gravity wave drag to the model can improve the model performance to some extent and result in more realistic simulation, and the effect of envelope orography on regional climate simulation is less significant than that of gravity wave drag. The results also show that both gravity wave drag and envelope orography have smaller influence on model results in the beginning of simulation, but greater in the later stage. |
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| Keywords: | regional climate simulation envelope orography gravity wave drag |
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