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中文摘要: 本文详细地讨论了σ坐标模式引入地形时气压梯度力的截断误差。通过理论分析和数值计算看到,对于不同的σ定义和模式变量的垂直分布,Corby格式的精度可以有很大差别。为了减小梯度力的计算误差,对于模式的垂直离散化和梯度力的差分格式提出了一些改进意见。
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Abstract:A detail examination of the truncation errors of the pressure gradient force is shown in a coordinate system when orography was introduced into the numerical weather prediction model. By means of theoretical analysis and numerical calculation, it was found that the accuracys of Corby scheme are differed greatly for different definitions of σ and vertical distributions of variables of the model. In order to suppress the errors, some suggestions about vertical discretization of the model and finite difference formulation of pressure gradient force are given.
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引用文本：
张玉玲,吴兴仁,1987.地形坐标系数值模式中气压梯度力的计算[J].气象,13(10):18-23.
,1987.Evaluation of pressure gradient force in coordinate system following the terrains[J].Meteor Mon,13(10):18-23.
张玉玲,吴兴仁,1987.地形坐标系数值模式中气压梯度力的计算[J].气象,13(10):18-23.
,1987.Evaluation of pressure gradient force in coordinate system following the terrains[J].Meteor Mon,13(10):18-23.