摘要
通过比较常用地形σ坐标的流体静力中尺度大气控制方程的一般导出与利用张量分析法的导出，分析了前者只限用于很小地形坡度的原因。根据后者对前者作了修正，给出适用于较陡地形坡度的流体静力控制方程。并借助修正了的Ｐｉｅｌｋｅ数值模式模拟气流过山的流场特征，说明修正的作用与意义。
The equations in terrain following coordinate system with hydrostatic hypothesis deduced by using a general method are compared with the equations deduced by using tensor analysis method. The reason why the former equations only fit very flat terrain is analyzed, and an amendment is added based on the latter equations. Furthermore, several cases about flow climbing over mountains are numerically simulated and the results show some obviously active effects attributed to the amendment.
基金
国家"九五"科技攻关专题
山东省自然科学基金
关键词
地形坐标
张量分析法
陡峭地形
中尺度
大气
terrain following coordinate system
tensor analysis method
steeper terrain
nonhydrostatic effect of terrain.
