( 2 ) increasing of wind is mainly induced by shf and affecting of lhf is very little . ( 3 ) effect of terrain increases ground rough and tonsure of terrain press and fiction correspond enhance frictional damp effect ( 3 )地形作用相当于增加了地面粗糙度，地形压力梯度项与摩擦项地叠加，相当于使摩擦阻尼作用增大，地形强迫作用使下边界层从上至下风速减小，风向向左偏转。
