An intense upward motion ahead of the SCF may produced by the boundary layer friction that can be inflated in the upward side and reduced in the leeward side.

• 由于边界层摩擦的辐合作用,在地面冷锋的前缘可形成一支范围较窄、强度较大的上升运动带,当冷锋位于迎风坡时,其强度增强,当冷锋位于背风坡时,其强度减弱。