( 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 )地形作用相當(dāng)于增加了地面粗糙度,地形壓力梯度項(xiàng)與摩擦項(xiàng)地疊加,相當(dāng)于使摩擦阻尼作用增大,地形強(qiáng)迫作用使下邊界層從上至下風(fēng)速減小,風(fēng)向向左偏轉(zhuǎn)。