迎风坡空气抬升，背风坡空气下沉。
将沙丘背风坡的稳定性问题等价于一个双参变量函数的待定边界的泛函极值问题。
The problem of the lee slope stability of dune is equivalent to the extremal problem of a functional of two-variant function with a variable boundary in this paper.
当冷锋位于背风坡时，在暖区沿锋面上升的暖空气运动范围增大，可以出现沿锋面相间隔的多个上升区。
There are multiple vertical upwarding zones in the warm side when the cold front passages in the leeward side.
除迎风坡空气抬升和背风坡引起上升运动外，还有地形加热引起的上升运动，这些对水汽、能量等的垂直输送起着重要作用。
Besides, topographic heating, air lifting on windward slope and lee wave play an important role in vertical transport of moisture and energy.
阿曼一座新月形的沙丘脊由强信风吹成，在迎风的方向（图左侧）形成一面平缓的凸破，在背风面形成凹坡。
This crescent-shaped ridge of sand dune in Oman was formed by strong trade winds that form a smooth hill facing the wind (left) and concave slipface on the back.
阿曼一座新月形的沙丘脊由强信风吹成，在迎风的方向（图左侧）形成一面平缓的凸破，在背风面形成凹坡。
This crescent-shaped ridge of sand dune in Oman was formed by strong trade winds that form a smooth hill facing the wind (left) and concave slipface on the back.
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