The results also show that both gravity wave drag and envelope orography have smaller influence on model results in the beginning of simulation, but greater in the later stage.

• 不论是地形重力波拖曳还是包络地形，在模式积分的初期，它们的作用并不明显，随着积分时间的增长，它们对模拟结果的影响程度增大。