低层不稳定大气边界层中的地形阻力  

The Orographic Drag in the Lower Unstable Boundary Layer

作　　者：刘辉志[1] 洪钟祥[1] 桑建国[2] 

机构地区：[1]中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室 [2]北京大学地球物理系

出　　处：《大气科学》1998年第6期881-895,共15页Chinese Journal of Atmospheric Sciences

基　　金：国家自然科学基金

摘　　要：采用两层大气模式，通过求解线性化大气动力学—热力学方程组，得到在上层稳定层结覆盖的不稳定大气边界层中，简单三维地形引起的地形波及其波动阻力的解析表达式。讨论了地形及大气条件对地形波及波动阻力的影响。结果表明：即使在大气低层为不稳定边界层时，三维地形引起的波动在大气动量平衡中仍可起明显作用。In the present paper an analytical solution of mountain wave and surface wave drag has been obtained which induced by a three-dimensional isolated mountain in a two-layer model with a lower unstable boundary layer and an upper stable layer. The effects of the parameters of the atmosphere and mountain on the mountain wave and surface wave drag have been discussed. The studies show that mountain waves still play significant roles in the momentum budget in the atmosphere even though the lower layer in the atmosphere is unstable.

关 键 词：波动阻力 地形波 不稳定 大气边界层 地形阻力 

分 类 号：P421.3[天文地球—大气科学及气象学]