下坡运动的分析解

本文采用二层模式,在一个斜坡地形上,求解大气波动方程,得出了下坡运动的普遍分析解,并对解在不同大气条件和地形条件下的物理意义做了分析。当下层大气厚而稳定、风速较强时,得到的是背风坡大风。而当下层大气强稳定、小风时,得到的是泄流风。对各类下坡运动近地面风速和大气层结、流场结构及Scorer参数之间的关系也做了讨论。

ANALYTICAL SOLUTIONS OF DOWNSLOPEMOTIONS

The solutions of the downslope motions over a slope terrain are solved analytically in terms of the atmospheric wave equations with a two-layer model. The physical meanings of the solutions are discussed. As the lower layer of the atmosphere is stable and deep with strong wind the solution represents strong downslope wind, while the lower part is strong stable with light wind the drainage flow is obtained. The dependence of the strength of downslope motion near the surface on the atmospheric stratification, wind field structure as well as Scorer parameter is also examined.