摘要
利用包含大地形和常数纬向基本气流的正压模式方程组，研究了大地形对低频波激发的作用，结果表明：起作用的地形因子主要是地形的最大高度和地形坡度。地形最大高度的作用主要是使Ｒｏｓｓｂｙ波趋向低频，而地形坡度的作用主要是对Ｒｏｓｂｙ波的稳定性起决定作用。同时，适当的地形坡度也可导致低频波的形成。
A barotropic model, including large-scale topography and zonal mean flow, was established to discuss the effects of large-scale topography on the low-frenquency waves. The results show that two main factors which affects low-frequency waves is maximal height of topography and topographic slope. The former makes frequency of topographic Rossby waves decrease, the latter makes Rossby waves instable. Moreover, when topographic slope is optimum, it can also make Rossby waves turn into low-frequency waves.
出处
《高原气象》
CSCD
北大核心
1998年第3期223-230,共8页
Plateau Meteorology
基金
国家攀登B项目
攀登项目
关键词
大地形
低频波
地形坡度
正压模式
气压
气流
Large-scale topography Low-frequency waves Maximal height of topography Topographic slope
