摘要
在对青藏高原大地形的动力和热力作用作物理分析的基础上 ,着重分析了青藏高原地形坡度和非绝热加热对二维Rossby波的影响。研究指出 :高原地形坡度对Rossby波的作用与Rossby参数的作用相当 ,而且其相速度和群速度之间存在一个圆的关系 :(cgx-cx) 2 +c2 gy =R2 ;高原加热作用与水平辐合作用相当。地形坡度和非绝热加热都有使二维Rossby波向低频发展的趋向。
On the basis of analysis on dynamic and thermal effects of large scale topography of Qinghai Xizang Plateau we will focus to analyze the effect of slope and diabatic heating of Qinghai Xizang Plateau on the 2 D Rossby wave. It is shown that the effect of topography slope of Qinghai Xizang Plateau on Rossby wave is equivalent to the effect of Rossby parameter; it is a circle between phase velocity and group velocity (c gx -c x) 2+c 2 gy =R 2; and the heating effect is just equivalent to the effect of horizontal convergence. The slope and biabatic heating will make 2 D Rossby wave turning into low frequency wave.
出处
《高原气象》
CSCD
北大核心
2000年第3期331-338,共8页
Plateau Meteorology
基金
"国家重点基础研究发展规划"首批启动的"我国重大气候灾害的机理和预测理论研究"项目
国家攀登B项目"青藏高原地 气系统物理过程观