正压大气模式下大地形和β变化的Rossby波

Rossby Waves Excited by Large Topography and Beta Change in Barotropic Atmosphere

在正压大气模式下从准地转位涡方程出发,考虑地形和β随纬度变化下引进参数δ对Rossby波的共同作用,应用正交模方法得到在中高纬度具有大地形、Froude数以及参数δ的Rossby波相速度公式;分析β变化下大地形和Froude数对Rossby波稳定度的影响,表明大地形、Froude数和参数δ对Rossby波的稳定性作用.

Based on the potential vorticity equation,the large topography and the change of Rossby wave parameter β with the latitude were considered and parameter δ was introduced.With the normal mode method,the Rossby wave phase velocity formula was obtained in the high latitude regions with the large topography,the Froude number and parameter δ.The research points out that the large topography and the Froude number under the change of β influence the stability of Rossby waves,and these factors usually play a stabilizing part in the Rossby waves.