On the Response of Forced Rossby Waves to the Time Change of Zonal Wind and Forcing

[摘要]  An examination is made of the response of forced Rossby waves to the time change of mean zonal wind and to external heating using quasi-geostrophic and β-plane approximations. Results from the numerical time integration of the linearized potential vorticity equation under several assumed external conditions are compared with steady-state solutions.  Four cases were studied for the effects of time change of mean zonal wind and thermal forcing; it was found that the “maximum response time scale” (the period at which the wave amplification becomes maximum) has a significant linear relationship to the wave amplitude of the steady-state solution in the uppermost layer.

[学科分类] 大气科学