Transient planetary waves simulated by GFDL spectral general circulation models. Part II: effects of nonlinear energy transfer.

Abstract

In order to study how transient planetary waves in the midlatitude troposphere are maintained, a space-time spectral analysis over a 1-year data set is made of a GFDL spectral general circulation model. It is found that the kinetic energy of both westward and eastward moving ultralong waves with periods less than 20 days is maintained primarily through conversion from wave available-potential energy.-from Authors