Hongjun Gao and Jinqiao Duan
Averaging Principle for Quasi-Geostrophic Motions\\ 
 under Rapidly Oscillating Forcing
(47K, LaTeX)

ABSTRACT.  In this paper, the averaging principle for quasi-geostrophic 
 motions with rapidly oscillating forcing is 
 proved, both on finite but large time intervals and on 
 the entire time axis. This includes comparison estimate, 
 stability estimate, and convergence 
 result between quasi-geostrophic motions and its averaged motions. 
 Furthermore, the existence of almost periodic quasi-geostrophic 
 motions and attractor convergence are also investigated.