Nonlinear Normal Mode Initialization and Quasi-Geostrophic Theory

Abstract

The first iteration of the recently developed nonlinear normal mode initialization procedure for primitive equation models leads to quasi-rotational dynamical and diagnostic equations agreeing with those of quasi-geostrephic theory in a simple Boussinesq f plane model. The proper initialization of a quasi-rotational model, however. requires a nonlinear modification of the geostrophic state traditionally used. Various generalizations are discussed briefly.