A comparison of two cumulus parameterization schemes in a linear model of wave-CISK.

Abstract

A linear model of wave-CISK consisting of the primitive equations formulated on an equatorial beta-plane with a resting basic state, is used to compare the relatively simple cumulus parameterization scheme developed by Stevens and Lindzen with the relatively complex one developed by Arakawa and Schubert. The comparsion is based mainly on the instability characteristics and vertical structure of the wave. Results indicate that the growth rates obtained with Arakawa and Schubert's parameterization are smaller than those obtained with Stevens and Lindzen's parameterization.-from Authors