Scaling Approaches to Quasigeostrophic Theory for Moist, Precipitating Air

Abstract Quasigeostrophic (QG) theory is of fundamental importance in the study large-scale atmospheric flows. In recent years, there has been growing interest extending classical QG plus Ekman friction layer model (QG–Ekman) to systematically include additional physical processes known significantly contribute real-life weather phenomena. This paper lays foundation for combining two these developments, namely, Smith and Stechmann’s family precipitating quasigeostrophic (PQG) models on one hand, extension QG–Ekman dry air by a strongly diabatic (DL) intermediate height (QG–DL–Ekman) other hand. To this end, PQG equations soundproof motions are first corroborated within general asymptotic modeling framework starting from full compressible flow model. The derivations show that naturally embedded hierarchy scale-dependent introduced present authors. Particular emphasis then placed an scaling regime accounts generic Kessler-type bulk microphysics closure compatible with QG–DL–Ekman theory. detailed derivation moist deferred future publication.