Abstract: Weakly nonlinear interactions between an unstable baroclinic wave and resonant topographic wave are investigated using asymptotic methods in a two-layer, quasi-geostrophic channel model on a midlatitude beta plane in the ...

Abstract: The role of ozone in the linear stability of Rossby normal modes is examined in a continuously stratified, extratropical baroclinic atmosphere. The flow is described by coupled equations for the quasi-geostrophic potential ...

Abstract: A simple ?-plane model that couples radiative transfer, ozone advection, and ozone photochemistry with the quasi-geostrophic dynamical circulation is used to study the diabatic effects of Newtonian cooling and ozone?dynamics ...

Abstract: Jin and Ghil demonstrate that for topographically resonant flow, low-frequency finite-amplitude oscillations may arise from wave?wave interactions and topographic form drag. Their model is extended to include a zonally ...

Abstract: The extratropical response to localized, low-frequency tropical forcing is examined using a linearized, non-divergent barotropic model on a sphere. Zonal-mean basic states characterized by solid-body rotation or critical ...

Abstract: A spherical nondivergent barotropic model, linearized about a 300-mb climatological January flow, is used to examine the extratropical response to low-frequency tropical forcing. A two-dimensional WKB analysis shows that ...

Abstract: A theory is presented that addresses the connection between low-frequency wave packets (LFWPs) and the formation and decay of coherent structures (CSs) in large-scale atmospheric flow. Using a weakly nonlinear evolution ...

Abstract: The stability of a basic state composed of a westward-moving wave and a zonal mean jet is examined in a linearized barotropic nondivergent model on a sphere. The sensitivity of the stability to the strength and structure ...

Abstract: An equatorial beta-plane model of the stratosphere is used to examine the effects of longwave radiational cooling, ozone photochemistry, and ozone advection on the linear spatial modulation of forced equatorial Kelvin ...

Abstract: Finite-amplitude dynamics of a slightly dissipative baroclinic wave in a two-layer, ?-plane channel model at the point of minimum critical shear are examined. At this point, both the potential vorticity gradient and the ...