Abstract: The numerical modeling of stratospheric, quasi-geostrophic Rossby wave propagation on a beta-plane channel is examined to determine how wave propagation is affected by the use of low horizontal (spectral) resolution. This ...

Abstract: A significant fraction of the interannual variability of the wintertime stratosphere in the Northern Hemisphere is related to the quasi-biennial oscillation (QBO) in tropical winds. Disturbed conditions of the polar night ...

Abstract: The influence of the equatorial quasi-biennial oscillation (QBO) on the winter middle atmosphere is modeled with a mechanistic global primitive equation model. The model's polar vortex evolution is sensitive to the lower ...

Abstract: The excitation and propagation of inertia?gravity waves (IGWs) generated by an unstable baroclinic wave was examined with a high-resolution 3D nonlinear numerical model. IGWs arose spontaneously as the tropospheric jetstream ...

Abstract: The two phases of the quasi-biennial oscillation in ozone are simulated using winds generated by a three-dimensional mechanistic stratospheric model input into an off-line ozone transport model. Ozone chemistry is parameterized ...

Abstract: The seasonal (wintertime) development of middle atmosphere circulation in opposite phases of the equatorial quasi-biennial oscillation (QBO) was simulated with a three-dimensional nonlinear numerical model. In the stratosphere, ...

Abstract: A mechanistic model of the middle atmosphere is used to study the interaction between Rossby waves forced at the extratropical tropopause and inertial instability in the equatorial lower mesosphere. The impact of ...

Abstract: Using 30 years of Northern Hemisphere geopotential data, from 1000 to 10 hPa, the link between three fundamental modes of tropospheric variability [the Pacific/North America (PNA), Western Pacific Oscillation (WPO), and ...

Abstract: Horizontal air motions accompanying the development of a planetary wave critical layer are investigated on the sphere in the equivalent barotropic framework. For small wave amplitude or strong shear in the neighborhood of ...

Abstract: Transport properties of the two-dimensional equations governing equivalent barotropic motion are investigated on the sphere. Because of its relationship to the primitive equations in isentropic coordinates, the equivalent ...