Abstract: The flow field found in a steady, axially-symmetric, strong atmospheric vortex of the dust-devil type is considered. The meridional plane containing the axis of the vortex is divided into an inviscid region where an ...

Abstract: We investigate the reflection and nonlinear interaction between the first and second harmonics of a two-dimensional Boussinesq wavetrain. Effects of topography are included, the depth departing from a constant in a finite ...

Abstract: The solution of buoyant jets in a calm stratified atmosphere is considered. The Morton model yields a set of differential equations that can be solved in a closed form in a phase space having for coordinates the integral ...

Abstract: The weakly nonlinear evolutions of the Green and Charney waves are compared for two regimes: (1) when internal dissipation is the dominant dissipation; (2) when Ekman friction is the dominant dissipation. When the Ekman ...

Abstract: The moist stability of a midlatitude zonal flow with a conditionally unstable layer in the presence of an Ekman layer is investigated. The vertical velocity employed in a simplified Kuo's parameterization is sustained by ...

Abstract: Cold season atmospheric observations of vacillation point to a wave-mean flow interaction of baroclinic, planetary waves with their mean flow, and the observational data show that wave 2 is the largest contributor to the ...

Abstract: Stability calculations on basic-state velocity profiles representative of the preferred regions for the development of the upper-level disturbances active in Type B cyclogenesis show that conditions in these regions (weak ...

Abstract: It is hypothesized that surface cyclogenesis in the Northern Hemisphere storm-track regions can be described by the structural modification of baroclinic wave packets traversing a zonally varying flow field. We test this ...

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 authors consider a two-layer quasigeostrophic model with linear surface drag and forcing that relaxes to a zonal baroclinically unstable equilibrium state consisting of a meridionally confined temperature gradient. It ...