Abstract: The vertical mixing of tracers in the stratosphere is mainly due to patches of three-dimensional turbulence, which are highly intermittent in time and space. A simple heuristic model of this form of mixing is developed and ...

Abstract: The spontaneous generation of inertia?gravity waves by balanced motion at low Rossby number is examined using Lorenz's five-component model. The mostly numerical analysis by Lorenz and Krishnamurthy of a particular ...

Abstract: This paper discusses some of the mechanisms whereby fast inertia?gravity waves can be generated spontaneously by slow, balanced atmospheric and oceanic flows. In the small Rossby number regime relevant to midlatitude ...

Abstract: A model of tropopause dynamics is derived that is of intermediate complexity between the three-dimensional quasigeostrophic model and the surface quasigeostrophic (SQG) model. The model assumes that a sharp transition in ...

Abstract: The spontaneous generation of inertia?gravity waves by balanced motion is investigated in the limit of small Rossby number ? ? 1. Particular (sheared disturbance) solutions of the three-dimensional Boussinesq equations are ...

Abstract: The combined effects of advection and diffusion on the equilibrium spatial structure of a tracer whose spatial variation is maintained by a large-scale forcing are considered. Motivated by the lower stratosphere, the flow ...