Abstract: The dynamics responsible for the mixing and dissolution of the polar vortex during final stratospheric warmings is investigated. A GCM and an associated offline N2O transport model are used to simulate the dynamics and ...

Abstract: Temporal variances in the concentrations of N2O, CF2Cl2, CFCl3 and CH4 in the summer stratosphere at a midlatitude location have been measured by Ehhalt and others. A simple dynamical model is used to argue that these ...

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: A two-dimensional stratospheric tracer transport parameterization is developed using the theory of small amplitude generalized lagrangian means. The parameterization is tested with a severely truncated three-dimensional ...

Abstract: To study stratosphere?troposphere exchange, an approach based on the nonconservation of potential vorticity (PV) is developed; this approach arises naturally if one defines the tropopause in terms of PV. The evolution of ...

Abstract: How the surface boundary heating (sea surface temperature) and cumulus adjustment process affect the location, structure, energetics, and dynamics of the intertropical convergence zones (ITCZs) is investigated. A series ...

Abstract: This study examines the sensitivity of a number of important archetypical tracer problems to the numerical method used to solve the equations of tracer transport and atmospheric dynamics. The tracers' scenarios were ...