An interactive chemical dynamical radiative two-dimensional model of the middle atmosphere

摘要: This paper describes a new two-dimensional model of the stratosphere and mesosphere in which dynamics, radiation chemistry are treated interactively. The transport equations expressed transformed Eulerian framework. Momentum deposition associated with Rossby wave absorption gravity breaking related eddy diffusion coefficients parameterized as function mean zonal state atmosphere. Diabatic heating cooling is derived from detailed National Center for Atmospheric Research community climate radiative code. distributions chemically active species belonging to oxygen, hydrogen, nitrogen chlorine families calculated present-day conditions. By applying near tropopause different dynamical forcing each hemisphere, produces significant hemispheric asymmetries quantities (e.g., temperature) trace gas densities column ozone), good agreement climatological values. It shown that source gases, such nitrous oxide methane, very sensitive (and parameterized) produced atmosphere, like carbon monoxide odd nitrogen, can provide interesting information on role atmospheric transport. A major problem remains be elucidated underestimation by most models ofmore » ozone density upper stratosphere. Because many feedback mechanisms included its formulation, well adapted study effects human or natural perturbations. response atmosphere perturbations resulting increasing emissions CO{sub 2} chlorofluorocarbons considered.« less