Stratospheric ozone in 3-D models : A simple chemistry and the cross-tropopause flux

摘要: Two simple and computationally efficient models for simulating stratospheric ozone in three-dimensional global transport are presented. The first, linearized (or Linoz), is a first-order Taylor expansion of chemical rates which the tendency has been about local mixing ratio, temperature, overhead column density. second, synthetic Synoz), passive, ozone-like tracer released into stratosphere at rate equivalent to that cross-tropopause flux which, based on measurements tracer-tracer correlations, we have calculated be 475±120 Tg/yr. Linoz Synoz evaluated UC Irvine model (CTM) with three different archived meteorological fields: Goddard Institute Space Studies (GISS) general circulation (GCM) version II′, GISS GCM II, merged forecast data from European Centre (EC/Oslo). produced realistic annual, fluxes 421 Tg/yr II′ winds 458 EC/Oslo winds; II an unrealistic 790 profiles vicinity tropopause using were found good agreement observations. We conclude either approach may adequate CTM focusing tropospheric chemistry but can also used calculating fields interactively GCM. A future will allow evolving background concentrations key source gases, such as CH4 N2O, thus applicable long-term climate simulations.