A 3-DIMENSIONAL CHEMICAL-TRANSPORT MODEL OF THE STRATOSPHERE - MIDLATITUDE RESULTS

A prototype robust three-dimensional global chemical transport model ( CTM) has been developed in order to facilitate a realistic simulation of stratospheric chemistry and dynamics. The current application is fo r a 100-day run from August 10 to November 17 using the average (ensem ble) of 10 dynamical runs (realizations) of the CCM1. The CTM results are compared with observations and two-dimensional model results. A co mparison of the midlatitude model results with satellite observations, stratospheric and mesospheric sounder (SAMS) and Halogen Occultation Experiment (HALOE), showed that the model can simulate relatively well , at least on the timescale of the simulation, the distribution and fo rmation of long-lived species (N2O, CH4, and H2O). The distribution of short-lived species was compared with some satellite measurements, li mb infrared monitor of the stratosphere (LIMS) and Stratospheric aeros ol and Gas Experiment (SAGE II); and two-dimensional model results, an d was found to be consistent.