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The chemistry climate model ECHAM5/MESSy1 (E5/M1) in asetup extending from the surface to 80 km witha vertical resolution of about 600 m near the tropopause with nudged troposphericmeteorology allows a direct comparison with satellite data of chemical speciesat the same time and location. Here we present results out of a transient 10~yearssimulation for the period of the Antarctic vortex split in September 2002,where data of MIPAS on the ENVISAT-satellite areavailable. For the first time this satellite instrument opens the opportunity,to evaluate all stratospheric nitrogen containing species simultaneously with agood global coverage, including the source gas N2O and ozone which allows an estimate forNOx-production in the stratosphere. We show correlations between simulated andobserved species in the altitude region between 10 and 50 hpa for differentlatitude belts, together with the Probability Density Functions (PDFs) of model results and observations.This is supplemented by global maps on pressure levels showing the comparison between the satelliteand the simulated data sampled at the same time and location. We demonstrate that the modelin most cases captures the partitioning in the nitrogen family, the diurnal cycles and thespatial distribution within experimental uncertainty. This includes even variations due to tropospheric clouds.There appears to be, however, a problemto reproduce the observed nighttime partitioning between N2O5 and NO2 in the middle stratosphere using the recommended set of reaction coefficients and photolysis data

Nitrogen compounds and ozone in the stratosphere: comparison of MIPAS satellite data with the chemistry climate model ECHAM5/MESSy1