The simulation of atmospheric ozone distribution with a 2-D model and validation against UARS and TOMS data

A two-dimensional model of radiative, dynamical and photochemical processes in the atmosphere has been developed and used for the simulation of ozone distribution. The results of numerical simulations are compared with UARS a nd TOMS measurements. The comparison shows that the overall agreement betwe en simulated and UARS stratospheric ozone data is within 5-15% for almost a ll of the stratosphere except for the high latitudes of the winter hemisphe re. This kind of disagreement is a common problem for all 2-D models, which cannot resonably reproduce planetary and gravity wave breaking processes o ver high latitudes. Validation of the simulated total ozone against TOMS da ta also shows a good overall agreement. The the total ozone difference betw een the 2-D model results and TOMS measurements is within 5-10% in both Nor thern and Southern hemispheres during all seasons except 40 degrees S-60 de grees S from June to October. In this region, the difference between simula ted and TOMS total ozone is 30%. (C) 1999 Elsevier Science Ltd. All rights reserved.