The influence of O4 in Chapman's model for stratospheric ozone

The Chapman's model for the explanation of stratospheric ozone involves O, O2 and O3 in four chemical reactions. The concentration of O3 indicated by this model is overestimated in relation to the experimental value. The additional inclusion of different molecules like NOx, HOx and ClOx in various reactions partially diminishes the large difference between theory and experiment. In this work, we have included the reaction O4(1A1)→O3(1A1)+O(3P) in Chapman's reaction whereas the agreement with experiment is improved.