Author(s)

G. Mauersberger

Abstract

The RADM II gas-phase system and a comprehensive reaction system in the liquid phase are coupled in a cloud- chemical box model in order to evaluate the great number of investigated reactions in the liquid phase and to derive a condensed mechanism for use in regional chemistry-transport models. The model results confirm that cloud chemistry can strongly affect the budget of photooxidants. The decoupled direct method (DDM) is used to perform a local sensitivity analysis. This analysis was applied by Pandis and Seinfeld [6] to determine the importance of reactions and pathways. It is shown that this way cannot be used in cases of complex structures like the oxidant dynamics. Therefore, the kinetic pathways of substructures are analysed and a non-local sensitivity analysis is performed. 1 Introductio

Keywords