Author(s)

B. Ervens, H. Herrmann, O. Boge, R. Wolke and R Zellner

Abstract

Modelling Calculations of Gas-Phase and Aqueous-Phase Chemistry in the Troposphere A contribution to subproject CMD B Ervens\ H Herrmann'**, O Boge^, R Wolke^ and R Zellner* *InstitutfurPhysikalische und Theoretische Chemie, FB 8, Universitat GH Essen, Universitatsstrafie 5, D-45117 Essen, Germany ^Institutfur Troposphdrenforschung, Permoserstr. 15, D-04303 Leipzig, Germany Background and motivation Chemical reactions in the troposphere take place in the gas phase or in or at particles. Reactions in the latter case in many cases may be described by aqueous chemistry concepts (Schwartz, 1989). The phase transfer can be described with Henry equilibria or, more precisely, by the resistance model by Schwartz (see Zellner and Herrmann, 1995). In the aqueous phase, radicals such as OH, NOg, S(V, Ck" , 6% , CCV and peroxyl radicals may represent important oxidants (Schwartz, 1989). In existing tropospheric aqueous phase ch

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