Author(s)

D. Poppe

Abstract

Nonlinear Chemical Oscillations in Numerical Simulations with a 1-Dimensional Tropospheric Model A contribution to subproject CMD D. Poppe Institut fiir Atmospharische Chemie, Forschungszentrum Jiilich, D-52425 Julich, Germany Oscillating concentrations of trace gases due to nonlinear chemistry were found in box model calculations (Poppe and Lustfeld, 1996) for a simplified troposphere gas-phase chemistry. The reaction mechanisms encompasses only the generic reaction paths of oxidation of reduced compounds by hydroxyl radicals, the recycling of radicals between OH and the peroxy radicals, the ultimate HO* losses by the reaction of OH with NO], and the permutation reactions of the peroxy radicals. The reaction system treats only O]. CO. HOx, and NO% NO: + hv (+ air + O:) = 03 + NO (+ air) (1) O3 + hv(+H2O) = 2 OH + O: (2)

Keywords