Author(s)

Martin Hausmann, Frank Holland, Jorg-Peter Kohlmann, Franz Rohrer and Dieter. H. Ehhalt

Abstract

Dependence of the OH Radical on its Precursors: An Investigation into the POPCORN Results Guest contribution Martin Hausmann, Frank Holland, Jorg-Peter Kohlmann, Franz Rohrer and Dieter. H. Ehhalt Forschungszentrum Jiilich, Institut fur Atmospharische Chemie, D-52425 Jiilich, Germany Introduction OH is the most important tropospheric free radical, because it reacts with almost all atmospheric trace gases, that are emitted into the atmosphere by biogenic and anthropogenic activities, initiating their oxidation. In turn, the concentration of OH strongly depends on the atmospheric abundance of these trace compounds to various degrees. Atmospheric OH is primarily formed by the photolysis of ozone by ultraviolet sunlight to yield electronically excited oxygen atoms, O('D), which subsequently react with water vapour to form OH Most of the OH radicals react with CO, CR, and hydrocarbons which finally

Keywords