A new source of sulfates in the atmosphere
A.N. Yermakov1, A.E. Aloyan2, V.O. Arutyunyan2, G.B. Pronchev1
1V.L. Talroze Institute of Energy Problems of Chemical Physics of the Russian Academy of Sciences N.N. Semenov Institute of Chemical Physics, RAS, Moscow, Russia
2Marchuk Institute of Numerical Mathematics of the Russian Academy of Sciences, Moscow, Russia
Keywords: aerosol haze, sulfur dioxide, catalysis, Fe/Mn ions, branched mode
Abstract
Monitoring data on sulfates in atmospheric haze particles over Beijing in winter 2016 are considered. It has been established that the source of sulfates in humidified haze particles is the catalytic oxidation of sulfur dioxide (SO2(газ)Mn/Fe,O2→SO2-4(aq)) proceeding in a branched mode. Concentration conditions of this process and the features of its dynamics in the atmosphere are discussed. The agreement between the calculated content of in particles and monitoring data indicates a branched mode of catalytic conversion of SO2 in the atmosphere - a new source of sulfates. This fast non-photochemical channel should be taken into account in inventory system of sulfate sources in the global atmosphere.
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