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Enhanced Role of Transition Metal Ion Catalysis During In-Cloud Oxidation of SO 2

2013; American Association for the Advancement of Science; Volume: 340; Issue: 6133 Linguagem: Inglês

10.1126/science.1230911

1095-9203

Eliza Harris, Baerbel Sinha, Dominik van Pinxteren, Andreas Tilgner, Khanneh Wadinga Fomba, Johannes Schneider, Anja Roth, T. Gnauk, B. Fahlbusch, Stephan Mertes, Taehyoung Lee, Jeffrey L. Collett, Stephen F. Foley, Stephan Borrmann, P. Höppe, Hartmut Herrmann,

Air Quality and Health Impacts

Dust in the Clouds Sulfate aerosols have the greatest radiative impact on climate systems. Harris et al. (p. 727 ) report that the oxidation of sulfur dioxide gas, catalyzed by natural transition metal ions mostly on the surface of coarse mineral dust, is the dominant pathway for sulfate production in clouds. In view of the growing sulfur dioxide emissions from large, industrializing countries, including this process in climate models should improve the agreement between models and observations.