Enhanced role of transition metal Ion catalysis during In-Cloud oxidation of SO2

Eliza Harris*, Bärbel Sinha, Dominik Van Pinxteren, Andreas Tilgner, Khanneh Wadinga Fomba, Johannes Schneider, Anja Roth, Thomas Gnauk, Benjamin Fahlbusch, Stephan Mertes, Taehyoung Lee, Jeffrey Collett, Stephen Foley, Stephan Borrmann, Peter Hoppe, Hartmut Herrmann

*Corresponding author for this work

Research output: Contribution to journalArticle

174 Citations (Scopus)

Abstract

Global sulfate production plays a key role in aerosol radiative forcing; more than half of this production occurs in clouds. We found that sulfur dioxide oxidation catalyzed by natural transition metal ions is the dominant in-cloud oxidation pathway. The pathway was observed to occur primarily on coarse mineral dust, so the sulfate produced will have a short lifetime and little direct or indirect climatic effect. Taking this into account will lead to large changes in estimates of the magnitude and spatial distribution of aerosol forcing. Therefore, this oxidation pathway - which is currently included in only one of the 12 major global climate models - will have a significant impact on assessments of current and future climate.

Original languageEnglish
Pages (from-to)727-730
Number of pages4
JournalScience
Volume340
Issue number6133
DOIs
Publication statusPublished - 2013

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