Articles | Volume 18, issue 10
https://doi.org/10.5194/acp-18-7669-2018
https://doi.org/10.5194/acp-18-7669-2018
Research article
 | 
01 Jun 2018
Research article |  | 01 Jun 2018

Strong impacts on aerosol indirect effects from historical oxidant changes

Inger Helene Hafsahl Karset, Terje Koren Berntsen, Trude Storelvmo, Kari Alterskjær, Alf Grini, Dirk Olivié, Alf Kirkevåg, Øyvind Seland, Trond Iversen, and Michael Schulz

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This study highlights the role of oxidants in modeling of the preindustrial-to-present-day aerosol indirect effects. We argue that the aerosol precursor gases should be exposed to oxidants of its era to get a more correct representation of secondary aerosol formation. Our global model simulations show that the total aerosol indirect effect changes from −1.32 to −1.07 W m−2 when the precursor gases in the preindustrial simulation are exposed to preindustrial instead of present-day oxidants.
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