Articles | Volume 16, issue 9
https://doi.org/10.5194/acp-16-5867-2016
https://doi.org/10.5194/acp-16-5867-2016
Research article
 | 
13 May 2016
Research article |  | 13 May 2016

Modeling lightning-NOx chemistry on a sub-grid scale in a global chemical transport model

Alicia Gressent, Bastien Sauvage, Daniel Cariolle, Mathew Evans, Maud Leriche, Céline Mari, and Valérie Thouret

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Short summary
In chemical transport models, NOx emitted by lightning (LNOx) is instantaneously diluted into the grid. A plume-in-grid parameterization to account for the sub-grid chemistry of LNOx is presented. This approach was implemented into the GEOS-Chem model and leads to a relative increase of NOx and O3 (18 % and 2 %, respectively, in July) on a large scale downwind of lightning emissions and a relative decrease (25 % and 8 %, respectively, over central Africa in July) over the regions of emissions.
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