Articles | Volume 21, issue 17
Atmos. Chem. Phys., 21, 13077–13098, 2021
https://doi.org/10.5194/acp-21-13077-2021
Atmos. Chem. Phys., 21, 13077–13098, 2021
https://doi.org/10.5194/acp-21-13077-2021

Research article 03 Sep 2021

Research article | 03 Sep 2021

Isotopic evidence for dominant secondary production of HONO in near-ground wildfire plumes

Jiajue Chai et al.

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Isotopic evidence for dominant secondary production of HONO in near-ground wildfire plumes Jiajue Chai https://doi.org/10.26300/k056-fs32

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Short summary
Nitrous acid (HONO) derived from wildfire emissions plays a key role in controlling atmospheric oxidation chemistry. However, the HONO budget remains poorly constrained. By combining the field-observed concentrations and novel isotopic composition (N and O) of HONO and nitrogen oxides (NOx), we quantitatively constrained the relative contribution of each pathway to secondary HONO production and the relative importance of major atmospheric oxidants (ozone versus peroxy) in aged wildfire smoke.
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