Articles | Volume 18, issue 16
Atmos. Chem. Phys., 18, 11647–11661, 2018
https://doi.org/10.5194/acp-18-11647-2018

Special issue: Multiphase chemistry of secondary aerosol formation under...

Atmos. Chem. Phys., 18, 11647–11661, 2018
https://doi.org/10.5194/acp-18-11647-2018

Research article 16 Aug 2018

Research article | 16 Aug 2018

Nitrogen isotope fractionation during gas-to-particle conversion of NOx to NO3 in the atmosphere – implications for isotope-based NOx source apportionment

Yunhua Chang et al.

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Yunhua Chang on behalf of the Authors (31 Jul 2018)  Author's response    Manuscript
ED: Publish subject to technical corrections (05 Aug 2018) by Daniel Knopf
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Short summary
We demonstrate that it is imperative that future studies, making use of isotope mixing models to gain conclusive constraints on the source partitioning of atmospheric NOx, consider this N isotope fractionation. Future assessments of NOx emissions in China (and elsewhere) should involve simultaneous δ15N and δ18O measurements of atmospheric nitrate and NOx at high spatiotemporal resolution, allowing former N-isotope-based NOx source partitioning estimates to be reevaluated more quantitatively.
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