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

Chang, Yunhua; Zhang, Yanlin; Tian, Chongguo; Zhang, Shichun; Ma, Xiaoyan; Cao, Fang; Liu, Xiaoyan; Zhang, Wenqi; Kuhn, Thomas; Lehmann, Moritz F.

doi:https://doi.org/10.5194/acp-18-11647-2018

Articles | Volume 18, issue 16

https://doi.org/10.5194/acp-18-11647-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Multiphase chemistry of secondary aerosol formation under...

https://doi.org/10.5194/acp-18-11647-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 16

Research article

|

16 Aug 2018

Research article |

| 16 Aug 2018

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

Yunhua Chang, Yanlin Zhang, Chongguo Tian, Shichun Zhang, Xiaoyan Ma, Fang Cao, Xiaoyan Liu, Wenqi Zhang, Thomas Kuhn, and Moritz F. Lehmann

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Final revised paper (published on 16 Aug 2018)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Interactive comment on “Nitrogen isotope fractionation during gas-particle conversion of NOx to NO3− in the atmosphere – implications for isotope-based NOx source apportionment” by Chang et al.', Anonymous Referee #1, 01 Jun 2018
- AC1: 'Response to reviewers', Yunhua Chang, 31 Jul 2018
RC2: 'Comments', Anonymous Referee #2, 30 Jul 2018
- AC2: 'Response to Reviewer 2', Yunhua Chang, 31 Jul 2018

Peer-review completion

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

AR by Yunhua Chang on behalf of the Authors (05 Aug 2018) Manuscript

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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 NO_x, consider this N isotope fractionation. Future assessments of NO_x emissions in China (and elsewhere) should involve simultaneous δ¹⁵N and δ¹⁸O measurements of atmospheric nitrate and NO_x at high spatiotemporal resolution, allowing former N-isotope-based NO_x source partitioning estimates to be reevaluated more quantitatively.