Elevated levels of OH observed in haze events during wintertime in central Beijing

Slater, Eloise J.; Whalley, Lisa K.; Woodward-Massey, Robert; Ye, Chunxiang; Lee, James D.; Squires, Freya; Hopkins, James R.; Dunmore, Rachel E.; Shaw, Marvin; Hamilton, Jacqueline F.; Lewis, Alastair C.; Crilley, Leigh R.; Kramer, Louisa; Bloss, William; Vu, Tuan; Sun, Yele; Xu, Weiqi; Yue, Siyao; Ren, Lujie; Acton, W. Joe F.; Hewitt, C. Nicholas; Wang, Xinming; Fu, Pingqing; Heard, Dwayne E.

doi:https://doi.org/10.5194/acp-20-14847-2020

Articles | Volume 20, issue 23

https://doi.org/10.5194/acp-20-14847-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

In-depth study of air pollution sources and processes within...

https://doi.org/10.5194/acp-20-14847-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 23

Research article

|

02 Dec 2020

Research article |

| 02 Dec 2020

Elevated levels of OH observed in haze events during wintertime in central Beijing

Eloise J. Slater, Lisa K. Whalley, Robert Woodward-Massey, Chunxiang Ye, James D. Lee, Freya Squires, James R. Hopkins, Rachel E. Dunmore, Marvin Shaw, Jacqueline F. Hamilton, Alastair C. Lewis, Leigh R. Crilley, Louisa Kramer, William Bloss, Tuan Vu, Yele Sun, Weiqi Xu, Siyao Yue, Lujie Ren, W. Joe F. Acton, C. Nicholas Hewitt, Xinming Wang, Pingqing Fu, and Dwayne E. Heard

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Final revised paper (published on 02 Dec 2020)
Supplement to the final revised paper
Preprint (discussion started on 06 May 2020)
Supplement to the preprint

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Anonymous Review', Anonymous Referee #1, 08 Jun 2020
- AC1: 'Response to Reviewer 1', Dwayne Heard, 17 Aug 2020
RC2: 'Review of Elevated levels of OH observed in haze events during wintertime in central Beijing', Anonymous Referee #2, 08 Jun 2020
- AC2: 'Response to Reviewer 2', Dwayne Heard, 17 Aug 2020
RC3: 'Review of Slater et al.', Anonymous Referee #3, 27 Jun 2020
- AC3: 'Response to Reviewer 3', Dwayne Heard, 17 Aug 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Dwayne Heard on behalf of the Authors (18 Aug 2020)

ED: Referee Nomination & Report Request started (24 Aug 2020) by Frank Keutsch

RR by Anonymous Referee #3 (04 Sep 2020)

RR by Anonymous Referee #2 (04 Sep 2020)

RR by Anonymous Referee #1 (14 Sep 2020)

ED: Publish as is (24 Sep 2020) by Frank Keutsch

AR by Dwayne Heard on behalf of the Authors (04 Oct 2020) Manuscript

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Short summary

The paper details atmospheric chemistry in a megacity (Beijing), focussing on radicals which mediate the formation of secondary pollutants such as ozone and particles. Highly polluted conditions were experienced, including the highest ever levels of nitric oxide (NO), with simultaneous radical measurements. Radical concentrations were large during "haze" events, demonstrating active photochemistry. Modelling showed that our understanding of the chemistry at high NO_x levels is incomplete.