Oxidative capacity and radical chemistry in the polluted atmosphere of Hong
Kong and Pearl River Delta region: analysis of a severe photochemical smog
episode

Xue, Likun; Gu, Rongrong; Wang, Tao; Wang, Xinfeng; Saunders, Sandra; Blake, Donald; Louie, Peter K. K.; Luk, Connie W. Y.; Simpson, Isobel; Xu, Zheng; Wang, Zhe; Gao, Yuan; Lee, Shuncheng; Mellouki, Abdelwahid; Wang, Wenxing

doi:https://doi.org/10.5194/acp-16-9891-2016

Articles | Volume 16, issue 15

https://doi.org/10.5194/acp-16-9891-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-16-9891-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 16, issue 15

Research article

|

08 Aug 2016

Research article |

| 08 Aug 2016

Oxidative capacity and radical chemistry in the polluted atmosphere of Hong Kong and Pearl River Delta region: analysis of a severe photochemical smog episode

Likun Xue, Rongrong Gu, Tao Wang, Xinfeng Wang, Sandra Saunders, Donald Blake, Peter K. K. Louie, Connie W. Y. Luk, Isobel Simpson, Zheng Xu, Zhe Wang, Yuan Gao, Shuncheng Lee, Abdelwahid Mellouki, and Wenxing Wang

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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: 'Reviewer's comments', Anonymous Referee #1, 14 Mar 2016
- AC2: 'Response to reviewer 1', L.K. Xue, 23 May 2016
RC2: 'A review report on “Oxidative capacity and radical chemistry in the polluted atmosphere of Hong Kong and Pearl River Delta region: analysis of a severe photochemical smog episode” by Xue et al. (2016)', Anonymous Referee #2, 15 Mar 2016
- AC1: 'Response to the referee 2', L.K. Xue, 23 May 2016

Peer-review completion

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

AR by L.K. Xue on behalf of the Authors (11 Jun 2016) Author's response Manuscript

ED: Referee Nomination & Report Request started (27 Jun 2016) by Dwayne Heard

RR by Anonymous Referee #2 (27 Jun 2016)

RR by Anonymous Referee #1 (10 Jul 2016)

ED: Publish subject to technical corrections (17 Jul 2016) by Dwayne Heard

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Short summary

The chemical budgets and principal sources of RO_x and NO₃ radicals during a multi-day photochemical smog episode in Hong Kong are elucidated by an observation-constrained MCM model. NO₃ was shown to be an important oxidant even during daytime in a pollution case when high aerosol loading attenuated the solar irradiation. This study suggests the potential important role of daytime NO₃ chemistry in polluted atmospheres under conditions with the co-existence of abundant O₃, NO₂, VOCs, and aerosols.