Isotopic constraints on the role of hypohalous acids in sulfate aerosol
formation in the remote marine boundary layer

Chen, Qianjie; Geng, Lei; Schmidt, Johan A.; Xie, Zhouqing; Kang, Hui; Dachs, Jordi; Cole-Dai, Jihong; Schauer, Andrew J.; Camp, Madeline G.; Alexander, Becky

doi:https://doi.org/10.5194/acp-16-11433-2016

Articles | Volume 16, issue 17

https://doi.org/10.5194/acp-16-11433-2016

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

https://doi.org/10.5194/acp-16-11433-2016

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

Articles | Volume 16, issue 17

Research article

|

14 Sep 2016

Research article |

| 14 Sep 2016

Isotopic constraints on the role of hypohalous acids in sulfate aerosol formation in the remote marine boundary layer

Qianjie Chen, Lei Geng, Johan A. Schmidt, Zhouqing Xie, Hui Kang, Jordi Dachs, Jihong Cole-Dai, Andrew J. Schauer, Madeline G. Camp, and Becky Alexander

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Final revised paper (published on 14 Sep 2016)
Supplement to the final revised paper
Preprint (discussion started on 12 May 2016)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'review', Rolf Sander, 12 Jul 2016
- AC1: 'Responses to Referee #1', Qianjie Chen, 23 Aug 2016
- AC3: 'Responses to Referee #1', Qianjie Chen, 23 Aug 2016
RC2: 'Review of “Isotopic constraints on the role of hypohalous acids in sulfate aerosol.."', Ann-Lise Norman, 30 Jul 2016
- AC2: 'Responses to Referee #2', Qianjie Chen, 23 Aug 2016

Peer-review completion

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

AR by Qianjie Chen on behalf of the Authors (24 Aug 2016) Author's response Manuscript

ED: Publish as is (24 Aug 2016) by Eliza Harris

AR by Qianjie Chen on behalf of the Authors (24 Aug 2016) Author's response Manuscript

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Short summary

The formation mechanisms of sulfate in the marine boundary layer are not well understood, which could result in large uncertainties in aerosol radiative forcing. We measure the oxygen isotopic composition (Δ¹⁷O) of sulfate collected in the MBL and analyze with a global transport model. Our results suggest that 33–50 % of MBL sulfate is formed via oxidation of S(IV) by hypohalous acids HOBr / HOCl in the aqueous phase, and the daily-mean HOBr/HOCl concentrations are on the order of 0.01–0.1 ppt.