Articles | Volume 19, issue 19
Research article
02 Oct 2019
Research article |  | 02 Oct 2019

Relative humidity and O3 concentration as two prerequisites for sulfate formation

Yanhua Fang, Chunxiang Ye, Junxia Wang, Yusheng Wu, Min Hu, Weili Lin, Fanfan Xu, and Tong Zhu


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Chunxiang Ye on behalf of the Authors (23 Jul 2019)  Author's response   Manuscript 
ED: Publish as is (24 Jul 2019) by Jianmin Chen
AR by Chunxiang Ye on behalf of the Authors (31 Jul 2019)  Author's response   Manuscript 

Post-review adjustments

AA: Author's adjustment | EA: Editor approval
AA by Chunxiang Ye on behalf of the Authors (05 Sep 2019)   Author's adjustment   Manuscript
EA: Adjustments approved (29 Sep 2019) by Jianmin Chen
Short summary
Year-long observations of PM2.5, gaseous pollutants, and meteorological parameters in Beijing were analysed to investigate sulfate formation. RH and O3 concentrations above thresholds of 45 % and 35 ppb, respectively, greatly accelerated sulfate formation. Ambient changes in RH and O3 contributed to variations in sulfate formation among different seasons and pollution levels. A shift from gas-phase to multiphase SO2 oxidation contributed to fast sulfate formation under polluted conditions.
Final-revised paper