Modeling the impact of COVID-19 on air quality in southern California: implications for future control policies

Jiang, Zhe; Shi, Hongrong; Zhao, Bin; Gu, Yu; Zhu, Yifang; Miyazaki, Kazuyuki; Lu, Xin; Zhang, Yuqiang; Bowman, Kevin W.; Sekiya, Takashi; Liou, Kuo-Nan

doi:https://doi.org/10.5194/acp-21-8693-2021

Articles | Volume 21, issue 11

https://doi.org/10.5194/acp-21-8693-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-8693-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 11

Research article

|

09 Jun 2021

Research article |

| 09 Jun 2021

Modeling the impact of COVID-19 on air quality in southern California: implications for future control policies

Zhe Jiang, Hongrong Shi, Bin Zhao, Yu Gu, Yifang Zhu, Kazuyuki Miyazaki, Xin Lu, Yuqiang Zhang, Kevin W. Bowman, Takashi Sekiya, and Kuo-Nan Liou

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Final revised paper (published on 09 Jun 2021)
Supplement to the final revised paper
Preprint (discussion started on 29 Dec 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: 'Review comments on “Modeling the impact of COVID-19 on air quality in Southern California: Implications for future control policies” by Jiang et al.', Anonymous Referee #3, 28 Jan 2021
- AC1: 'Reply on RC1', Bin Zhao, 10 Apr 2021
RC2: 'Review of “Modeling the Impact of COVID-19 on Air Quality in Southern California: Implications for Future Control Policies” authored by Jiang et al.', Anonymous Referee #1, 27 Feb 2021
- AC2: 'Reply on RC2', Bin Zhao, 10 Apr 2021

Peer-review completion

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

AR by Bin Zhao on behalf of the Authors (10 Apr 2021) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (12 Apr 2021) by Zhanqing Li

RR by Anonymous Referee #1 (15 Apr 2021)

RR by Anonymous Referee #3 (29 Apr 2021)

ED: Publish as is (04 May 2021) by Zhanqing Li

AR by Bin Zhao on behalf of the Authors (09 May 2021) Manuscript

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Short summary

We use the COVID-19 pandemic as a unique natural experiment to obtain a more robust understanding of the effectiveness of emission reductions toward air quality improvement by combining chemical transport simulations and observations. Our findings imply a shift from current control policies in California: a strengthened control on primary PM_2.5 emissions and a well-balanced control on NO_x and volatile organic compounds are needed to effectively and sustainably alleviate PM_2.5 and O₃ pollution.