The impact of peripheral circulation characteristics of typhoon on sustained ozone episodes over the Pearl River Delta region, China

Li, Ying; Zhao, Xiangjun; Deng, Xuejiao; Gao, Jinhui

doi:https://doi.org/10.5194/acp-22-3861-2022

Articles | Volume 22, issue 6

https://doi.org/10.5194/acp-22-3861-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-3861-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 6

Research article

|

24 Mar 2022

Research article |

| 24 Mar 2022

The impact of peripheral circulation characteristics of typhoon on sustained ozone episodes over the Pearl River Delta region, China

Ying Li, Xiangjun Zhao, Xuejiao Deng, and Jinhui Gao

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Final revised paper (published on 24 Mar 2022)
Supplement to the final revised paper
Preprint (discussion started on 25 Oct 2021)
Supplement to the preprint

Interactive discussion

Status: closed

RC1:
'Comment on acp-2021-618', Anonymous Referee #2, 24 Nov 2021

General Comment:

The authors studied the impact of typhoon on the ground level ozone over the Pearl River Delta region based on surface observations of ozone and radar observations of wind profiles. They tried to understand the processes for the observed ozone enhancement associated with weak wind deepening (WWD) in the troposphere using WRF-Chem model and the process responsible for day-to-day variability of ozone during the episode. Following are the comments

(1) It was felt that mathematical equations can be moved to Appendix/Supplementary, so that the paper becomes more crisp.

(2) Presentation of results (particularly sec 3.4) needs substantial improvement.

(3) Need to improve the English language by correcting the grammar mistakes throughout the manuscript, including abstract and conclusion.

(4) Minor comments are commented as notes in the PDF version of manuscript.

Citation: https://doi.org/10.5194/acp-2021-618-RC1
- RC2:
  'Reply on RC1', Anonymous Referee #1, 06 Dec 2021
  In this manuscript, the authors gave a very details study of ozone photochemistry and the meteorology (weak wind deepening, WWD) induced by the periphery of typhoon circulations by statistical analysis from 38 case observations and one case model simulations. The topic is of great interesting to recognize ozone accumulation in daily scale from each processes of physics and chemistry. The analysis is mostly sound, but the presentation need substantial improve, and some details need clarify. I recommend a minor revision and my comments listed below.
  
  Specific comments:
  
  The presentation of the manuscript is not concise, and many sentences are not well-structured. For example, in the abstract, the much long sentence from line 18- 22, is too long and not easy to grasp main points for readers.
  
  In abstract, IPR, ADV, HDIV etc. need define.
  
  In line 25, I suggest that “the decrease of advection outflow” replaces “the decrease of the negative ADV”, making the presentation more direct and easy to understand.
  
  In line 30, I suggest delete “ By using the mass continuity equation,”.
  
  In line 33, “typhoon could also produce significant positive ADV” seems opposite to the means of “the decrease of the negative ADV” in line 25.
  
  The legends are much different in fig.2e-h, m/s and not easy to compare.
  
  In line 142, What is the “parcel traces”?
  
  In line 162-164, I am confused by the conclusion of “the TCs-Ozone episodes are not dependent on the enhancement of atmospheric thermal-dynamical stability and reduction of the PBL”, because just in previous sentence in line 160, you say “TC causes descending air motions to force the aerosol particles into a very shallow layer,” . The sentence in line 160 means “the enhancement of atmospheric thermal-dynamical stability and reduction of the PBL”.
  
  In line 177, On the nightàat the night
  
  Define the parameters in table 2.
  
  In section 3.4, the presentation is not concise and I feel it’s not necessary to introduce equations 5, etc. Processes analysis is enough to explain the sustained processes of ozone in daily variations.
  
  Citation: https://doi.org/10.5194/acp-2021-618-RC2
  - AC2: 'Reply on RC2', Ying Li, 19 Jan 2022
    
    We are grateful to the editors and the reviewers for their helpful comments and suggestions. We have revised through the manuscript following the reviewers’ comments and addressed all the critical comments.
    
    Citation: https://doi.org/10.5194/acp-2021-618-AC2
- AC1: 'Reply on RC1', Ying Li, 19 Jan 2022
  
  We are grateful to the editors and the reviewers for their helpful comments and suggestions. We have revised through the manuscript following the reviewers’ comments and addressed all the critical comments.
  
  Citation: https://doi.org/10.5194/acp-2021-618-AC1
EC1:
'Comment on acp-2021-618', Xavier Querol, 07 Dec 2021

EDITOR COMMENT
Dear authors,
Both referees agree on the potential interest of the manuscript on this specific issue of O3 pollution.
Hiwever, they also coincide on the problems of the presentation. Not only the English usage shall be improved but also how results are presented.
Please be sure that you work and indeep review these problems otherwise it can be rejected in the next round of revisions.

Kind regartds

Xavier Querol

Citation: https://doi.org/10.5194/acp-2021-618-EC1
- AC3: 'Reply on EC1', Ying Li, 19 Jan 2022
  
  Dear Editor,
  We are grateful to the editors and the reviewers for their helpful comments and suggestions. We have revised through the manuscript following the reviewers’ comments and addressed all the critical comments.
  We hope that you and the referees will find the changes satisfactory and we are looking forward to hearing from you soon.
  
  Citation: https://doi.org/10.5194/acp-2021-618-AC3

Peer review completion

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

AR by Ying Li on behalf of the Authors (19 Jan 2022) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (19 Jan 2022) by Xavier Querol

RR by Anonymous Referee #1 (23 Jan 2022)

ED: Publish subject to technical corrections (24 Jan 2022) by Xavier Querol

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Short summary

This study finds a new phenomenon of weak wind deepening (WWD) associated with the peripheral circulation of typhoon and gives the influence mechanism of WWD on its contribution to daily variation during sustained ozone episodes. The WWD provides the premise for pollution accumulation in the whole PBL and continued enhancement of ground-level ozone via vertical mixing processes. These findings could benefit the daily daytime ozone forecast in the PRD region and other areas.