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Sustainability
Volume 15
Issue 4
10.3390/su15043281
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Article
Peer-Review Record

Combined Effects of Photochemical Processes, Pollutant Sources and Urban Configuration on Photochemical Pollutant Concentrations

Sustainability 2023, 15(4), 3281; https://doi.org/10.3390/su15043281
by Jie Liang 1,2,†, Liyue Zeng 1,2,†, Shengzhen Zhou 1,2,†, Xuemei Wang 3, Jiajia Hua 4, Xuelin Zhang 1,2, Zhongli Gu 5 and Lejian He 6,*
Reviewer 1: Anonymous
Reviewer 2:
Abimbola E. Oluwalana
Sustainability 2023, 15(4), 3281; https://doi.org/10.3390/su15043281
Submission received: 12 January 2023 / Revised: 3 February 2023 / Accepted: 4 February 2023 / Published: 10 February 2023
(This article belongs to the Special Issue Urban Climate and Health)

Round 1

Reviewer 1 Report

This paper investigated the combined effects of traffic emissions, dynamical processes, and chemical transformation on photochemical pollutants (NO, NO2 and O3) in 3D urban areas by using the MUNICH model. Some problems should be solved before publication.

Major problems:

1.      This paper contains a lot of equations, a nomenclature is needed.

2.      Page 6 line 235-237, “Meteorological data including wind profile, boundary height and friction velocity was provided by WRF with a grid resolution of 1km.”, the detailed meteorological data should be shown in the paper.

3.      In section 2.4, this paper only validated the concentrations, how about the airflow fields in the street canyons, why are they not necessary to be validated?

4.      Page 9 line 315, the lowest level of NO2 region-mean concentration in a day actually occurred around 5:00 from figure 3(a).

5.      Page 10 line 327-330, the reduction percentages of these pollutants are not shown clearly in figure 4. Figure 4 can only demonstrate the trends of the variations. It should be modified in a better way.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

Liang et al reported on “Combined effects of photochemical processes, pollutant sources and urban configuration on photochemical pollutant concentrations” In the research, the authors used real traffic and street data from a region in Guangzhou along with a simplified urban network of intersecting canyons and highways (MUNICH) street network model that includes complex photochemical reactions to examine the combined effects of combined effects of pollutant sources, urban configuration, and chemical transformation on photochemical pollution. Their models have demonstrated that lowering traffic-related emissions generally reduces NOx pollution while increasing O3 concentration. Pollution from O3 can be efficiently reduced by reducing VOC emissions. In addition, the authors were able to explain how building heights and arrangements may result in some air pollution hotspots. I recommend the manuscript be accepted in it present format.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

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