Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.668 IF 5.668
  • IF 5-year value: 6.201 IF 5-year
    6.201
  • CiteScore value: 6.13 CiteScore
    6.13
  • SNIP value: 1.633 SNIP 1.633
  • IPP value: 5.91 IPP 5.91
  • SJR value: 2.938 SJR 2.938
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 174 Scimago H
    index 174
  • h5-index value: 87 h5-index 87
Discussion papers
https://doi.org/10.5194/acp-2019-758
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2019-758
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 27 Nov 2019

Submitted as: research article | 27 Nov 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

Heavy air pollution with the unique “non-stagnant” atmospheric boundary layer in the Yangtze River Middle Basin aggravated by regional transport of PM2.5 over China

Chao Yu1,2, Tianliang Zhao1, Yongqing Bai3, Lei Zhang1,4, Xingna Yu1, Shaofei Kong5, Jinhai He1, Chunguang Cui3, Jie Yang1, Yinchang You1, Guoxu Ma1, Ming Wu1, and Jiacheng Chang1 Chao Yu et al.
  • 1Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing, University of Information Science and Technology, Nanjing 210044, China
  • 2Southwest Electric Power Design Institute Co., Ltd of China Power Engineering Consulting Group, Chengdu, 610021, China
  • 3Institute of Heavy Rain, China Meteorological Administration, Wuhan, 430205, China
  • 4Chengdu Academy of Environmental Sciences, Chengdu, 610031, China
  • 5Department of Atmospheric Sciences, School of Environmental Studies, China University of Geosciences (Wuhan), 430074, Wuhan, China

Abstract. Regional transport of air pollutants controlled by both emission sources and meteorological factors results in a complex source-receptor relationship of air pollution change. Wuhan, a metropolis in the Yangtze River Middle Basin (YRMB) of central China experienced heavy air pollution characterized by excessive PM2.5 concentrations reaching 471.1 μg m−3 in January 2016. In order to investigate the regional transport of PM2.5 over China and the meteorological impact on wintertime air pollution in the YRMB area, observational meteorological and other relevant environmental data from January 2016 were analyzed. Our analysis presented the noteworthy cases of heavy PM2.5 pollution in the YRMB area with the unique “non-stagnant” meteorological conditions of strong northerly winds, no temperature inversion and additional unstable structures in the atmospheric boundary layer. This unique set of conditions differed from the stagnant meteorological conditions characterized by near-surface weak winds, air temperature inversion, and stable structure in the boundary layer observed in heavy air pollution over most regions in China. The regional transport of PM2.5 over central-eastern China aggravated PM2.5 levels present in the YRMB area, thus demonstrating the source-receptor relationship between the originating air pollution regions in central-eastern China and the receiving YRMB regions. Furthermore, a backward trajectory simulation using FLEXPART-WRF to integrate the air pollutant emission inventory over China was used to explore the patterns of regional transport of PM2.5 governed by the strong northerly winds in the cold air activity of the East Asian winter monsoon over central-eastern China, which contributes markedly to the heavy PM2.5 pollution in the YRMB area. It was estimated that the regional transport of PM2.5 of non-local air pollutant emissions could contribute more than 65 % of the PM2.5 concentrations to the heavy air pollution in the YRMB region during the study period, revealing the importance of the regional transport of air pollutants over central-eastern China in the formation of heavy air pollution over the YRMB region.

Chao Yu et al.
Interactive discussion
Status: open (until 22 Jan 2020)
Status: open (until 22 Jan 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Chao Yu et al.
Viewed  
Total article views: 107 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
81 22 4 107 4 1 4
  • HTML: 81
  • PDF: 22
  • XML: 4
  • Total: 107
  • Supplement: 4
  • BibTeX: 1
  • EndNote: 4
Views and downloads (calculated since 27 Nov 2019)
Cumulative views and downloads (calculated since 27 Nov 2019)
Viewed (geographical distribution)  
Total article views: 176 (including HTML, PDF, and XML) Thereof 173 with geography defined and 3 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 07 Dec 2019
Publications Copernicus
Download
Short summary
This study investigated the ambient PM2.5 variations over Wuhan, a typical urban YRMB region in central-eastern China in January 2016 through analysis of observational data of environment and meteorology, as well as via FLEXPART-WRF simulation, it is revealed heavy air pollution with the unique “non-stagnant” atmospheric boundary layer in the YRMB region aggravated by regional transport of PM2.5 over central and eastern China.
This study investigated the ambient PM2.5 variations over Wuhan, a typical urban YRMB region in...
Citation