Jialin Li1, Juzhen Cai This email address is being protected from spambots. You need JavaScript enabled to view it.3, Houfeng Liu5, Xiao Han1,4, Yongfu Xu1,4, Xiaofang Cai6, Meigen Zhang This email address is being protected from spambots. You need JavaScript enabled to view it.1,2,4

1 State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
2 Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
3 Zhejiang Climate Center, Hangzhou 310017, China
4 University of Chinese Academy of Sciences, Beijing 100049, China
5 School of Geography and Environment, Shandong Normal University, Jinan 250358, China
6 Taiyuan Meteorological Service, Taiyuan 030082, China


Received: March 22, 2022
Revised: June 21, 2022
Accepted: July 29, 2022

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.220139  

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Cite this article:

Li, J., Cai, J., Liu, H., Han, X., Xu, Y., Cai, X., Zhang, M. (2022). Model Analyses of Changes in Spring Surface Ozone Concentrations over Shandong Province in the Period of 2014‒2017. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.220139


HIGHLIGHTS

  • O3 in spring of Shandong Province increased.
  • Differences of meteorology contributed more and more to changes in O3 of spring.
  • Changes in NOx emissions were related to the variations in O3 concentrations.
 

ABSTRACT


The concentrations of surface ozone (O3) in eastern China have increased significantly in recent years, resulting in the earlier appearance of more serious O3 pollution. Measurements at 14 stations in Shandong Province showed that the monthly mean O3 concentrations in the late spring (May) increased by 22.2 µg m−3 from 2014 to 2017. To investigate the reasons of the increase of O3 in springtime from 2014 to 2017, the changes of O3 concentrations due to meteorological conditions and emissions in May were studied based on ambient measurements and simulations with the RAMS-CMAQ modeling system. By analyzing the observed data, it was found that the variations in wind field were conducive to the accumulation of O3, while the effects of other meteorological parameters on O3 concentrations were different at the same site between years. Further to perform a series of simulations with only the meteorological conditions changed in May from 2014 to 2017, the results showed that the effects of variations in meteorological conditions had become more and more important in the changes of O3 concentrations in May between years, especially the factors that affected the photochemical generation of O3. For example, the percentage of the sites where the changes of O3 concentrations were dominated by the variations of the meteorological conditions increased from 28.6% to 78.6% over the region in May between years. Besides, the changes in NOx emissions had a close relationship with the variations in O3 concentrations when the changes of O3 were dominated by the emission variations.


Keywords: Ozone, Meteorological conditions, Emissions effects, RAMS-CMAQ, Shandong




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