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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
doi:10.5194/acp-2017-114
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
01 Mar 2017
Review status
This discussion paper is under review for the journal Atmospheric Chemistry and Physics (ACP).
Impacts of emission reduction and meteorological conditions on air quality improvement during the 2014 Youth Olympic Games in Nanjing, China
Qian Huang1, Tijian Wang1, Pulong Chen1, Xiaoxian Huang2, Jialei Zhu3, and Bingliang Zhuang1 1School of Atmospheric Sciences, CMA-NJU Joint Laboratory for Climate Prediction Studies, Jiangsu Collaborative Innovation Center for Climate Change, Nanjing University, Nanjing, 210023, China
2College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China
3Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, 48109, USA
Abstract. As the holding city of the 2nd Youth Olympic Games (YOG), Nanjing is highly industrialized and urbanized facing with several air pollution issues. In order to ensure better air quality during the event, the local government took great efforts to control the pollution emissions. However, air quality can still be affected by meteorology. In this paper, the influences of meteorological factors and emission reductions were investigated using observational data and numerical simulations with WRF/CMAQ. During the YOG (August, 2014), the concentration of SO2, NO2, PM10, PM2.5, CO and O3 was 11.6 μg/m3, 34.0 μg/m3, 57.8 μg/m3, 39.4 μg/m3, 0.9 μg/m3, and 38.8 μg/m3, respectively, which were under China National Ambient Air Quality Standard. However, simulation showed that the weather conditions such as weaker winds during the holding time were adverse for better air quality, and raised SO2, NO2, PM10, PM2.5 and CO by 17.5 %, 16.9 %, 19.0 %, 19.5 %, 7.8 % and 0.8 %, respectively. Taking account of local emission abatement only, SO2, NO2, PM10, PM2.5 and CO was decreased by 24.6 %, 12.1 %, 14.5 %, 6.9 % and 7.2 %, respectively. Consequently, stringent emission control measures can reduce the concentrations of air pollutants in short term, and emission reduction is the dominant factor of the air quality improvement during the YOG, which has set up a good example in air protection for important social events.

Citation: Huang, Q., Wang, T., Chen, P., Huang, X., Zhu, J., and Zhuang, B.: Impacts of emission reduction and meteorological conditions on air quality improvement during the 2014 Youth Olympic Games in Nanjing, China, Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2017-114, in review, 2017.
Qian Huang et al.
Qian Huang et al.
Qian Huang et al.

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Short summary
This paper investigate the decisive factor contributing to the improvement of the air quality of Nanjing, China, during the 2th Youth Olympic Games, held in August, 2014. The interesting finding is that meteorological factors are not beneficial for better air quality during YOG. However, emission reduction play a more important role, which suggest that emission reduction is an effective way to cut down air pollution for social events.
This paper investigate the decisive factor contributing to the improvement of the air quality of...
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