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© Author(s) 2020. This work is distributed under
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© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  17 Aug 2020

17 Aug 2020

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This preprint is currently under review for the journal ACP.

Emission inventory of air pollutants and chemical speciation for specific anthropogenic sources based on local measurements in the Yangtze River Delta region, China

Jingyu An1,2, Yiwei Huang1, Cheng Huang1, Xin Wang3, Rusha Yan1, Qian Wang1, Hongli Wang1, Sheng'ao Jing1, Yan Zhang2, Yiming Liu2, A. J. Yuan Chen4, Chang Xu1, Liping Qiao1, Min Zhou1, Shuhui Zhu1, Qingyao Hu1, Jun Lu1, and Changhong Chen1 Jingyu An et al.
  • 1State Environmental Protection Key Laboratory of the Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China
  • 2Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
  • 3China National Environmental Monitoring Centre, Beijing 100012, China
  • 4University of Southern California, Los Angeles, CA 90089, USA

Abstract. A high-resolution air pollutant emission inventory in the Yangtze River Delta (YRD) region was updated for the year 2017 using emission factors and chemical speciation mainly from local measurements in this study. The inventory includes 424 NMVOC species and 43 PM2.5 species, which can be subdivided into 259 specific source categories. The total emissions of SO2, NOx, CO, NMVOCs, PM10, PM2.5, and NH3 in the YRD region in 2017 are 1,552, 3,235, 38,507, 4,875, 3,770, 1,597, and 2,467 Gg, respectively. SO2 and CO emissions are mainly from boilers, accounting for 49 % and 73 %, respectively. Mobile sources dominate the NOx emissions and contribute 57 % of the total. VOC emissions mainly come from industrial sources, occupying 61 %. Dust sources take up to 55 % and 28 % of PM10 and PM2.5 emissions, respectively. Agricultural sources account for 91 % of NH3 emissions. Major PM2.5 species are OC, Ca, Si, PSO4 and EC, accounting for 9.0 %, 7.0 %, 6.4 %, 4.6 % and 4.3 % of total PM2.5 emissions. The main species of VOCs are aromatics, accounting for 25.3 %. OVOCs contribute 21.9 % of total VOC emissions. Toluene has the highest comprehensive contribution to ozone and SOA formation potentials, and the others are 1,2,4-trimethylbenzene, m,p-xylene, propylene, ethene, o-xylene, ethylbenzene and so on. Industrial process and solvent use sources are the main sources of ozone and SOA formation potential, followed by motor vehicles. Among industrial sources, chemical manufacturing, rubber & plastic manufacturing, appliance manufacturing and textile have made relatively outstanding contributions. The inventory can provide scientific guidance for future joint control of air pollutants in the YRD region, China.

Jingyu An et al.

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Gridded emissions of air pollutants for the Yangtze River Delta, China Jingyu An and Cheng Huang

Jingyu An et al.


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Short summary
This study established a 4 × 4 km high-resolved anthropogenic emission inventory in the Yangtze River Delta region, China for the year 2017 based on local-measured emission factors and source profiles. There are high-intensity NOx and NMVOC species emissions in the eastern areas of the region. Toluene, 1,2,4-trimethylbenzene, m,p-xylene, propylene, ethylene, o-xylene, as well as OVOCs from industry and mobile sources have the highest comprehensive potentials on ozone and SOA formation.
This study established a 4 × 4 km high-resolved anthropogenic emission inventory in the Yangtze...