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Impact of the Emission Control of Diesel Vehicles on Black Carbon (BC) Concentrations over China

1
Institute of Earth Environment, Key Laboratory of Aerosol Chemistry and Physics, SKLLQG, Chinese Academy of Sciences, Xi’an 710061, China
2
Institute of Urban Environment, Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
3
Shanghai Key Laboratory of Meteorology and Health, Shanghai 200030, China
4
State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
5
University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(7), 696; https://doi.org/10.3390/atmos11070696
Received: 18 April 2020 / Revised: 26 June 2020 / Accepted: 28 June 2020 / Published: 30 June 2020
(This article belongs to the Section Aerosols)
In order to reduce black carbon (BC) emissions from diesel vehicles, a regional atmospheric chemistry model (WRF-Chem) was used to investigate the effects of installing a high-efficiency device for vehicle exhaust control, a diesel particulate filter (DPF), on diesel vehicles in China. To reduce the uncertainty of estimation, three sensitivity experiments were designed and conducted for different emission scenarios. The first experiment uses the standard black carbon emissions of diesel vehicles without engaging in any emission control actions (referred to as CTRL), and the other two experiments were conducted using different DPF devices to reduce BC emissions by 65% (CASE1) and 39% (CASE2), respectively. The results show that the model simulation reasonably represents the measured BC concentrations. The highest BC concentrations occurred in large cities of the North China Plain (NCP) and present important seasonal variations. The results suggest that the reduction in diesel vehicle emissions has great benefits for reducing BC pollution not only in winter but also in other seasons. Sensitivity studies show that in CASE1, the average BC concentrations decreased about ~6% in January and by more than 10% in the other seasons. The greatest reduction exceeded 50%. In CASE2, the average BC concentrations decreased by about ~3.5% in January and by more than 7% in the other seasons. This study suggests that adding DPF to a diesel vehicle can have a significant influence on reducing BC concentrations in China. Thus, this study provides a practical basis by which diesel vehicle emissions can be reduced. View Full-Text
Keywords: black carbon reduction; diesel vehicles; WRF-Chem model black carbon reduction; diesel vehicles; WRF-Chem model
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Zhou, J.; Tie, X.; Yu, Y.; Zhao, S.; Li, G.; Liu, S.; Zhang, T.; Dai, W. Impact of the Emission Control of Diesel Vehicles on Black Carbon (BC) Concentrations over China. Atmosphere 2020, 11, 696.

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