Impacts of different vehicle emissions on ozone levels in Beijing: Insights into source contributions and formation processes.

Autor: Cao J; SKL-ESPC & SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing, China., Liu J; Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, China. Electronic address: liujun@ustb.edu.cn., Cheng Y; Beijing Transport Institute, Beijing, China. Electronic address: 155219550@qq.com., Ai S; SKL-ESPC & SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing, China., Li F; SKL-ESPC & SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing, China., Xue T; Institute of Reproductive and Child Health, National Health Commission Key Laboratory of Reproductive Health / Department of Epidemiology and Biostatistics, Ministry of Education Key Laboratory of Epidemiology of Major Diseases, School of Public Health, Peking University Health Science Centre, Beijing, China; State Environmental Protection Key Laboratory of Atmospheric Exposure, and Health Risk Management and Center for Environment and Health, Peking University, Beijing, China., Zhang Q; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, China., Zhu T; SKL-ESPC & SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing, China; State Environmental Protection Key Laboratory of Atmospheric Exposure, and Health Risk Management and Center for Environment and Health, Peking University, Beijing, China. Electronic address: tzhu@pku.edu.cn.
Jazyk: angličtina
Zdroj: Environment international [Environ Int] 2024 Sep; Vol. 191, pp. 109002. Date of Electronic Publication: 2024 Sep 07.
DOI: 10.1016/j.envint.2024.109002
Abstrakt: Beijing, with the highest number of motor vehicles in China, significantly contributes to O 3 pollution through substantial NO x and VOC emissions in the on-road transportation sector. Understanding the unique impact of emissions from different vehicle types on O 3 levels is crucial for developing targeted strategies for O 3 pollution. This study applied the Community Multiscale Air Quality Modeling System (CMAQ) to comprehensively investigate the impacts of emissions from different vehicle types on O 3 levels in various regions of Beijing and to provide valuable insights into source contributions and formation processes. The results revealed that various vehicle types exhibited different spatial-temporal emission patterns, with medium-heavy duty trucks (HDT) and mini-light passenger vehicles (LDPV) identified as the primary contributors to NO x (36.1 %) and VOC (57.6 %) emissions. Using the Integrated Source Apportionment Method (ISAM) coupled in CMAQ, we found the total vehicle emissions contributed to over 20 % of daily maximum 8-h average O 3 (MDA8 O 3 ) concentration, ranked as the second largest contributor after regional transport. Contributions to O 3 formation from LDPV and medium-large passenger vehicles (MDPV) were 2.6-4.0 and 4.2-6.8 ppb and mainly concentrated in urban areas, while the contributions from mini-light duty trucks (LDT) and HDT were 3.5-4.8 and 3.7-6.2 ppb and mainly concentrated in suburban areas. Through scenario analysis that removed emissions from specific types of vehicles, we found removing LDPV emissions led to decreases in daytime O 3 concentration by 0.3-3.8 ppb. In contrast, removing MDPV emissions led to notable O 3 increases by 4.0-11.8 ppb at rush hours. Removing LDT and HDT emissions resulted in 0.6-8.0 ppb increases in nocturnal O 3 concentrations while 0.8-2.0 ppb decreases during the afternoon. This research highlights the necessity of tailoring control strategies for different vehicle types to effectively reduce O 3 levels in Beijing and provides useful information for decision-makers to formulate effective measures of vehicle management in the future.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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