The effect of cross-regional transport on ozone and particulate matter pollution in China: A review of methodology and current knowledge

作者：Kun Qu, Yu Yan, Xuesong Wang, Xipeng Jin, Mihalis Vrekoussis, Maria Kanakidou, Guy Brasseur, Tingkun Lin, Teng Xiao, Xuhui Cai, Limin Zeng, Yuanhang Zhang · 发表于：The Science of The Total Environment · 年份：2024 · DOI：10.1016/j.scitotenv.2024.174196 · 被引用次数：34 · 研究领域：Air Quality and Health Impacts、Atmospheric chemistry and aerosols、Vehicle emissions and performance

China is currently one of the countries impacted by severe atmospheric ozone (O3) and particulate matter (PM) pollution. Due to their moderately long lifetimes, O3 and PM can be transported over long distances, cross the boundaries of source regions and contribute to air pollution in other regions. The reported contributions of cross-regional transport (CRT) to O3 and fine PM (PM2.5) concentrations often exceed those of local emissions in the major regions of China, highlighting the important role of CRT in regional air pollution. Therefore, further improvement of air quality in China requires more joint efforts among regions to ensure a proper reduction in emissions while accounting for the influence of CRT. This review summarizes the methodologies employed to assess the influence of CRT on O3 and PM pollution as well as current knowledge of CRT influence in China. Quantifying CRT contributions in proportion to O3 and PM levels and studying detailed CRT processes of O3, PM and precursors can be both based on targeted observations and/or model simulations. Reported publications indicate that CRT contributes by 40–80 % to O3 and by 10–70 % to PM2.5 in various regions of China. These contributions exhibit notable spatiotemporal variations, with differences in meteorological conditions and/or emissions often serving as main drivers of such variations. Based on trajectory-based methods, transport pathways contributing to O3 and PM pollution in major regions of China have been rev...