气候变化领域集成服务门户(CCPortal): Contribution of traffic-originated nanoparticle emissions to regional and local aerosol levels

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DOI	10.5194/acp-22-1131-2022
	Contribution of traffic-originated nanoparticle emissions to regional and local aerosol levels
	Olin, Miska; Patoulias, David; Kuuluvainen, Heino; Niemi, Jarkko, V; Ronkko, Topi; Pandis, Spyros N.; Riipinen, Ilona; Dal Maso, Miikka
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	1131
结束页码	1148
卷号	22 期号:2 页码:18
英文摘要	Sub-50 nm particles originating from traffic emissions pose risks to human health due to their high lung deposition efficiency and potentially harmful chemical composition. We present a modeling study using an updated European Aerosol Cloud Climate and Air Quality Interactions (EUCAARI) number emission inventory, incorporating a more realistic, empirically justified particle size distribution (PSD) for sub-50 nm particles from road traffic as compared with the previous version. We present experimental PSDs and CO2 concentrations, measured in a highly trafficked street canyon in Helsinki, Finland, as an emission factor particle size distribution (EFPSD), which was then used in updating the EUCAARI inventory. We applied the updated inventory in a simulation using the regional chemical transport model PMCAMx-UF over Europe for May 2008. This was done to test the effect of updated emissions at regional and local scales, particularly in comparison with atmospheric new particle formation (NPF). Updating the inventory increased the simulated average total particle number concentrations by only 1 %, although the total particle number emissions were increased to a 3-fold level. The concentrations increased up to 11 % when only 1.3-3 nm sized particles (nanocluster aerosol, NCA) were considered. These values indicate that the effect of updating overall is insignificant at a regional scale during this photochemically active period. During this period, the fraction of the total particle number originating from atmospheric NPF processes was 91 %; thus, these simulations give a lower limit for the contribution of traffic to the aerosol levels. Nevertheless, the situation is different when examining the effect of the update closer spatially or temporally or when focusing on the chemical composition or the origin of the particles. For example, the daily average NCA concentrations increased by a factor of several hundred or thousand in some locations on certain days. Overall, the most significant effects - reaching several orders of magnitude - from updating the inventory are observed when examining specific particle sizes (especially 7-20 nm), particle components, and specific urban areas. While the model still has a tendency to predict more sub-50 nm particles compared to the observations, the most notable underestimations in the concentrations of sub-10 nm particles are now overcome. Additionally, the simulated distributions now agree better with the data observed at locations with high traffic densities. The findings of this study highlight the need to consider emissions, PSDs, and composition of sub-50 nm particles from road traffic in studies focusing on urban air quality. Updating this emission source brings the simulated aerosol levels, particularly in urban locations, closer to observations, which highlights its importance for calculations of human exposure to nanoparticles.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000748746300001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273310
作者单位	Tampere University; University of Patras; Foundation for Research & Technology - Hellas (FORTH); Institute of Chemical Engineering Sciences (ICE-HT); Stockholm University; Stockholm University
推荐引用方式 GB/T 7714	Olin, Miska,Patoulias, David,Kuuluvainen, Heino,et al. Contribution of traffic-originated nanoparticle emissions to regional and local aerosol levels[J],2022,22(2):18.
APA	Olin, Miska.,Patoulias, David.,Kuuluvainen, Heino.,Niemi, Jarkko, V.,Ronkko, Topi.,...&Dal Maso, Miikka.(2022).Contribution of traffic-originated nanoparticle emissions to regional and local aerosol levels.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(2),18.
MLA	Olin, Miska,et al."Contribution of traffic-originated nanoparticle emissions to regional and local aerosol levels".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.2(2022):18.