气候变化领域集成服务门户(CCPortal): The impact of traffic on air quality in Ireland: Insights from the simultaneous kerbside and suburban monitoring of submicron aerosols

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DOI	10.5194/acp-20-10513-2020
	The impact of traffic on air quality in Ireland: Insights from the simultaneous kerbside and suburban monitoring of submicron aerosols
	Lin C.; Ceburnis D.; Xu W.; Heffernan E.; Hellebust S.; Gallagher J.; Huang R.-J.; O'Dowd C.; Ovadnevaite J.
发表日期	2020
ISSN	1680-7316
起始页码	10513
结束页码	10529
卷号	20 期号:17
英文摘要	To evaluate the impact of traffic on urban air quality, the chemical composition of submicron aerosols (PM1) and sources of organic aerosol (OA) were simultaneously investigated at a kerbside site in the Dublin city center and a residential site in suburban Dublin (∼ 5 km apart) from 4 September to 9 November in 2018. Through the detailed comparison of a 1-week nonheating period from 10 to 17 September and a 1-week heating period from 27 October to 4 November, black carbon (BC) was found to be the most dominant component (38 % 55 % or 5.6 7.1 μg m-3) of PM1 at the kerbside, while OA was the most important (46 % 64 % of PM1 or 1.0 8.1 μg m-3) at the residential site. The daily and weekly cycle of BC at the kerbside during the nonheating period pointed to the major source of vehicular emissions, consistent with that for nitrogen oxides (NOx). However, traffic emissions were found to have a minor impact on air quality at the residential site, due to its distance from traffic sources and the effects of wind speed and wind direction. As a result of vehicular emissions and the street canyon effect, the kerbside increment (from the urban background) ratio of up to 25 : 1 was found for BC during the nonheating period but reduced to 10 : 1 during the heating period due to the additional sources of solid fuel burning impacting the air quality at both sites simultaneously. OA source analysis shows only 16 % 28 % (0.9 1.0 μg m-3; upper limit for traffic due to the additional heating source of hydrocarbon-like OA HOA) of OA at the kerbside associated with vehicular emissions, with higher contributions from cooking (18 % 36 % or 1.2 μg m-3), solid fuel burning (38 % or 2.4 μg m-3; resolved only during the heating period), and oxygenated OA (29 % 37 % or 1.2 1.9 μg m-3). At the residential site, solid fuel burning contributed to 60 % (4.9 μg m-3) of OA during the heating period, while oxygenated OA (OOA) accounted for almost 65 % (0.6 μg m-3) of OA during the nonheating period. Based on simultaneous investigations of PM1 at different urban settings (i.e., residential versus kerbside), this study highlights the temporal and spatial variability of sources within the Dublin city center and the need for additional aerosol characterization studies to improve targeted mitigation solutions for greater impact on urban air quality. Moreover, traffic and residential heating may hold different implications for health and climate, as indicated by the significant increment of BC at the kerbside and the large geographic impact of OA from residential heating at both the kerbside and residential sites. © 2020 Author(s).
语种	英语
scopus关键词	aerosol; air quality; air traffic; chemical composition; nitrogen oxides; street canyon; suburban area; traffic emission; wind direction; wind velocity; Dublin [(CTY) Leinster]; Ireland; Leinster
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/247530
作者单位	School of Physics, Ryan Institute's Centre for Climate and Air Pollution Studies, National University of Ireland Galway, University Road, Galway, H91 CF50, Ireland; State Key Laboratory of Loess and Quaternary Geology, Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi'an, 710061, China; School of Chemistry and Environmental Research Institute, University College Cork, Cork, T23 XE10, Ireland; Department of Civil Structural and Environmental Engineering, Trinity College Dublin, University of Dublin, Dublin, D02 PN40, Ireland
推荐引用方式 GB/T 7714	Lin C.,Ceburnis D.,Xu W.,et al. The impact of traffic on air quality in Ireland: Insights from the simultaneous kerbside and suburban monitoring of submicron aerosols[J],2020,20(17).
APA	Lin C..,Ceburnis D..,Xu W..,Heffernan E..,Hellebust S..,...&Ovadnevaite J..(2020).The impact of traffic on air quality in Ireland: Insights from the simultaneous kerbside and suburban monitoring of submicron aerosols.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(17).
MLA	Lin C.,et al."The impact of traffic on air quality in Ireland: Insights from the simultaneous kerbside and suburban monitoring of submicron aerosols".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.17(2020).