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DOI	10.1016/j.atmosenv.2020.117584
	Impacts of urban roadside forest patches on NO2 concentrations
	Yli-Pelkonen V.; Viippola V.; Kotze D.J.; Setälä H.
发表日期	2020
ISSN	1352-2310
卷号	232
英文摘要	Although it is commonly believed that trees can improve air quality, recent studies have shown that such pollution mitigation can be negligible – or that tree canopies can even increase pollutant concentrations near their sources compared to adjacent treeless areas. We explored the impacts of urban roadside forest patches on the concentrations of nitrogen dioxide in summer and winter in the Helsinki Metropolitan Area, Finland, and especially investigated if canopy cover can result in increased concentrations of NO2 below the canopy. Our results, however, did not show significantly higher – or lower – NO2 concentrations underneath tree canopies compared to levels above canopies. Neither did NO2 levels at the below-canopy sampling height differ significantly between forest patches and adjacent open, treeless areas. The lack of a canopy effect may derive from the rather small size of the forest patches, and – compared to previous studies with similar design – divergent tree species composition forming a dense canopy structure. Our results corroborate previous studies that the potential ecosystem services offered by urban near-road forests are more likely due to benefits other than those related to the removal of air pollutants. © 2020 Elsevier Ltd
英文关键词	Air pollutants; Nature-based solutions; Nitrogen dioxide; Roads; Tree canopy; Urban forest
语种	英语
scopus关键词	Air pollution control; Air quality; Ecosystems; Nitrogen oxides; Roadsides; Ecosystem services; Metropolitan area; Nitrogen dioxides; Pollutant concentration; Pollution mitigation; Sampling heights; Tree species composition; Urban roadsides; Forestry; nitrogen dioxide; air quality; canopy architecture; metropolitan area; nitrogen dioxide; patch dynamics; pollution effect; roadside environment; urban pollution; air pollutant; Article; canopy; controlled study; deciduous plant; Finland; forest; habitat; priority journal; species composition; summer; urban area; winter; Finland; Helsinki; Varsinais-Suomi
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129474
作者单位	Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, P.O. Box 65FI-00014, Finland; Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, Niemenkatu 73, Lahti, FI-15140, Finland
推荐引用方式 GB/T 7714	Yli-Pelkonen V.,Viippola V.,Kotze D.J.,et al. Impacts of urban roadside forest patches on NO2 concentrations[J],2020,232.
APA	Yli-Pelkonen V.,Viippola V.,Kotze D.J.,&Setälä H..(2020).Impacts of urban roadside forest patches on NO2 concentrations.Atmospheric Environment,232.
MLA	Yli-Pelkonen V.,et al."Impacts of urban roadside forest patches on NO2 concentrations".Atmospheric Environment 232(2020).