气候变化领域集成服务门户(CCPortal): Small-scale distributions of polycyclic aromatic hydrocarbons in urban areas using geospatial modeling: A case study using the moss Orthotrichum lyellii in Portland, Oregon, U.S.A.

CCPortal

DOI	10.1016/j.atmosenv.2021.118433
	Small-scale distributions of polycyclic aromatic hydrocarbons in urban areas using geospatial modeling: A case study using the moss Orthotrichum lyellii in Portland, Oregon, U.S.A.
	Jovan S.E.; Monleon V.J.; Donovan G.H.; Gatziolis D.; Amacher M.C.
发表日期	2021
ISSN	1352-2310
卷号	256
英文摘要	Polycyclic aromatic hydrocarbons (PAHs) are widespread pollutants that are costly to measure with air quality instruments. We used a spatially balanced sample of an epiphytic moss, Orthotrichum lyellii, to develop fine-scale maps of atmospheric PAHs across residential areas of Portland, Oregon. The unusual abundance of this stress-tolerant species enabled us to systematically collect a large sample (n = 350) on a 1 × 1km grid across the city. This provided the unique opportunity to investigate potential effects of more than 20 factors on PAH concentrations in moss, including emissions sources, tree canopy cover, relative elevation, short-term weather, and nuance of sample collection. We measured 20 PAHs in moss samples and assigned them to 4 groups for analysis based on molecular weight (MW): the Naphthalene, Low, Medium, and High MW groups. Spatial regression models explained a modest amount of variation in PAH concentrations in moss, with spatial structure increasing as MW increased. Motor vehicle emissions were the only PAH source we detected and was highly significant in all models. Deciduous tree cover correlated with lower PAH concentrations in moss for all except the high MW group. Short-term weather and nuance of sample collection, like height on the sampled tree, tree taxonomic family, and whether sample was primarily collected from a branch or bole, had surprisingly large effects on all groups. Overall, results aligned with expectations based on each group's dispersal potential due to MW. All PAH groups were highest over downtown Portland, along major highways, and lowest in parks and outer neighborhoods, although the details varied. Our results supported two common themes in studies directly measuring PAHs: the importance of roads as an emissions source in residential areas, and the potential for trees to reduce atmospheric concentrations. Moreover, the large effects of weather and sampling nuance have critical implications for the design of future studies. © 2021
关键词	Air quality Particulate matter Pollution mapping Spatial regression Traffic emissions Urban airshed
语种	英语
scopus关键词	Air quality; Forestry; Housing; Mineral oils; Naphthalene; Regression analysis; Emission sources; Particulate Matter; Pollution mapping; Polycyclic aromatics; Residential areas; Sample collection; Short term; Spatial regression; Traffic emissions; Urban airshed; Polycyclic aromatic hydrocarbons; polycyclic aromatic hydrocarbon; air quality; concentration (composition); deciduous tree; dispersal; modeling; moss; PAH; pollutant source; taxonomy; traffic emission; urban area; air pollution; air quality; air sampling; Article; atmosphere; biomass; calibration; canopy; controlled study; deciduous plant; environmental factor; environmental planning; environmental policy; environmental temperature; exhaust gas; molecular weight; moss; neighborhood; nonhuman; Oregon; Orthotrichum lyellii; particulate matter; prediction; priority journal; quality control; residential area; spatial regression; urban area; weather; Oregon; United States; Orthotrichum lyellii
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/248409
作者单位	USDA Forest Service, PNW Research Station, 620 SW Main, Suite 502, Portland, OR 97205, United States; USDA Forest Service, PNW Research Station, 3200 SW Jefferson Way, Corvallis, OR 97331, United States; USDA Forest Service (retired), RMRS Research Station, 860 N 1200 E, Logan, UT 84321, United States
推荐引用方式 GB/T 7714	Jovan S.E.,Monleon V.J.,Donovan G.H.,et al. Small-scale distributions of polycyclic aromatic hydrocarbons in urban areas using geospatial modeling: A case study using the moss Orthotrichum lyellii in Portland, Oregon, U.S.A.[J],2021,256.
APA	Jovan S.E.,Monleon V.J.,Donovan G.H.,Gatziolis D.,&Amacher M.C..(2021).Small-scale distributions of polycyclic aromatic hydrocarbons in urban areas using geospatial modeling: A case study using the moss Orthotrichum lyellii in Portland, Oregon, U.S.A..ATMOSPHERIC ENVIRONMENT,256.
MLA	Jovan S.E.,et al."Small-scale distributions of polycyclic aromatic hydrocarbons in urban areas using geospatial modeling: A case study using the moss Orthotrichum lyellii in Portland, Oregon, U.S.A.".ATMOSPHERIC ENVIRONMENT 256(2021).