DOI: 10.1016/j.atmosenv.2017.04.034
Scopus记录号: 2-s2.0-85018327155
论文题名: Ambient measurements and source apportionment of fossil fuel and biomass burning black carbon in Ontario
作者: Healy R ; M ; , Sofowote U ; , Su Y ; , Debosz J ; , Noble M ; , Jeong C ; -H ; , Wang J ; M ; , Hilker N ; , Evans G ; J ; , Doerksen G ; , Jones K ; , Munoz A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 161 起始页码: 34
结束页码: 47
语种: 英语
英文关键词: Air quality
; Biomass
; Black carbon
; Fossil fuel
; Ontario
; Source apportionment
Scopus关键词: Air quality
; Biomass
; Combustion
; Fuels
; Optical properties
; Pollution
; Roads and streets
; Single crystals
; Transportation
; Ambient concentrations
; Black carbon
; Fossil fuel combustion
; Fuel composition changes
; Implications for futures
; Ontario
; Source apportionment
; Traffic contributions
; Fossil fuels
; black carbon
; fossil fuel
; air quality
; ambient air
; biomass
; biomass burning
; black carbon
; combustion
; concentration (composition)
; environmental policy
; fossil fuel
; measurement method
; pollutant source
; pollution effect
; source apportionment
; absorption
; air quality
; Article
; biomass
; combustion
; commercial phenomena
; comparative study
; Michigan
; New York
; Ohio
; Ontario
; Pennsylvania
; priority journal
; residential area
; seasonal variation
; summer
; winter
; Canada
; Michigan
; New York [United States]
; Ohio
; Ontario [Canada]
; Pennsylvania
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Black carbon (BC) is of significant interest from a human exposure perspective but also due to its impacts as a short-lived climate pollutant. In this study, sources of BC influencing air quality in Ontario, Canada were investigated using nine concurrent Aethalometer datasets collected between June 2015 and May 2016. The sampling sites represent a mix of background and near-road locations. An optical model was used to estimate the relative contributions of fossil fuel combustion and biomass burning to ambient concentrations of BC at every site. The highest annual mean BC concentration was observed at a Toronto highway site, where vehicular traffic was found to be the dominant source. Fossil fuel combustion was the dominant contributor to ambient BC at all sites in every season, while the highest seasonal biomass burning mass contribution (35%) was observed in the winter at a background site with minimal traffic contributions. The mass absorption cross-section of BC was also investigated at two sites, where concurrent thermal/optical elemental carbon data were available, and was found to be similar at both locations. These results are expected to be useful for comparing the optical properties of BC at other near-road environments globally. A strong seasonal dependence was observed for fossil fuel BC at every Ontario site, with mean summer mass concentrations higher than their respective mean winter mass concentrations by up to a factor of two. An increased influence from transboundary fossil fuel BC emissions originating in Michigan, Ohio, Pennsylvania and New York was identified for the summer months. The findings reported here indicate that BC should not be considered as an exclusively local pollutant in future air quality policy decisions. The highest seasonal difference was observed at the highway site, however, suggesting that changes in fuel composition may also play an important role in the seasonality of BC mass concentrations in the near-road environment. This finding has implications for future policies aiming to improve air quality in urban environments where fuel composition changes as a function of season. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82428
Appears in Collections: 气候变化事实与影响
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作者单位: Environmental Monitoring and Reporting Branch, Ontario Ministry of the Environment and Climate Change, Toronto, Canada; Southern Ontario Centre for Atmospheric Aerosol Research, University of Toronto, Toronto, Canada; Air Quality and Climate Change, Metro Vancouver, Burnaby, Canada; Meteorological Service of Canada, Environment and Climate Change Canada, Vancouver, Canada
Recommended Citation:
Healy R,M,, Sofowote U,et al. Ambient measurements and source apportionment of fossil fuel and biomass burning black carbon in Ontario[J]. Atmospheric Environment,2017-01-01,161