DOI: 10.1016/j.atmosenv.2018.01.013
Scopus记录号: 2-s2.0-85041473849
论文题名: Impacts of a large boreal wildfire on ground level atmospheric concentrations of PAHs, VOCs and ozone
作者: Wentworth G ; R ; , Aklilu Y ; -A ; , Landis M ; S ; , Hsu Y ; -M
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 178 起始页码: 19
结束页码: 30
语种: 英语
英文关键词: Air quality
; Fort McMurray
; Ozone
; PAH
; VOC
; Wildfire
Scopus关键词: Acetaldehyde
; Air quality
; Aromatic hydrocarbons
; Fossil fuels
; Fuels
; Oil fields
; Oil sands
; Ozone
; Polycyclic aromatic hydrocarbons
; Volatile organic compounds
; Air quality monitoring networks
; Atmospheric concentration
; Fossil fuel combustion
; McMurray
; Polycyclic aromatic hydrocarbon (PAH)
; Regional air quality
; Volatile organic compound (VOC)
; Wildfire
; Fires
; acetaldehyde
; benzene
; fossil fuel
; methanol
; ozone
; polycyclic aromatic hydrocarbon
; volatile organic compound
; acetaldehyde
; air quality
; benzene
; biomass burning
; combustion
; concentration (composition)
; fossil fuel
; ozone
; PAH
; volatile organic compound
; wildfire
; air monitoring
; air quality
; Article
; atmospheric deposition
; biomass
; burn
; combustion
; plume
; priority journal
; wildfire
; Alberta
; Athabasca Oil Sands
; Canada
; Edmonton
; Fort McMurray
; Lethbridge
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: During May 2016 a very large boreal wildfire burned throughout the Athabasca Oil Sands Region (AOSR) in central Canada, and in close proximity to an extensive air quality monitoring network. This study examines speciated 24-h integrated polycyclic aromatic hydrocarbon (PAH) and volatile organic compound (VOC) measurements collected every sixth day at four and seven sites, respectively, from May to August 2016. The sum of PAHs (ΣPAH) was on average 17 times higher in fire-influenced samples (852 ng m−3, n = 8), relative to non-fire influenced samples (50 ng m−3, n = 64). Diagnostic PAH ratios in fire-influenced samples were indicative of a biomass burning source, whereas ratios in June to August samples showed additional influence from petrogenic and fossil fuel combustion. The average increase in the sum of VOCs (ΣVOC) was minor by comparison: 63 ppbv for fire-influenced samples (n = 16) versus 46 ppbv for non-fire samples (n = 90). The samples collected on August 16th and 22nd had large ΣVOC concentrations at all sites (average of 123 ppbv) that were unrelated to wildfire emissions, and composed primarily of acetaldehyde and methanol suggesting a photochemically aged air mass. Normalized excess enhancement ratios (ERs) were calculated for 20 VOCs and 23 PAHs for three fire influenced samples, and the former were generally consistent with previous observations. To our knowledge, this is the first study to report ER measurements for a number of VOCs and PAHs in fresh North American boreal wildfire plumes. During May the aged wildfire plume intercepted the cities of Edmonton (∼380 km south) or Lethbridge (∼790 km south) on four separate occasions. No enhancement in ground-level ozone (O3) was observed in these aged plumes despite an assumed increase in O3 precursors. In the AOSR, the only daily-averaged VOCs which approached or exceeded the hourly Alberta Ambient Air Quality Objectives (AAAQOs) were benzene (during the fire) and acetaldehyde (on August 16th and 22nd). Implications for local and regional air quality as well as suggestions for supplemental air monitoring during future boreal fires, are also discussed. © 2018 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82990
Appears in Collections: 气候变化事实与影响
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作者单位: Environmental Monitoring and Science Division, Alberta Environment and Parks, 10th Floor 9888 Jasper Ave. NW, Edmonton, AB, Canada; US Environmental Protection Agency, Office of Research and Development, Research Triangle ParkNC, United States; Wood Buffalo Environmental Association, 100-330 Thickwood Blvd., Fort McMurray, AB, Canada
Recommended Citation:
Wentworth G,R,, Aklilu Y,et al. Impacts of a large boreal wildfire on ground level atmospheric concentrations of PAHs, VOCs and ozone[J]. Atmospheric Environment,2018-01-01,178