DOI: 10.1002/2014JD021589
论文题名: Organic aerosol emission ratios from the laboratory combustion of biomass fuels
作者: Jolleys M.D. ; Coe H. ; McFiggans G. ; McMeeking G.R. ; Lee T. ; Kreidenweis S.M. ; Collett J.L. ; Jr. ; Sullivan A.P.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 2169897X
出版年: 2014
卷: 119, 期: 22 起始页码: 12850
结束页码: 12871
语种: 英语
英文关键词: aerosol mass spectrometer
; biomass burning
; chamber experiments
; emission ratios
; modified combustion efficiency
; organic aerosol
Scopus关键词: aerosol
; atmospheric plume
; biomass burning
; carbon emission
; combustion
; concentration (composition)
; correlation
; fuel
; mass spectrometry
; oxygenation
; United States
; Pseudotsuga
; Pseudotsuga menziesii
英文摘要: Organic aerosol (OA) emission ratios (ER) have been characterized for 67 burns during the second Fire Laboratory at Missoula Experiment. These fires involved 19 different species representing 6 major fuels, each of which forms an important contribution to the U.S. biomass burning inventory. Average normalized ΔOA/ΔCO ratios show a high degree of variability, both between and within different fuel types and species, typically exceeding differen-ces between separate plumes in ambient measurements. This variability is strongly influenced by highly contrasting ΔOA levels between burns and the increased partitioning of semivolatile organic compounds to the particle phase at high ΔOA concentrations. No correlation across all fires was observed between ΔOA/ΔCO and modified combustion efficiency (MCE), which acts as an indicator of the proportional contributions of flaming and smoldering combustion phases throughout each burn. However, a negative correlation exists with MCE for some coniferous species, most notably Douglas fir, for which there is also an influence from fuel moisture content. Changes in fire efficiency were also shown to dramatically alter emissions for fires with very similar initial conditions. Although the relationship with MCE is variable between species, there is greater consistency with the level of oxygenation in OA. The ratio of the m/z 44 fragment to total OA mass concentration (f44) as measured by aerosol mass spectrometer provides an indication of oxygenation as influenced by combustion processes at source, with ΔOA/ΔCO decreasing with increasing f44 for all fuel types. Inconsistencies in the magnitude of the effects associated with each potential influence on ΔOA/ΔCO emphasize the lack of a single dominant control on fire emissions, and a dependency on both fuel properties and combustion conditions. ©2014. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63020
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science, University of Manchester, Manchester, United Kingdom; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Droplet Measurement Technologies, Boulder, CO, United States; Department of Environmental Science, Hankuk University of Foreign Studies, Yongin-si, South Korea
Recommended Citation:
Jolleys M.D.,Coe H.,McFiggans G.,et al. Organic aerosol emission ratios from the laboratory combustion of biomass fuels[J]. Journal of Geophysical Research Atmospheres,2014-01-01,119(22)