DOI: 10.1016/j.atmosenv.2014.03.026
Scopus记录号: 2-s2.0-84907596552
论文题名: Physicochemical characterization of smoke aerosol during large-scale wildfires: Extreme event of August 2010 in Moscow
作者: Popovicheva O ; , Kistler M ; , Kireeva E ; , Persiantseva N ; , Timofeev M ; , Kopeikin V ; , Kasper-Giebl A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 96 起始页码: 405
结束页码: 414
语种: 英语
英文关键词: Aerosol chemistry
; Biomass burning
; Multicomponent smoke structure
; Physico-chemical characterization
; Smoke event
Scopus关键词: Aerosols
; Air entrainment
; Air quality
; Biomass
; Calcium carbonate
; Carbon
; Carbonyl compounds
; Characterization
; Deforestation
; Degradation
; Fires
; Fly ash
; Fourier transform infrared spectroscopy
; Particles (particulate matter)
; Sulfur compounds
; Aerosol chemistry
; Biomass-burning
; Multi-component structures
; Multicomponents
; Organic functionalities
; Physico-chemical characterization
; Secondary organic aerosols
; Thermal-optical analysis
; Smoke
; aliphatic compound
; ammonia
; aromatic carboxylic acid
; calcium sulfate
; carbohydrate
; carbon
; carbonic acid derivative
; carbonyl derivative
; element
; hydroxyl group
; inorganic compound
; ion
; levoglucosan
; nitro derivative
; organic compound
; sulfate
; tracer
; aerosol
; air quality
; ammonium
; atmospheric chemistry
; biomass burning
; coniferous forest
; extreme event
; fly ash
; FTIR spectroscopy
; ionic composition
; megacity
; smoke
; wildfire
; aerosol
; air pollution
; air quality
; ambient air
; article
; biomass
; burn
; electron microscopy
; fire
; Fourier transform infrared photoacoustic spectroscopy
; gas analysis
; ion pair chromatography
; priority journal
; Russian Federation
; secondary organic aerosol
; smoke
; thermodynamics
; urban area
; Aerosols
; Air Quality
; Biomass
; Calcium Carbonate
; Carbon
; Combustion
; Deforestation
; Degradation
; Fires
; Fly Ash
; Particles
; Smoke
; Sulfur Compounds
; Moscow [Russian Federation]
; Russian Federation
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: Enhancement of biomass burning-related research is essential for the assessment of large-scale wildfires impact on pollution at regional and global scale. Starting since 6 August 2010 Moscow was covered with thick smoke of unusually high PM10 and BC concentrations, considerably affected by huge forest and peat fires around megacity. This work presents the first comprehensive physico-chemical characterization of aerosols during extreme smoke event in Moscow in August 2010. Sampling was performed in the Moscow center and suburb as well as one year later, in August 2011 during a period when no biomass burning was observed. Small-scale experimental fires of regional biomass were conducted in the Moscow region. Carbon content, functionalities of organic/inorganic compounds, tracers of biomass burning (anhydrosaccharides), ionic composition, and structure of smoke were analyzed by thermal-optical analysis, FTIR spectroscopy, liquid and ion chromatography, and electron microscopy. Carbonaceous aerosol in August 2010 was dominated by organic species with elemental carbon (EC) as minor component. High average OC/EC near 27.4 is found, comparable to smoke of regional biomass smoldering fire, and exceeded 3 times the value observed in August 2011. Organic functionalities of Moscow smoke aerosols were hydroxyl, aliphatic, aromatic, acid and non-acid carbonyl, and nitro compound groups, almost all of them indicate wildfires around city as the source of smoke. The ratio of levoglucosan (LG) to mannosan near 5 confirms the origin of smoke from coniferous forest fires around megacity. Low ratio of LG/OC near 0.8% indicates the degradation of major molecular tracer of biomass burning in urban environment. Total concentration of inorganic ions dominated by sulfates SO42- and ammonium NH4+ was found about 5 times higher during large-scale wildfires than in August 2011. Together with strong sulfate and ammonium absorbance in smoke aerosols, these observations prove the formation of secondary inorganic species associated with wildfire gaseous emissions and their transformation in aged smoke. Accumulation of carbonyl compounds during extreme smoke event in Moscow resulted from photochemical aging and secondary organic aerosol (SOA) formation in the urban atmosphere. The mixture of carbonaceous particles and dust revealed multicomponent structure of Moscow smoke aerosols, pointing the difference with non-smoke ambient aerosols. The abundance of group containing soot and tar balls approached at least a half of total aerosol concentration during extreme event, relating to elevated OC, EC and SOA. Fly ash groups contained calcium sulfates and carbonates from soil entrainment by hot air convection. Small-scale open fire experiments support the identification of specific chemical features of regional biomass burning and demonstrate the strong impact of large-scale wildfires on aerosol chemistry and air quality in highly polluted megacity. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81184
Appears in Collections: 气候变化事实与影响
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作者单位: Scobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russian Federation; Institute of Chemical Technologies and Analytics, Vienna University of Technology, Vienna, Austria; Oboukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Moscow, Russian Federation
Recommended Citation:
Popovicheva O,, Kistler M,, Kireeva E,et al. Physicochemical characterization of smoke aerosol during large-scale wildfires: Extreme event of August 2010 in Moscow[J]. Atmospheric Environment,2014-01-01,96