DOI: 10.1016/j.atmosenv.2015.09.072
Scopus记录号: 2-s2.0-84943376647
论文题名: A method for segregating the optical absorption properties and the mass concentration of winter time urban aerosol
作者: Ajtai T ; , Utry N ; , Pintér M ; , Major B ; , Bozóki Z ; , Szabó G
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 313
结束页码: 320
语种: 英语
英文关键词: Absorption coefficient
; Aerosol Angström exponent
; Photoacoustic spectroscopy
; Size distribution
; Source apportionment
Scopus关键词: Aerosols
; Light absorption
; Optical correlation
; Optical properties
; Photoacoustic spectroscopy
; Shape memory effect
; Size distribution
; Spectrometers
; Wood
; Absorption co-efficient
; Aerosol number size distribution
; Carbonaceous particulate matter
; Number size distribution
; Optical absorption coefficients
; Optical absorption properties
; Photoacoustic absorption
; Source apportionment
; Electromagnetic wave absorption
; carbon
; fossil fuel
; absorption
; aerosol
; biomass burning
; concentration (composition)
; optical depth
; particle size
; pollutant source
; size distribution
; spectrometer
; traffic emission
; urban area
; winter
; absorption
; aerosol
; Article
; burn
; exhaust gas
; heating
; mass
; particulate matter
; photoacoustic spectroscopy
; priority journal
; traffic
; winter
; wood
; Aerosols
; Concentration
; Light Absorption
; Optical Properties
; Particulate Emissions
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: A novel in-situ, real time method for the determination of inherent absorption properties of light absorbing carbonaceous particulate matter and its possible application for source apportionment are introduced here. The method is deduced from a two-week campaign under wintry urban conditions during which strong correlation was found between aerosol number size distribution and wavelength dependent optical absorption coefficient (AOC(λ)), measured by a Single Mobility Particle Sizer (SMPS) and a multi-wavelength photoacoustic absorption spectrometer, respectively, while wood burning and traffic (i.e. fossil fuel burning) activity were identified to be the dominant sources of carbonaceous particulate. Indeed, during the whole campaign, regardless of the actual emission strength of the aerosol sources, the measured number size distributions were always dominated by two unimodal modes with Count Mean Diameter (CMD) of 20 and 100 nm, which could be correlated to traffic and wood burning activities, respectively. AAEff, AAEwb (i.e. the Aerosol Angström Exponent of traffic and wood burning aerosol, respectively), σff(266 nm), σff(1064 nm), σwb(266 nm) and σff(1064 nm) (i.e. the segregated mass specific optical absorption coefficients at two of the measurement wavelengths) were found to be 1.17 ± 0.18, 2.6 ± 0.14, 7.3 ± 0.3 m2g-1, 1.7 ± 0.1 m2g-1 3.4 ± 0.3 m2g-1 and 0.31 ± 0.08 m2g-1, respectively. Furthermore the introduced methodology can also disentangle and quantify the temporal variation of both the segregated optical absorptions and the segregated mass concentrations of traffic and wood burning aerosol. Accordingly, the contribution of wood burning to optical absorption of PM was found to be negligible at 1064 nm but increased gradually towards the shorter wavelengths and became commensurable with the optical absorption of traffic at 266 nm during the whole measurement period. Furthermore, the contribution of wood burning mass to CM (mass of carbonaceous particulate matter) was dominant regardless of the strength of the emission activity of traffic and wood burning during the whole measurement period. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81351
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Hungarian Academy of Sciences Univ. of Szeged (MTA-SZTE), Research Group on Photoacoustic Spectroscopy, Dóm tér 9, Szeged, Hungary; Department of Optics and Quantum Electronics, University of Szeged, Hungary, Hungarian Academy of Sciences Univ. of Szeged (MTA-SZTE), Dóm tér 9, Szeged, Hungary
Recommended Citation:
Ajtai T,, Utry N,, Pintér M,et al. A method for segregating the optical absorption properties and the mass concentration of winter time urban aerosol[J]. Atmospheric Environment,2015-01-01,122