DOI: 10.1002/2014GL062444
论文题名: Biomass burning dominates brown carbon absorption in the rural southeastern United States
作者: Washenfelder R.A. ; Attwood A.R. ; Brock C.A. ; Guo H. ; Xu L. ; Weber R.J. ; Ng N.L. ; Allen H.M. ; Ayres B.R. ; Baumann K. ; Cohen R.C. ; Draper D.C. ; Duffey K.C. ; Edgerton E. ; Fry J.L. ; Hu W.W. ; Jimenez J.L. ; Palm B.B. ; Romer P. ; Stone E.A. ; Wooldridge P.J. ; Brown S.S.
刊名: Geophysical Research Letters
ISSN: 0094-9047
EISSN: 1944-8778
出版年: 2015
卷: 42, 期: 2 起始页码: 653
结束页码: 664
语种: 英语
英文关键词: aerosol optical properties
; atmospheric aerosol
; biomass burning
; brown carbon
; cavity-enhanced spectroscopy
; Southern Oxidant and Aerosol Study
Scopus关键词: Atmospheric aerosols
; Atmospheric composition
; Biomass
; Carbon
; Fog
; Light absorption
; Light extinction
; Optical properties
; Size distribution
; Aerosol optical property
; Biomass-burning
; Brown carbons
; Cavity enhanced spectroscopy
; Southern Oxidant and Aerosol Study
; Aerosols
; adsorption
; aerosol property
; biomass burning
; brown carbon
; carbon cycle
; concentration (composition)
; rural area
; size distribution
; wavelength
; Alabama
; United States
英文摘要: Brown carbon aerosol consists of light-absorbing organic particulate matter with wavelength-dependent absorption. Aerosol optical extinction, absorption, size distributions, and chemical composition were measured in rural Alabama during summer 2013. The field site was well located to examine sources of brown carbon aerosol, with influence by high biogenic organic aerosol concentrations, pollution from two nearby cities, and biomass burning aerosol. We report the optical closure between measured dry aerosol extinction at 365-nm and calculated extinction from composition and size distribution, showing agreement within experiment uncertainties. We find that aerosol optical extinction is dominated by scattering, with single-scattering albedo values of 0.94-±-0.02. Black carbon aerosol accounts for 91-±-9% of the total carbonaceous aerosol absorption at 365-nm, while organic aerosol accounts for 9-±-9%. The majority of brown carbon aerosol mass is associated with biomass burning, with smaller contributions from biogenically derived secondary organic aerosol. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923574796&doi=10.1002%2f2014GL062444&partnerID=40&md5=8571d0e4aabeda0f6c7c7a2ed1195489
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8663
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States
Recommended Citation:
Washenfelder R.A.,Attwood A.R.,Brock C.A.,et al. Biomass burning dominates brown carbon absorption in the rural southeastern United States[J]. Geophysical Research Letters,2015-01-01,42(2).