DOI: 10.1002/grl.50203
论文题名: Secondary organic aerosol formation from semi- and intermediate-volatility organic compounds and glyoxal: Relevance of O/C as a tracer for aqueous multiphase chemistry
作者: Waxman E.M. ; Dzepina K. ; Ervens B. ; Lee-Taylor J. ; Aumont B. ; Jimenez J.L. ; Madronich S. ; Volkamer R.
刊名: Geophysical Research Letters
ISSN: 0094-9279
EISSN: 1944-9010
出版年: 2013
卷: 40, 期: 5 起始页码: 978
结束页码: 982
语种: 英语
英文关键词: Aqueous-phase processing
; Glyoxal
; O/C ratio
; Organic aerosol
; S/IVOC
; Secondary Organic Aerosol
Scopus关键词: Aqueous-phase processing
; Glyoxal
; Organic aerosol
; S/IVOC
; Secondary organic aerosols
; Aerosols
; Uncertainty analysis
; Organic compounds
; aerosol
; aqueous solution
; empirical analysis
; estimation method
; field method
; oxidation
; parameterization
; timescale
; uncertainty analysis
; volatile organic compound
; Federal District [Mexico]
; Mexico [North America]
; Mexico City
英文摘要: The role of aqueous multiphase chemistry in the formation of secondary organic aerosol (SOA) remains difficult to quantify. We investigate it here by testing the rapid formation of moderate oxygen-to-carbon (O/C) SOA during a case study in Mexico City. A novel laboratory-based glyoxal-SOA mechanism is applied to the field data, and explains why less gas-phase glyoxal mass is observed than predicted. Furthermore, we compare an explicit gas-phase chemical mechanism for SOA formation from semi- and intermediate-volatility organic compounds (S/IVOCs) with empirical parameterizations of S/IVOC aging. The mechanism representing our current understanding of chemical kinetics of S/IVOC oxidation combined with traditional SOA sources and mixing of background SOA underestimates the observed O/C by a factor of two at noon. Inclusion of glyoxal-SOA with O/C of 1.5 brings O/C predictions within measurement uncertainty, suggesting that field observations can be reconciled on reasonable time scales using laboratory-based empirical relationships for aqueous chemistry. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876810401&doi=10.1002%2fgrl.50203&partnerID=40&md5=6954dffe1f95da5889de72b8f37385a1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6543
Appears in Collections: 气候减缓与适应
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作者单位: Department of Chemistry and Biochemistry, University of Colorado Boulder, 215 UCB, Boulder, CO 80309, United States
Recommended Citation:
Waxman E.M.,Dzepina K.,Ervens B.,et al. Secondary organic aerosol formation from semi- and intermediate-volatility organic compounds and glyoxal: Relevance of O/C as a tracer for aqueous multiphase chemistry[J]. Geophysical Research Letters,2013-01-01,40(5).