DOI: 10.1002/2014GL060582
论文题名: Multiphase OH oxidation kinetics of organic aerosol: The role of particle phase state and relative humidity
作者: Slade J.H. ; Knopf D.A.
刊名: Geophysical Research Letters
ISSN: 0094-9956
EISSN: 1944-9687
出版年: 2014
卷: 41, 期: 14 起始页码: 5297
结束页码: 5306
语种: 英语
英文关键词: amorphous
; chemical aging
; heterogeneous kinetics
; organic
Scopus关键词: Air quality
; Amorphous materials
; Climate models
; Free radicals
; Kinetics
; Aerosol particles
; Atmospheric model
; Chemical aging
; Heterogeneous kinetics
; Heterogeneous reactions
; organic
; Oxidation kinetics
; Trace gas species
; Aerosols
; accuracy assessment
; adsorption
; aerosol
; air quality
; biomass burning
; multiphase flow
; reaction kinetics
; reaction rate
; relative humidity
; viscosity
英文摘要: Organic aerosol can exhibit different phase states in response to changes in relative humidity (RH), thereby influencing heterogeneous reaction rates with trace gas species. OH radical uptake by laboratory-generated levoglucosan and methyl-nitrocatechol particles, serving as surrogates for biomass burning aerosol, is determined as a function of RH. Increasing RH lowers the viscosity of amorphous levoglucosan aerosol particles enabling enhanced OH uptake. Conversely, OH uptake by methyl-nitrocatechol aerosol particles is suppressed at higher RH as a result of competitive coadsorption of H2O that occupies reactive sites. This is shown to have substantial impacts on organic aerosol lifetimes with respect to OH oxidation. The results emphasize the importance of organic aerosol phase state to accurately describe the multiphase chemical kinetics and thus chemical aging process in atmospheric models to better represent the evolution of organic aerosol and its role in air quality and climate. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904852179&doi=10.1002%2f2014GL060582&partnerID=40&md5=d10361cec35fec1789cbd78e745e4f62
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7220
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Terrestrial and Planetary Atmospheres, School of Marine and Atmospheric Sciences, State University of New York at Stony Brook, Stony Brook, NY, United States
Recommended Citation:
Slade J.H.,Knopf D.A.. Multiphase OH oxidation kinetics of organic aerosol: The role of particle phase state and relative humidity[J]. Geophysical Research Letters,2014-01-01,41(14).