气候变化领域集成服务门户(CCPortal): Biomass-burning-derived particles from a wide variety of fuels-Part 2: Effects of photochemical aging on particle optical and chemical properties

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DOI	10.5194/acp-20-8511-2020
	Biomass-burning-derived particles from a wide variety of fuels-Part 2: Effects of photochemical aging on particle optical and chemical properties
	Cappa C.D.; Lim C.Y.; Hagan D.H.; Coggon M.; Koss A.; Sekimoto K.; De Gouw J.; Onasch T.B.; Warneke C.; Kroll J.H.
发表日期	2020
ISSN	1680-7316
起始页码	8511
结束页码	8532
卷号	20 期号:14
英文摘要	Particles in smoke emitted from biomass combustion have a large impact on global climate and urban air quality. There is limited understanding of how particle optical properties-especially the contributions of black carbon (BC) and brown carbon (BrC)-evolve with photochemical aging of smoke. We analyze the evolution of the optical properties and chemical composition of particles produced from combustion of a wide variety of biomass fuels, largely from the western United States. The smoke is photochemically aged in a reaction chamber over atmospheric-equivalent timescales ranging from 0.25 to 8 d. Various aerosol optical properties (e.g., the single-scatter albedo, the wavelength dependence of absorption, and the BC mass absorption coefficient, MACBC) evolved with photochemical aging, with the specific evolution dependent on the initial particle properties and conditions. The impact of coatings on BC absorption (the so-called lensing effect) was small, even after photochemical aging. The initial evolution of the BrC absorptivity (MACBrC) varied between individual burns but decreased consistently at longer aging times; the wavelength dependence of the BrC absorption generally increased with aging. The observed changes to BrC properties result from a combination of secondary organic aerosol (SOA) production and heterogeneous oxidation of primary and secondary OA mass, with SOA production being the major driver of the changes. The SOA properties varied with time, reflecting both formation from precursors having a range of lifetimes with respect to OH and the evolving photochemical environment within the chamber. Although the absorptivity of BrC generally decreases with aging, the dilution-corrected absorption may actually increase from the production of SOA. These experimental results provide context for the interpretation of ambient observations of the evolution of particle optical properties in biomass-combustion-derived smoke plumes. © 2020 Author(s).
语种	英语
scopus关键词	absorption coefficient; aerosol; biomass burning; black carbon; brown carbon; chemical property; combustion; optical property; photochemistry; United States
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141200
作者单位	Department of Civil and Environmental Engineering, University of California, Davis, CA 95616, United States; Atmospheric Sciences Graduate Group, University of California, Davis, CA 95616, United States; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; Noaa Earth System Research Laboratory (ESRL), Chemical Sciences Division, Boulder, CO 80305, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, United States; Department of Chemistry, University of Colorado Boulder, Boulder, CO 80302, United States; Graduate School of Nanobioscience, Yokohama City University, Yokohama, Kanagawa, 236-0027, Japan; Aerodyne Research, Billerica, MA 01821, United States; South Coast Air Quality Management District, Diamond Bar, CA 91765, United States; QuantAQ, Somerville, MA 02143, United States; Tofwerk Usa, Boulder, CO 80301, United States
推荐引用方式 GB/T 7714	Cappa C.D.,Lim C.Y.,Hagan D.H.,et al. Biomass-burning-derived particles from a wide variety of fuels-Part 2: Effects of photochemical aging on particle optical and chemical properties[J],2020,20(14).
APA	Cappa C.D..,Lim C.Y..,Hagan D.H..,Coggon M..,Koss A..,...&Kroll J.H..(2020).Biomass-burning-derived particles from a wide variety of fuels-Part 2: Effects of photochemical aging on particle optical and chemical properties.Atmospheric Chemistry and Physics,20(14).
MLA	Cappa C.D.,et al."Biomass-burning-derived particles from a wide variety of fuels-Part 2: Effects of photochemical aging on particle optical and chemical properties".Atmospheric Chemistry and Physics 20.14(2020).