气候变化领域集成服务门户(CCPortal): Biomass-burning-derived particles from a wide variety of fuels

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DOI	10.5194/acp-20-1531-2020
	Biomass-burning-derived particles from a wide variety of fuels - Part 1: Properties of primary particles
	McClure C.D.; Lim C.Y.; Hagan D.H.; Kroll J.H.; Cappa C.D.
发表日期	2020
ISSN	16807316
起始页码	1531
结束页码	1547
卷号	20 期号:3
英文摘要	Relationships between various optical, physical, and chemical properties of biomass-combustion-derived particles are characterized for particles produced in the laboratory from a wide range of fuels and burn conditions. The modified combustion efficiency (MCE), commonly used to parameterize biomass particle emissions and properties, is shown to generally have weak predictive capabilities, especially for more efficient combustion conditions. There is, however, a strong relationship between many intensive optical properties (e.g., single-scatter albedo, Ångström absorption exponent, mass absorption efficiency) and the organic aerosol-to-black carbon ([OA]/[BC]) mass ratio over a wider range than previously considered (0.3 to 105). The properties of brown carbon (BrC, i.e., light-absorbing organic carbon) also vary with [OA]/[BC]. Coating-induced enhancements (i.e., effects) contribute only a minor amount to BC absorption for all of the burns despite some burns producing particles having large ensemble-average coating-to-core mass ratios. The BC-OA mixing state varies strongly with [OA]/[BC]; the fraction of OA that is internally mixed with BC decreases with [OA]/[BC] while the relative amount of OA coated on BC increases. In contrast, there is little relationship between many OA bulk chemical properties and [OA]/[BC], with the O:C and H:C atomic ratios and the relative abundance of a key marker ion (m/z=60 linked to levoglucosan) all showing no dependence on [OA]/[BC]. In contrast, both the organic nitrate fraction of OA and the OA volatility do depend on the [OA]/[BC]. Neither the total particle nor BC-specific size distributions exhibit any clear dependence on the burn conditions or [OA]/[BC], although there is perhaps a dependence on fuel type. Overall, our results expand on existing knowledge to contribute new understanding of the properties of particles emitted from biomass combustion. © 2020 Copernicus GmbH. All rights reserved.
关键词	aerosol atmospheric chemistry biomass burning black carbon combustion concentration (composition)fuel particulate matter
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132250
推荐引用方式 GB/T 7714	McClure C.D.,Lim C.Y.,Hagan D.H.,et al. Biomass-burning-derived particles from a wide variety of fuels - Part 1: Properties of primary particles[J]. Atmospheric Chemistry and Physics,2020,20(3).
APA	McClure C.D.,Lim C.Y.,Hagan D.H.,Kroll J.H.,&Cappa C.D..(2020).Biomass-burning-derived particles from a wide variety of fuels - Part 1: Properties of primary particles.,20(3).
MLA	McClure C.D.,et al."Biomass-burning-derived particles from a wide variety of fuels - Part 1: Properties of primary particles".20.3(2020).