气候变化领域集成服务门户(CCPortal): Secondary organic aerosol formation from the laboratory oxidation of biomass burning emissions

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DOI	10.5194/acp-19-12797-2019
	Secondary organic aerosol formation from the laboratory oxidation of biomass burning emissions
	Lim C.Y.; Hagan D.H.; Coggon M.M.; Koss A.R.; Sekimoto K.; De Gouw J.; Warneke C.; Cappa C.D.; Kroll J.H.
发表日期	2019
ISSN	16807316
起始页码	12797
结束页码	12809
卷号	19 期号:19
英文摘要	Biomass burning is an important source of aerosol and trace gases to the atmosphere, but how these emissions change chemically during their lifetimes is not fully understood. As part of the Fire Influence on Regional and Global Environments Experiment (FIREX 2016), we investigated the effect of photochemical aging on biomass burning organic aerosol (BBOA) with a focus on fuels from the western United States. Emissions were sampled into a small (150 L) environmental chamber and photochemically aged via the addition of ozone and irradiation by 254 nm light. While some fraction of species undergoes photolysis, the vast majority of aging occurs via reaction with OH radicals, with total OH exposures corresponding to the equivalent of up to 10 d of atmospheric oxidation. For all fuels burned, large and rapid changes are seen in the ensemble chemical composition of BBOA, as measured by an aerosol mass spectrometer (AMS). Secondary organic aerosol (SOA) formation is seen for all aging experiments and continues to grow with increasing OH exposure, but the magnitude of the SOA formation is highly variable between experiments. This variability can be explained well by a combination of differences in OH exposure and the total concentration of non-methane organic gases (NMOGs) in the chamber before oxidation, as measured by PTR-ToF-MS (r2 values from 0.64 to 0.83). From this relationship, we calculate the fraction of carbon from biomass burning NMOGs that is converted to SOA as a function of equivalent atmospheric aging time, with carbon yields ranging from 24±4% after 6 h to 56±9% after 4 d. © Author(s) 2019.
语种	英语
scopus关键词	biomass burning; chemical composition; concentration (composition); emission; irradiation; oxidation; ozone; photochemistry; photolysis; 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/144094
作者单位	Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, CO, United States; Department of Chemistry, University of Colorado, Boulder, CO, United States; Graduate School of Nanobioscience, Yokohama City University, Yokohama, Japan; Department of Civil and Environmental Engineering, University of California, Davis, CA, United States; Department of Chemistry, University of Toronto, Toronto, ON, Canada; TOFWERK USA, Boulder, CO, United States
推荐引用方式 GB/T 7714	Lim C.Y.,Hagan D.H.,Coggon M.M.,et al. Secondary organic aerosol formation from the laboratory oxidation of biomass burning emissions[J],2019,19(19).
APA	Lim C.Y..,Hagan D.H..,Coggon M.M..,Koss A.R..,Sekimoto K..,...&Kroll J.H..(2019).Secondary organic aerosol formation from the laboratory oxidation of biomass burning emissions.Atmospheric Chemistry and Physics,19(19).
MLA	Lim C.Y.,et al."Secondary organic aerosol formation from the laboratory oxidation of biomass burning emissions".Atmospheric Chemistry and Physics 19.19(2019).