Characterization of Black Carbon Mixing State Field Campaign Report

doi:10.2172/1248934

GSTDTAP > 地球科学

DOI	10.2172/1248934
报告编号	DOE/SC-ARM--16-017
来源ID	OSTI ID: 1248934
	Characterization of Black Carbon Mixing State Field Campaign Report
	Sedlacek, A.; Davidovits, P.; Lewis, E. R.; Onasch, T. B.
	2016-04-01
出版年	2016
页数	20
语种	英语
国家	美国
出版者	DOE ARM Climate Research Facility, Pacific Northwest National Laboratory;Richland, Washington.
领域	地球科学
英文摘要	Interpreting the temporal relationship between the scattering and incandescence signals recorded by the Single Particle Soot Photometer (SP2), Sedlacek et al. (2012) reported that 60% of the refractory black carbon containing particles in a plume containing biomass burning tracers exhibited non-core-shell structure. Because the relationship between the rBC (refractory black carbon) incandescence and the scattering signals had not been reported in the peer-reviewed literature, and to further evaluate the initial interpretation by Sedlacek et al., a series of experiments was undertaken to investigate black carbon-containing particles of known morphology using Regal black (RB), a proxy for collapsed soot, as the light-absorbing substance to characterize this signal relationship. Particles were formed by coagulation of RB with either a solid substance (sodium chloride or ammonium sulfate) or a liquid substance (dioctyl sebacate), and by condensation with dioctyl sebacate, the latter experiment forming particles in a core-shell configuration. Each particle type experienced fragmentation (observed as negative lagtimes), and each yielded similar lagtime responses in some instances, confounding attempts to differentiate particle morphology using current SP2 lagtime analysis. SP2 operating conditions, specifically laser power and sample flow rate, which in turn affect the particle heating and dissipation rates, play an important role in the behavior of particles in the SP2, including probability of fragmentation. This behavior also depended on the morphology of the particles and on the thermochemical properties of the non-RB substance. Although these influences cannot currently be unambiguously separated, the SP2 analysis may still provide useful information on particle mixing states and black carbon particle sources. This work was communicated in a 2015 publication (Sedlacek et al. 2015)
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/7170
专题	地球科学
推荐引用方式 GB/T 7714	Sedlacek, A.,Davidovits, P.,Lewis, E. R.,et al. Characterization of Black Carbon Mixing State Field Campaign Report:DOE ARM Climate Research Facility, Pacific Northwest National Laboratory;Richland, Washington.,2016.