| DOI: | 10.2172/1248934
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| 报告号: | DOE/SC-ARM--16-017
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| 报告题名: | Characterization of Black Carbon Mixing State Field Campaign Report |
| 作者: | Sedlacek, A.; Davidovits, P.; Lewis, E. R.; Onasch, T. B.
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| 出版年: | 2016
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| 发表日期: | 2016-04-01
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| 总页数: | 20
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| 国家: | 美国
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| 语种: | 英语
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| 中文主题词: | 碳
; 散射
; 冷凝
; 生物量
; 生物质燃烧
; 凝结
|
| 主题词: | CARBON
; SCATTERING
; CONDENSATION
; BIOMASS
; BIOMASS BURNING
|
| 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) |
| URL: | http://www.osti.gov/scitech/servlets/purl/1248934
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/42169
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1248934.pdf（1722KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Sedlacek, A.,Davidovits, P.,Lewis, E. R.,et al. Characterization of Black Carbon Mixing State Field Campaign Report. 2016-01-01.
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