| DOI: | 10.1002/2014GL060219
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| 论文题名: | Physical properties of ambient and laboratorygenerated secondary organic aerosol |
| 作者: | O'Brien R.E.; Neu A.; Epstein S.A.; MacMillan A.C.; Wang B.; Kelly S.T.; Nizkorodov S.A.; Laskin A.; Moffet R.C.; Gilles M.K.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10542
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| EISSN: | 1944-10273
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| 出版年: | 2014
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| 卷: | 41, 期:12 | | 起始页码: | 4347
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| 结束页码: | 4353
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| 语种: | 英语
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| Scopus关键词: | Secondary organic aerosols
; absorbance
; aerosol composition
; ambient air
; laboratory method
; organic matter
; particle size
; surface tension
; viscosity
; X-ray spectroscopy
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| 英文摘要: | The size and thickness of organic aerosol particles collected by impaction in five field campaigns were compared to those of laboratory-generated secondary organic aerosols (SOA). Scanning transmission X-ray microscopy was used to measure the total carbon absorbance (TCA) by individual particles as a function of their projection areas on the substrate. Particles with higher viscosity/surface tension can be identified by a steeper slope on a plot of TCA versus size because they flatten less upon impaction. The slopes of the ambient data are statistically similar indicating a small range of average viscosities/surface tensions across five field campaigns. Steeper slopes were observed for the plots corresponding to ambient particles, while smaller slopes were indicative of the laboratory-generated SOA. This comparison indicates that ambient organic particles have higher viscosities/surface tensions than those typically generated in laboratory SOA studies. © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902302085&doi=10.1002%2f2014GL060219&partnerID=40&md5=c7931774657d09633a764d75bd0f433d
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7806
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
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| Recommended Citation: | |
O'Brien R.E.,Neu A.,Epstein S.A.,et al. Physical properties of ambient and laboratorygenerated secondary organic aerosol[J]. Geophysical Research Letters,2014-01-01,41(12).
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