| Autor: |
O'Brien, RE, Neu, A, Epstein, SA, MacMillan, AC, Wang, B, Kelly, ST, Nizkorodov, SA, Laskin, A, Moffet, RC, Gilles, MK |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Zdroj: |
O'Brien, RE; Neu, A; Epstein, SA; MacMillan, AC; Wang, B; Kelly, ST; et al.(2014). Physical properties of ambient and laboratorygenerated secondary organic aerosol. Geophysical Research Letters, 41(12), 4347-4353. doi: 10.1002/2014GL060219. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/74r4p63v |
| DOI: |
10.1002/2014GL060219. |
| Popis: |
© 2014. American Geophysical Union. All Rights Reserved. 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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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