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| Titel |
Strong spectral dependence of light absorption by organic carbon particles formed by propane combustion |
| VerfasserIn |
M. Schnaiter, M. Gimmler, I. Llamas, C. Linke, C. Jäger, H. Mutschke |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 6, no. 10 ; Nr. 6, no. 10 (2006-07-18), S.2981-2990 |
| Datensatznummer |
250004010
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| Publikation (Nr.) |
 copernicus.org/acp-6-2981-2006.pdf |
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| Zusammenfassung |
| We have measured the extinction and absorption cross sections of carbon particles emitted by
a propane diffusion flame both in an aerosol chamber and on size-segregated samples
deposited on optical windows. The absorption cross section, the single scattering albedo, and the
Ångström exponent show drastic dependencies both on the C/O ratio and on the particle size.
This is interpretated as being due to the appearance of nucleation modes of smaller organic particles
at higher C/O ratios, which were detected by SMPS measurements and partially by TEM analysis.
The spectral range of the
validity of the absorption power-law (Ångström exponent) model is investigated by vacuum ultraviolet
extinction measurements. These measurements give also indications for a preferentially aromatic nature of the
OC component of the flame products. |
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