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| Titel |
A two-dimensional volatility basis set: 1. organic-aerosol mixing thermodynamics |
| VerfasserIn |
N. M. Donahue, S. A. Epstein, S. N. Pandis, A. L. Robinson |
| 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 ; 11, no. 7 ; Nr. 11, no. 7 (2011-04-07), S.3303-3318 |
| Datensatznummer |
250009594
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| Publikation (Nr.) |
 copernicus.org/acp-11-3303-2011.pdf |
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| Zusammenfassung |
| We develop the thermodynamic underpinnings of a two-dimensional volatility
basis set (2D-VBS) employing saturation mass concentration (Co) and the
oxygen content (O:C) to describe volatility, mixing thermodynamics, and
chemical evolution of organic aerosol. The work addresses a simple question:
"Can we reasonably constrain organic-aerosol composition in the atmosphere
based on only two measurable organic properties, volatility and the extent of
oxygenation?" This is an extension of our earlier one-dimensional approach
employing volatility only (C* = γ Co, where γ is an
activity coefficient). Using available constraints on bulk organic-aerosol
composition, we argue that one can reasonably predict the composition of
organics (carbon, oxygen and hydrogen numbers) given a location in the Co
– O:C space. Further, we argue that we can constrain the activity
coefficients at various locations in this space based on the O:C of the
organic aerosol. |
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