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| Titel |
A new modeling tool for the diffusion of gases in ice or amorphous binary mixture in the polar stratosphere and the upper troposphere |
| VerfasserIn |
C. A. Varotsos, R. Zellner |
| 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 ; 10, no. 6 ; Nr. 10, no. 6 (2010-03-31), S.3099-3105 |
| Datensatznummer |
250008275
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| Publikation (Nr.) |
 copernicus.org/acp-10-3099-2010.pdf |
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| Zusammenfassung |
| To elaborate stratospheric ozone depletion processes, measurements of
diffusion coefficients of selected gas phase molecules (i.e. HCl,
CH3OH, HCOOH and CH3COOH; Katsambas et al., 1997; Kondratyev and Varotsos,
1996; Varotsos et al., 1994, 1995) in ice in the temperature range
170–195 K have been analyzed with respect to the mechanisms and rates of
diffusion. It is argued that the diffusion in ice of these compounds is
governed by a vacancy – mediated mechanism, i.e. H2O vacancies are
required to diffuse to lattice sites adjacent to these compounds prior to
the diffusion of the corresponding molecule into the vacancy sites. In
addition, we show that the diffusion coefficients of these compounds exhibit
a specific interconnection, i.e. a linear relationship holds between the
logarithm of the pre-exponential factor, Do, and the activation energy
E. The physical meaning of this interconnection is discussed. |
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