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| Titel |
The H2O-O2 water vapour complex in the Earth's atmosphere |
| VerfasserIn |
Y. Kasai, E. Dupuy, R. Saito, K. Hashimoto, A. Sabu, S. Kondo, Y. Sumiyoshi, Y. Endo |
| 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. 16 ; Nr. 11, no. 16 (2011-08-23), S.8607-8612 |
| Datensatznummer |
250010024
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| Publikation (Nr.) |
 copernicus.org/acp-11-8607-2011.pdf |
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| Zusammenfassung |
| Until recently, abundance estimates for bound molecular complexes have been
affected by uncertainties of a factor 10–100. This is due to the difficulty
of accurately obtaining the equilibrium constant, either from laboratory
experiments or by statistical thermodynamic calculations. In this paper, we
firstly present laboratory experiments that we performed in order to
determine the molecular structure of H2O-O2. We also derive
global abundance estimates for H2O-O2 in the Earth's
atmosphere. The equilibrium constant Kp evaluated using the
"anharmonic oscillator approach" (AHOA) (Sabu et al., 2005) was employed: the
AHOA explains well the structure of the complex obtained by the present
experiment. The Kp calculated by this method shows a realistic
temperature dependence. We used this Kp to derive global abundance
estimates for H2O-O2 in the Earth's atmosphere. The
distribution of H2-O2 follows that of water vapour in the
troposphere and seems inversely proportional to temperature in the lower
stratosphere. Preliminary estimates at the surface show amount of
H2O-O2 is comparable to CO or N2O, ranking
water vapour complexes among the ten most abundant species in the boundary
layer. |
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