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| Titel |
Model of daytime emissions of electronically-vibrationally excited products of O3 and O2 photolysis: application to ozone retrieval |
| VerfasserIn |
V. A. Yankovsky, R. O. Manuilova |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 24, no. 11 ; Nr. 24, no. 11 (2006-11-21), S.2823-2839 |
| Datensatznummer |
250015668
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| Publikation (Nr.) |
 copernicus.org/angeo-24-2823-2006.pdf |
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| Zusammenfassung |
| The traditional kinetics of electronically excited products of O3 and
O2 photolysis is supplemented with the processes of the energy transfer
between electronically-vibrationally excited levels O2(a1Δg, v)
and O2(b1Σ+g, v), excited atomic
oxygen O(1D), and the O2 molecules in the ground electronic state
O2(X3Σg−, v). In contrast to the previous models
of kinetics of O2(a1Δg) and O2 (b1Σ+g), our model takes into consideration the following basic
facts: first, photolysis of O3 and O2 and the processes of energy
exchange between the metastable products of photolysis involve generation of
oxygen molecules on highly excited vibrational levels in all considered
electronic states – b1Σ+g, a1Δg
and X3Σg−; second, the absorption of solar radiation
not only leads to populating the electronic states on vibrational levels
with vibrational quantum number v equal to 0 – O2(b1Σ+g, v=0) (at 762 nm) and O2(a1Δg, v=0)
(at 1.27 µm), but also leads to populating the excited
electronic–vibrational states O2(b1Σ+g, v=1)
and O2(b1Σ+g, v=2) (at 689 nm and 629 nm). The
proposed model allows one to calculate not only the vertical profiles of the
O2(a1Δg, v=0) and O2(b1Σg, v=0) concentrations, but also the profiles of
[O2(a1Δg, v≤5)], [O2 (b1Σ+g , v=1, 2)] and O2(X3Σg−, v=1–35). In the altitude range 60–125 km, consideration of the
electronic-vibrational kinetics significantly changes the calculated
concentrations of the metastable oxygen molecules and reduces the discrepancy
between the altitude profiles of ozone concentrations retrieved from the 762-nm and 1.27-µm emissions measured
simultaneously. |
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