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| Titel |
Theoretical validation of ground-based microwave ozone observations |
| VerfasserIn |
P. Ricaud, G. Brasseur, J. Brillet, J. Noë, J.-P. Parisot, M. Pirre |
| 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 ; 12, no. 7 ; Nr. 12, no. 7, S.664-673 |
| Datensatznummer |
250010976
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| Publikation (Nr.) |
 copernicus.org/angeo-12-664-1994.pdf |
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| Zusammenfassung |
| Ground-based microwave measurements of the
diurnal and seasonal variations of ozoneat 42±4.5 and 55±8 km are validated by
comparing with results from a zero-dimensional photochemical model and a
two-dimensional (2D) chemical/radiative/dynamical model, respectively. O3
diurnal amplitudes measured in Bordeaux are shown to be in agreement with theory
to within 5%. For the seasonal analysis of O3 variation, at 42±4.5
km, the 2D model underestimates the yearly averaged ozone concentration compared
with the measurements. A double maximum oscillation (~3.5%) is measured in
Bordeaux with an extended maximum in September and a maximum in February, whilst
the 2D model predicts only a single large maximum (17%) in August and a
pronounced minimum in January. Evidence suggests that dynamical transport causes
the winter O3 maximum by propagation of planetary waves, phenomena
which are not explicitly reproduced by the 2D model. At 55±8 km, the modeled
yearly averaged O3 concentration is in very good agreement with the
measured yearly average. A strong annual oscillation is both measured and
modeled with differences in the amplitude shown to be exclusively linked to
temperature fields. |
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