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| Titel |
Early unusual ozone loss during the Arctic winter 2002/2003 compared to other winters |
| VerfasserIn |
F. Goutail, J.-P. Pommereau, F. Lefèvre, M. Roozendael, S. B. Andersen, B.-A. Kåstad Høiskar, V. Dorokhov, E. Kyrö, M. P. Chipperfield, W. Feng |
| 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 ; 5, no. 3 ; Nr. 5, no. 3 (2005-03-02), S.665-677 |
| Datensatznummer |
250002499
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| Publikation (Nr.) |
 copernicus.org/acp-5-665-2005.pdf |
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| Zusammenfassung |
| Ozone loss during the winter 2002/2003 has been evaluated from comparisons
between total ozone reported by the SAOZ network and simulated in passive
mode by both REPROBUS and SLIMCAT. Despite the fact that the two models have
a different approach to calculate the descent inside vortex, both
evaluations provide similar results 18±4% using REPROBUS
and 20±4% using SLIMCAT and show that the loss started
around mid-December, at least ten to twenty days earlier than during any of
the previous eleven winters, except 1993/1994. This unusual behaviour is
consistent with the low temperatures reported in the stratosphere as well to
the signature of early chlorine activation indicated by ground-based,
balloon and satellite observations.
A significant ozone loss is also simulated by the current versions of two
models, but of lesser amplitude compared to SAOZ, 13±2%
for REPROBUS and 16±2% for SLIMCAT, the underestimation
being already observed by mid-January. The early ozone depletion captured by
both model show that chemical depletion did indeed take place in December,
predominantly at the illuminated edge of the distorted vortex, but the
reason for the underestimation compared to the observations and the
differences among the models have still to be investigated. |
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