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| Titel |
Spatio-temporal variations of NOy species in the northern latitudes stratosphere measured with the balloon-borne MIPAS instrument |
| VerfasserIn |
A. Wiegele, A. Kleinert, H. Oelhaf, R. Ruhnke, G. Wetzel, F. Friedl-Vallon, A. Lengel, G. Maucher, H. Nordmeyer, H. Fischer |
| 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 ; 9, no. 4 ; Nr. 9, no. 4 (2009-02-16), S.1151-1163 |
| Datensatznummer |
250006917
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| Publikation (Nr.) |
 copernicus.org/acp-9-1151-2009.pdf |
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| Zusammenfassung |
| This paper presents the spatio-temporal distribution of NOy species
at altitudes between 14 and 31 km as measured with the MIPAS-B instrument on
the morning of 21 March 2003 in northern Scandinavia. At lower altitudes (below about 22 km), temperature variations, the distribution of ClONO2,
and the tracer N2O reveal the dynamics through the edge of the late
arctic polar vortex. At higher altitudes, continuous measurement before,
during, and after sunrise provides information about photochemistry
illustrating the evolution of the photochemically active gases NO2 and
N2O5 around sunrise. The measured temporal evolution of NO2 and
N2O5 is compared to box modelling that is run along backward
calculated trajectories. While the comparison of measured and modelled
N2O5 reveals significant differences, there is a good agreement
between the model and observations for NO2 in terms of volume mixing
ratios but the simulated decrease shortly after sunrise is underestimated
compared to the measurements. The differences are attributed to the
photolysis rates used in the box model calculations. |
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