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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 17, issue 7
Ann. Geophys., 17, 933–940, 1999
https://doi.org/10.1007/s00585-999-0933-4
© European Geosciences Union 1999
Ann. Geophys., 17, 933–940, 1999
https://doi.org/10.1007/s00585-999-0933-4
© European Geosciences Union 1999

  31 Jul 1999

31 Jul 1999

Very low zonally asymmetric ozone values in March 1997 above the North Atlantic-European region, induced by dynamic processes

G. Entzian and D. Peters G. Entzian and D. Peters
  • Institut für Atmosphärenphysik an der Universität Rostock, D-18225 Kühlungsborn, Mecklenburg-Vorpommern, Germany
  • E-mail: peters@iap-kborn.de

Abstract. The total ozone distribution in March 1997 showed very low values in the North Atlantic-European region, even lower than in the years before. A spatial pattern correlation between the zonally asymmetric part of total ozone and that of the 300 hPa surface geopotential of the Northern Hemisphere was applied to examine the spatial structure of the low ozone values and its dynamic dependence. A trend analysis in the North Atlantic-European region was carried out to determine to what extent the low March 1997 ozone values are related to the decadal change of meteorological parameters in the lower stratosphere, observed since the 1980s, in comparison to the interannual variability. The conclusion is that the very low ozone values above the North Atlantic-European region in March 1997 were mainly induced by dynamic processes, namely their decadal change as well as their interannual variability.

Key words. Meteorology and atmospheric dynamics (climatology; middle atmosphere dynamics)

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