Other
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992angeo..10..683l&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 10, no. 9, p. 683-689.
Other
11
Magnetic Storms, Ozonosphere, Solar Activity Effects, Midlatitude Atmosphere, Winter
Scientific paper
We study the effects of major geomagnetic storms on the total ozone content at European Middle latitudes in winter over the period 1963-1988. Ozone mixing ratio data at 40, 10 and 5 hPa are also analyzed for several years. No effect is found in ozone mixing ratios. A statistically significant effect in total ozone is observed only under some conditions, the most favorable one being high solar activity, the E-phase of quasi-biennial oscillation (QBO). Generally, the effect in total ozone principally depends on the combination of phases of the solar cycle and the QBO. This combination realizes itself to a large extent through creating conditions for major midwinter stratospheric warmings to happen or not, but even the occurrence of major warmings seems to be an indication of a different dynamical character of the winter as a whole. There is a tendency to more positive effects under higher solar activity. On the other hand, there is an evident tendency to more negative effects in winters with major stratospheric warmings. The mechanism of the effects of major geomagnetic storms on the total ozone content remains unclear but it is very probably dynamical in nature.
Bremer Jürgen
Gil Manuel
Lastovicka Jan.
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