Total ozone response to major geomagnetic storms and changes in meteorological situations |
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Authors: | Pavel Mlch Jan La?tovi?ka |
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Institution: | (1) Institute of Atmospheric Physics, Acad. Sci. Czech Republic, Prague |
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Abstract: | Summary The total ozone response to strong major geomagnetic storms (Ap≥60) in winter along the 50° N latitudinal circle is studied. The results add to the recent results of Laštovička et al. (1992)
obtained for European middle latitudes (∼50°N) and to the results of Mlch (1994). A significant response of total ozone is
only observed in winter under high solar activity/E-phase of QBO conditions (E-max) and seems to be caused by geomagnetic
storm-induced changes of atmospheric dynamics. There are two sectors along latitude 50°N, which are sensitive to forcing by
geomagnetic storms both in total ozone and the troposphere — north-eastern Atlantic-European and eastern Siberia-Aleutian
sectors. The total ozone response under E-max conditions manifests itself mainly as a large decrease in the longitudinal variation
of ozone after the storm, which means an increase of ozone in Europe. The observed effects in total ozone consist in redistribution,
not production or loss of ozone. |
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Keywords: | middle atmosphere total ozone solar-terrestrial disturbances atmospheric dynamics |
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