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Ann. Geophys., 26, 1999-2004, 2008
www.ann-geophys.net/26/1999/2008/
© European Geosciences Union 2008

Solar activity affects the occurrence of synoptic types over Europe

R. Huth¹, J. Kyselý¹, J. Bochníček², and P. Hejda^2
1Institute of Atmospheric Physics, Boční II 1401, 141 31 Praha 4, Czech Republic
²Institute of Geophysics, Boční II 1401, 141 31 Praha 4, Czech Republic

Abstract. The solar effects on tropospheric circulation over Europe are investigated by counting the occurrence of Hess-Brezowsky synoptic types under various levels of solar activity. Solar minima are accompanied by a lower incidence of westerly types and a higher incidence of easterly and northerly types. The types with a northeast and northwest flow are most frequent under a moderate solar activity. There is a weak tendency towards the anticyclonic (cyclonic) types to be less (more) frequent under moderate solar activity. Our results are in accord with previous studies, indicating a strengthened zonal flow in solar maxima and changes in the modes of low-frequency circulation variability. The results point to the fact that the effects of solar activity are not linear.

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Citation: Huth, R., Kyselý, J., Bochníček, J., and Hejda, P.: Solar activity affects the occurrence of synoptic types over Europe, Ann. Geophys., 26, 1999-2004, 2008.   Bibtex   EndNote   Reference Manager