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National Repository of Grey Literature 5 records found  Search took 0.00 seconds. 
Effects of solar and geomagnetic activity on the occurrence of synoptic situations in Europe
Huth, Radan ; Kyselý, Jan ; Bochníček, Josef ; Hejda, Pavel
Winter months are divided into three classes according to the mean monthly solar F10.7 flux. Within each class, frequencies of occurrence of groups of Hess-Brezowsky synoptic types are calculated.
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Comparison of solar and geomagnetic effects on the atmospheric circulation variability modes
 Huth, Radan ; Pokorná, Lucie ; Bochníček, Josef ; Hejda, Pavel
The shapes, spatial extent, and intensity of modes of low-frequency variability of atmospheric circulation in the Northern Hemisphere in winter are significantly affected by the phase of the 11-yr solar cycle. Here we extend the analysis to the geomagnetic activity, and compare the results with the solar activity.
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Solar/geomagnetic aktivity, temperature of the winter polar lower stratosphere, the QBO phase and the stratospheric polar vortex
 Bochníček, Josef ; Hejda, Pavel ; Huth, Radan ; Davídkovová, Hana
Labitzke (1987) has found a strong correlation between lower stratosphere temperature and solar cycle for data divided according to the QBO phase. This correlation explained why low solar activity combined with QBO-east phase or high solar activity and QBO-west phase was often followed by stratospheric warming and disturbed polar vortex. On th other hand, Arnold and Robinson (2001) have shown that high geomagnetic activity gives rise to cooling of lower stratosphere and leads to the strenghtening of polar vortex.
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The influence of the 11-year solar cycle on the Arctic Oscillation
 Huth, Radan ; Bochníček, Josef ; Hejda, Pavel
We study the influence of the solar activity on the Arctic Oscillation, in particular on its intensity and Pacific centre.
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Effect of solar activity on the modes of variability of atmospheric circulation
 Huth, Radan ; Pokorná, Lucie ; Bochníček, Josef ; Hejda, Pavel
Solar activity effect on relative intensity and the range of variability modes has been proved.
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