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	Solar and geomagnetic activity effects on wind fields in the Northern hemisphere winter lower troposhere Bochníček, Josef ; Hejda, Pavel The magnitude and prevailing direction of winds in the lower troposphere were analysed in the Northern hemisphere in the winter periods of the years 1964, 1967-1969, 1971-2001. Composite maps of those winds showed marked differences, in particular between the maps in which both activities were simultaneously low or high. Detailed record
	Solar-geomagnetic activity and weather changes. Observation results Bochníček, Josef ; Hejda, Pavel ; Pýcha, Josef The impact of solar and geomagnetic activity on pressure and temperature changes in the winter lower troposphere was investigated. It was found that although correlations between solar and geomagnetic activity in individual winter periods are weak, the pressure and temperature changes show similar magnitudes. Detailed record
	Solar-geomagnetic activity and weather changes. The mechanisms Pýcha, Josef ; Bochníček, Josef ; Hejda, Pavel The mechanisms in the paper described were based on the ideas enabling to explain the observed associations between the short-term changes in solar/geomagnetic activity and short-term changes in the lower atmosphere pressure and temperature fields. Special attention was devoted to the role of planetary waves, electrostatic fields and various phases of the QBO. Detailed record
	Physical plausibility of "Sun-weather" research Bochníček, Josef ; Hejda, Pavel ; Pýcha, Josef The paper deals with the importance of three basic objections against the existence of causal link between the changes of atmospheric fields in the lower troposphere. Detailed record
	Main sources of solar wind high-speed streams during solar minimum Bochníček, Josef ; Hejda, Pavel Common analysis of solar wind (velocity, concentration, temperature) and solar soft X-ray images showed that during the solar minimum substantial majority of the solar wind high-speed streams found its source in the regions with attributes typical for coronal holes. Detailed record
	Association among the QBO, geomagnetic/solar activity and winter air pressure changes in the Northern Hemisphere Bochníček, Josef ; Hejda, Pavel ; Pýcha, Josef Analysis of the sea-level pressure changes in winter periods (January + February) 1952-1996 showed their close association with the QBO-phase and solar and geomagnetic activity level. The importance of individual activities for analyzed changes is evaluated and the mechanism that could explain the analyzed processes is described. Detailed record
	Deviations of temperature and pressure as well as prevailing wind directions in winter troposphere at high and low geomagnetic activity Bochníček, Josef ; Hejda, Pavel ; Pýcha, Josef ; Bucha, Václav Detailed record
	Forecasting of geomagnetic activity on the basis of YOHKOH soft X-ray images and Budkov observatory data Bochníček, Josef ; Hejda, Pavel ; Bucha, Václav Detailed record
	Winter north hemisphere and extraterrestrial effects Bochníček, Josef ; Bucha, Václav ; Hejda, Pavel ; Pýcha, Josef Detailed record
	Climate changes in relation to the geomagnetic and solar activity at different QBO phases Bochníček, Josef ; Bucha, Václav ; Hejda, Pavel ; Marvanová, Věra ; Pýcha, Josef Detailed record

See also: similar author names
2	Hejda, Petr

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