| Abstract: | The results of measurements of charged particles in the troposphere of polar and middle latitudes obtained since 1957 are presented. While in stratosphere the fluxes of secondary cosmic rays reproduce well the variations of primary cosmic radiation, mostly the 11-year cycle associated with solar activity, in troposphere other variations are added which are presumably of atmospheric origin. In particular, increased amplitudes of variations were observed before 1973 and after 1991. In the Northern hemisphere, the variations contain the annual wave with maximum in the winter period. The wave phase corresponds to the expected temperature effect, but in the 1990s its amplitude was several times larger than expected. |
