[Cosmic rays as the main factor affecting solar variability on climatic and atmospheric parameters].

Analysis of experimental data demonstrates that cosmic ray enhancement stimulates an increase of atmospheric aerosols and cloudiness. The study of solar proton events (SPE) has shown that during SPE one can observe increase in aerosol density by 1.2-1.

[Heliomagnetic activity and level of extreme situations at the Polar cap].

It was found that the frequency of extreme situations (traumas, deaths, sudden diseases) in miners working in Spitsbergen mines (74 degree N) correlates well with heliogeomagnetic activity (local magnetic disturbances, solar proton flashes). It was shown that in winter, both an enhanced and an extremely low level of magnetic activity can affect the occurrence of extreme situations. The results obtained can be used for predicting and reducing the frequency of extreme events in the zone of the polar cap during geomagnetic disturbances.