Connection of the long-term modulation of cosmic rays with the parameters of the global magnetic field of the sun

The connection of long-term variations of galactic cosmic rays (CR) with the characteristics of the global solar magnetic field and with the solar wind parameters is considered. This paper continues our study of long-term CR variations, in which solar-heliospheric parameters are used for a description of the observed CR modulation in various solar cycles. A distinctive feature of this paper is that it is based on characteristics of the global solar magnetic field, determined on the solar-wind source surface. The set of such characteristics includes the tilt of the heliospheric current sheet and the mean intensity of the solar magnetic field and its polarity. Both the direct effect of the polarity of the global solar magnetic field on CR and the effect of the polarity on CR modulation, connected with the change in the tilt of the current sheet, are taken into account. For the period for which direct observations of the solar magnetic field are lacking, the characteristics of the global solar field have been reconstructed from observations of filaments in the H-alpha line. Thus it was possible to extend the time interval of the CR model simulation to as far as 1953. As a result, a semiempirical model of modulation has been constructed. This model adequately describes the behavior of CR with a rigidity of 10 GV during a long period covering three solar cycles.