Long-term variations of galactic cosmic rays and their relation with the solar magnetic field parameters

Details Long-term variations of galactic cosmic rays and their relation with the solar magnetic field parameters Long-term variations of galactic cosmic rays and their relation with the solar magnetic field parameters

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc...10.3911b&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

1

Scientific paper

The paper deals with the relation of long-term variations of galactic cosmic rays (CR) to the global solar magnetic field (GMF) and solar wind (SW) parameters. This study continues the series of work, where the tilt of the heliospheric current sheet (HCS) and other solarheliospheric parameters are successfully used to describe long-term variations of CR in the solar cycles. The novelty of the present work is the combined use of the source surface magnetic field characteristics, including HCS inclination, mean intensity of magnetic field and polarity of the global magnetic field. We take into account both the direct effect of polarity on CR variations and its effect on CR modulation related to the HCS tilt changes. The combined use of different solar parameters allows us to improve the model of long-term CR variations. The analysis of data for 1976-2000 has revealed a good correlation (the correlation coefficient 0.95) between the multi-parameter model and 10 GV galactic cosmic ray behavior during long period, spanning several cycles of solar activity.

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