Articles | Volume 13
Adv. Geosci., 13, 31–35, 2007
https://doi.org/10.5194/adgeo-13-31-2007
Adv. Geosci., 13, 31–35, 2007
https://doi.org/10.5194/adgeo-13-31-2007

  13 Aug 2007

13 Aug 2007

Regional cosmic ray induced ionization and geomagnetic field changes

G. A. Kovaltsov1 and I. G. Usoskin2 G. A. Kovaltsov and I. G. Usoskin
  • 1Ioffe Physical-Technical Institute, St. Petersburg, Russia
  • 2Sodankylä Geophysical Observatory (Oulu Unit), University of Oulu, Finland

Abstract. Cosmic ray induced ionization (CRII) is an important factor of outer space influences on atmospheric properties. Variations of CRII are caused by two different processes – solar activity variations, which modulate the cosmic ray flux in interplanetary space, and changes of the geomagnetic field, which affects the cosmic ray access to Earth. Migration of the geomagnetic dipole axis may greatly alter CRII in some regions on a time scale of centuries and longer. Here we present a study of CRII regional effects of the geomagnetic field changes during the last millennium for two regions: Europe and the Far East. We show that regional effects of the migration of the geomagnetic dipole axis may overcome global changes due to solar activity variations.