Application of a Simple 1-D Propagating Barrier Model to the Onset of Cosmic Ray Modulation in Solar Cycles 20-23

Details Application of a Simple 1-D Propagating Barrier Model to the Onset of Cosmic Ray Modulation in Solar Cycles 20-23 Application of a Simple 1-D Propagating Barrier Model to the Onset of Cosmic Ray Modulation in Solar Cycles 20-23

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....9.3710r&link_type=abstract

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

Physics

2

Scientific paper

The relationship between the evolution of the solar magnetic field and cosmic ray modulations at 1 AU on time-scales of ˜1 year is investigated using a simple model in which changes in the solar magnetic field propagate from the Sun and cause a change in the radial diffusion coefficient which is assumed to scale as some power of the IMF magnitude. The recovery in the cosmic ray density is modeled by a recovery time which physically is related to particle entry into the depleted regions of the heliosphere by drift and perpendicular diffusion. The model incorporates the observed variations of various solar and interplanetary parameters.

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