AbstractThere is a growing consensus that the eleven year-modulation of galactic cosmic rays (GCRs) resulting from solar activity is related to interplanetary propagating diffusive barriers (PDBs). The source of these PDBs is not well understood and numerical models describing GCR modulation simulate their effect by scaling the diffusion tensor to the interplanetary magnetic field strength (IMF). The implications of a century-scale change in solar wind speed and open solar flux, for numerical modelling of GCR modulation and the reconstruction of GCR variations over the last hundred years are discussed. The dominant role of the solar non-axisymmetric magnetic field in both forcing longitudinal solar wind speed fluctuations at solar maximum and in increasing the IMF is discussed in the context of a long-term rise in the open solar magnetic flux.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Centennial changes in solar activity and the response of galactic cosmic rays


    Contributors:

    Published in:

    Advances in Space Research ; 40 , 7 ; 1078-1086


    Publication date :

    2007-02-11


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Galactic cosmic rays

    Hayakawa, S. | Elsevier | 1984


    Shielding Against Galactic Cosmic Rays

    Schimmerling, W. | Online Contents | 1996



    Shielding Against Galactic Cosmic Rays

    Schimmerling, W. | Online Contents | 1995