Quasi-static magnetospheric MHD processes and the 'ground state' of the magnetosphere

Details Quasi-static magnetospheric MHD processes and the 'ground state' of the magnetosphere Quasi-static magnetospheric MHD processes and the 'ground state' of the magnetosphere

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988rvgeo..26..823v&link_type=abstract

Reviews of Geophysics (ISSN 8755-1209), vol. 26, Nov. 1988, p. 823-843.

Physics

Geophysics

22

Earth Magnetosphere, Geomagnetism, Space Plasmas, Convection, Geomagnetic Tail, Magnetic Disturbances, Magnetic Field Configurations

Scientific paper

The possible existence of a theoretically well-defined ground state of the earth's magnetosphere is discussed in the context of magnetic equilibrium and convection theories. The quasi-static MHD theory is reviewed and a two-dimensional model is used to show that the convecting magnetosphere can reach a steady state. It is suggested that, under the influence of convection, magnetic substorms occur periodically in the magnetosphere and are an integral part of the entire convection cycle. The concept of the ground state of the magnetosphere is examined. The term 'average magnetosphere', is proposed for defining a baseline configuration that corresponds to average solar wind conditions.

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