Physics
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jatp...52.1185f&link_type=abstract
(A91-27441 10-46) Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 52, Dec. 1990, p. 1185-1191.
Physics
10
Magnetic Field Configurations, Magnetic Storms, Magnetohydrodynamic Waves, Magnetospheric Ion Density, Ring Currents, Charge Exchange, Earth Surface, Interplanetary Medium, Ion Temperature
Scientific paper
This review examines models existing in the literature which describe the magnetic field produced by the ring current (DR) at the earth's surface based on the energy balance equation. The parameters of this equation, the injection function F and decay parameter tau are considered to depend on parameters of the interplanetary medium and the DR intensity. The existing models are shown to be able to describe the DR variations with sufficient accuracy (rms deviation between the experimental and modeled values of DR for 170 magnetic storms is 5-15 nT, and the correlation coefficient between the two is 0.85-1. The models describe that part of the geomagnetic field variation at low latitudes during a magnetic storm that is controlled by the geoeffective characteristics of the interplanetary medium and which thus responds immediately to its variations (the driven part).
Fel'Dshtein Ia. I.
Grafe A.
Pisarskii Iu. V.
Prigansova A.
Sumaruk P. V.
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