The Fields of Magnetospheric Current Systems on the Earth's Surface in an Interval of the Magnetic Storm Studied under the International Program on Solar-Terrestrial Physics

Details The Fields of Magnetospheric Current Systems on the Earth's Surface in an Interval of the Magnetic Storm Studied under the International Program on Solar-Terrestrial Physics The Fields of Magnetospheric Current Systems on the Earth's Surface in an Interval of the Magnetic Storm Studied under the International Program on Solar-Terrestrial Physics

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cosre..41..359f&link_type=abstract

Cosmic Research, v. 41, Issue 4, p. 359-370 (2003).

Physics

Scientific paper

Using the magnetic storm in January 1997 as an example, we examined the possibilities to employ the magnetospheric field T96 [1, 2] and the dynamic paraboloid model PM of the magnetosphere [3] for modeling the Dst variation. We have revealed the necessity to refine the results of normalizing the free parameters of the model T96 according to the solar wind parameters. The contributions to the Dst variation of magnetic fields of basic large-scale magnetospheric current systems (the field DCF on the magnetopause, the field DR of the ring current, and the field DT in the magnetotail) are estimated for different phases of the storm from model calculations. Possible causes of a discrepancy between the results of modeling Dst using the T96 and PM models are discussed. Special emphasis is made on the ratios of contributions into the Dst variation of the fields of the magnetotail and the ring current in the main phase of magnetic storms and on the contributions to Dst of the fields of various current systems at the recovery phase.

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