New interpretation of magnetospheric energy circulation

Details New interpretation of magnetospheric energy circulation New interpretation of magnetospheric energy circulation

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3307101p&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 7, CiteID L07101

Physics

7

Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Magnetic Storms And Substorms (7954), Magnetospheric Physics: Numerical Modeling, Magnetospheric Physics: Magnetosphere/Ionosphere Interactions (2431)

Scientific paper

New results from the global MHD simulation GUMICS-4 show that the energy transfer rate from the solar wind into the magnetosphere is a function of also the past values of the IMF. Furthermore, comparison of the energy input rate with the conversion and dissipation rates in the magnetosphere and ionosphere shows that the energy entering the magnetosphere is processed by the system without delay. This and earlier observations lead us to suggest that the role of energy input during the substorm growth phase is to facilitate the configuration change rather than to store energy for later dissipation. While the change of magnetotail stability requires configuration change, the substorm energetics after the onset is quite directly driven by the solar wind energy input.

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