Global MHD Simulation of Dissipation of Energy in the Ionosphere During Magnetic Storms

Details Global MHD Simulation of Dissipation of Energy in the Ionosphere During Magnetic Storms Global MHD Simulation of Dissipation of Energy in the Ionosphere During Magnetic Storms

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm22b..05l&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SM22B-05

Physics

2784 Solar Wind/Magnetosphere Interactions, 2788 Storms And Substorms

Scientific paper

In this paper we present results from global MHD simulations of magnetic storm periods which are driven with solar wind data from magnetic cloud events. Specifically, we examine the characteristics of ionospheric joule heating and the solar wind variations that drive it. We find that during the period of strong driving, variations in the solar wind kinetic energy flux drive variations in the electrojets and the joule heating. The time delay for the entry of solar wind until it is dissipated is about 20 minutes. We also will present estimates for what fraction of the solar wind energy flux is dissipated in the ionosphere, comparing several events.

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