Energetic Coupling of the Solar Wind-Magnetosphere-Ionosphere System During High-Speed Streams (Invited)

Details Energetic Coupling of the Solar Wind-Magnetosphere-Ionosphere System During High-Speed Streams (Invited) Energetic Coupling of the Solar Wind-Magnetosphere-Ionosphere System During High-Speed Streams (Invited)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm24a..02l&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM24A-02

Physics

[2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions, [2740] Magnetospheric Physics / Magnetospheric Configuration And Dynamics, [2784] Magnetospheric Physics / Solar Wind/Magnetosphere Interactions, [2788] Magnetospheric Physics / Magnetic Storms And Substorms

Scientific paper

Coronal mass ejections (CMEs) and high-speed streams (HSSs) are the two most common causes of geomagnetic storms in the Earth's inner magnetosphere. Although geomagnetic storms associated with HSSs are generally much weaker in intensity compared to those associated with CMEs, they have a longer duration and are often recurrent with a period of solar rotation. There is ample observational evidence showing the effects of HSSs on thermospheric density and composition. However, it is yet to be understood how exactly energies are being transferred from the solar wind and dissipated into the magnetosphere and ionosphere during HSS events. This paper addresses the global energy dissipation in the magnetosphere and ionosphere during HSSs in terms of Joule heating and energetic particle precipitation. The energy coupling efficiency between the solar wind and magnetosphere/ionosphere will be examined, and it will be compared to that during CME-driven events to shed new lights on the coupling processes between the solar wind and magnetosphere-ionosphere under the different solar conditions.

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