Inductive-dynamic coupling of the ionosphere with the thermosphere and the magnetosphere

Details Inductive-dynamic coupling of the ionosphere with the thermosphere and the magnetosphere Inductive-dynamic coupling of the ionosphere with the thermosphere and the magnetosphere

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm31a2069s&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM31A-2069

Physics

[2427] Ionosphere / Ionosphere/Atmosphere Interactions, [2431] Ionosphere / Ionosphere/Magnetosphere Interactions, [2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions, [2790] Magnetospheric Physics / Substorms

Scientific paper

Over the past decades, countless studies have been dedicated to describing the magnetosphere-ionosphere/thermosphere coupling and the influences of the magnetospheric variations on the ionosphere/thermosphere system. The models that have been used for practical purposes in global sense are with either a static ionosphere or a height-integrated ionosphere, both of which are not valid or adequate to describe the transient ionospheric processes such as substorms or auroral brightenings. A framework of theory has been proposed and is being developed to self-consistently describe an electromagnetically coupled collisional plasma-neutral system with the inductive and plasma as well as neutral dynamic effects. In this presentation, we compare the differences between this inductive-dynamic theory and the conventional magnetosphere-ionosphere/thermosphere coupling mechanisms. The inductive-dynamic theory shows that the transition for the ionosphere to respond to a magnetospheric change lasts about 20-30 min, the critical time scale for most of ionospheric dynamic processes. During the transition period, large amplitude fluctuations and enhanced heating are expected.

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