Critical Test Of The Directly Driven Current System Concept

Details Critical Test Of The Directly Driven Current System Concept Critical Test Of The Directly Driven Current System Concept

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm41b1729g&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM41B-1729

Physics

[2409] Ionosphere / Current Systems, [2704] Magnetospheric Physics / Auroral Phenomena, [2790] Magnetospheric Physics / Substorms

Scientific paper

We present results from a study of the response of the magnetosphere-ionosphere system to southward turnings of the Interplanetary Magnetic Field. This is the period during which the M-I system is preconditioned for a subsequent substorm expansion phase onset. The loading process is manifested in the ionospheric current system and we show extensive observations challenging the “standard DP1-DP2 model”. We find significant differences in the response of the auroral electrojet system in the dark ionosphere vs. the sunlit ionosphere. This indicates a discontinuity located near or at the terminator.

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