Critical Issues of the Near-Earth Neutral-Line Model

Details Critical Issues of the Near-Earth Neutral-Line Model Critical Issues of the Near-Earth Neutral-Line Model

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsm22a..06o&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SM22A-06

Physics

2704 Auroral Phenomena (2407), 2721 Field-Aligned Currents And Current Systems (2409), 2723 Magnetic Reconnection (7526, 7835), 2744 Magnetotail, 2790 Substorms

Scientific paper

The substorm trigger is often addressed in terms of the formation of a near-Earth neutral-line (NENL). The currently popular idea, the outside-in model, proposes that the substorm is triggered as the fast plasma flow caused by near-Earth reconnection changes the current and plasma distributions in the near-Earth magnetotail. In this presentation I shall discuss some fundamental features of the substorm onset that this model does not explain explicitly. The list of such features includes the auroral expansion, pseudobreakup, and northward turning. Critical tests of the outside-in model in terms of those features should be essential for advancing our understanding of the substorm trigger mechanism.

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