The prime killer of the ring current at storm maximum

Details The prime killer of the ring current at storm maximum The prime killer of the ring current at storm maximum

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm51c..08d&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM51C-08

Physics

2736 Magnetosphere/Ionosphere Interactions, 2740 Magnetospheric Configuration And Dynamics, 2760 Plasma Convection, 2778 Ring Current, 2788 Storms And Substorms

Scientific paper

Charge-exchange decay of the ring current is among the rather successful paradigms in space storm physics. It is generally accepted that charge exchange is the major loss process of the storm-time ring current. Moreover, charge exchange has been considered as the driving mechanism of the two-stage recovery - a particular feature of intense storms reported by S.-I. Akasofu as early as 1963. However, recent observations and modeling studies indicate that convective drift loss through the dayside magnetopause rivals charge exchange in producing the two-stage ring current decay. A comparative study of two intense space storms in June 1991 and September 1998 partly confirmed this scenario, introducing however a solar cycle dependence through the abundance of O+ ions in the inner magnetosphere. We present and discuss these results.

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