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Estimates of magnetic flux, and energy balance in the plasma sheet during substorm expansionThe energy and magnetic flux budgets of the magnetotail plasma sheet during substorm expansion are investigated. The possible mechanisms that change the energy content of the closed field line region which contains all the major dissipation mechanisms of relevance during substorms, are considered. The compression of the plasma sheet mechanism and the diffusion mechanism are considered and excluded. It is concluded that the magnetic reconnection mechanism can accomplish the required transport. Data-based empirical magnetic field models are used to investigate the magnetic flux transport required to account for the observed magnetic field dipolarizations in the inner magnetosphere. It is found that the magnetic flux permeating the current sheet is typically insufficient to supply the required magnetic flux. It is concluded that no major substorm-type magnetospheric reconfiguration is possible in the absence of magnetic reconnection.
Document ID
Document Type
Conference Paper
Hesse, Michael (NASA Goddard Space Flight Center Greenbelt, MD United States)
Birn, Joachim (Los Alamos National Lab. NM United States)
Pulkkinen, Tuija (Finnish Meteorological Inst. Helsinki, Finland)
Date Acquired
August 17, 2013
Publication Date
October 1, 1996
Subject Category
Distribution Limits
Work of the US Gov. Public Use Permitted.
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