A synthesis of magnetospheric substorm models

Details A synthesis of magnetospheric substorm models A synthesis of magnetospheric substorm models

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.1849l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Feb. 1, 1991, p. 1849-1856.

Mathematics

Logic

219

Dynamic Models, Earth Magnetosphere, Magnetic Field Reconnection, Magnetic Storms, Polar Substorms, Magnetic Field Configurations, Magnetohydrodynamic Waves, Plasma Heating, Wave Propagation

Scientific paper

Three decades of research in magnetospheric substorms has not led to a general consensus view of the substorm process. Several substorm models, mostly phenomenological, are presently under consideration. These competing models, each being justifiable on the basis of certain features of a substorm, have major differences as well as similarities among them. A synthesis substorm model is desirable, as first suggested by Siscoe (1986). This paper constructs a coherent description of substorm development by extracting some important components from these existing models. The scenario of the synthesis model includes the ionospheric influence on substorm expansion onset, current disruptions leading to convection surges and tailward propagating rarefaction waves, wave-induced precipitation, local time expansion of the disturbance region via velocity-shear-related instabilities, plasma sheet heating by resonant absorption of hydromagnetic waves, and the formation of magnetic reconnection domains. This synthesis represents one possible way to integrate the different existing models coherently.

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