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Animation illustrating Formation of the Plasmapause by the mechanism of Interchange and its deformation using a time dependent magnetospheric electric field model
Lemaire (1984) Belgian Institute for Space Aeronomy, Brussels
Centre for Space Radiations, Université cath. Louvain, LLN


This movie is a digitalized version of a VHS video produced in 1983, at the Belgian Institute for Space Aeronomy (BISA), Brussels. It illustrates the formation of the Plasmapause by the mechanism of the interchange motion which is driven convectively unstable in the night side local time sector due to enhanced magnetospheric convection during substorm events. In this scenario the plasmapause is formed along the surface which is tangent to the Zero-Parallel-Force (ZPF) surface. The time-dependent deformations of the Plasmapause displayed in this film are induced by a Kp-dependent convection electric field model, in response to variations of the level of geomagnetic activity. The dynamical development of "Shoulders" and "Tails" in the equatorial cross section of the Plasmapause were foreseen in these simulations.

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Relevant references:
Lemaire J. [1974], The "Roche-Limit" of the ionospheric plasma and the formation of the Plasmapause, Planet. Space Sci., 22, 757.
Corcuff Y, P. Corcuff, P, J. Lemaire [1985], Dynamical plasmapause positions during the July 29-31, 1977 storm period: a comparison of observations and time-dependent model calculations, Annales Geophysicae, 3, 569.
Lemaire J., [2000], The formation plasmaspheric tails,
Phys. Chem. Earth (C), 25, 9-17.
Pierrard V., G.V. Khazanov, J. Cabrera, J.F. Lemaire [2007], Influence of the convection electric field models on the predicted plasmapause positions during magnetic storms, Journal of Geophysical Research, 113.
Lemaire J.F., V. Pierrard, [2008] Comparison between two theoretical mechanisms of the plasmapause formation and relevant observations,
Geomagnetizn I Aeronoiya, 48, 5, 579-597, (in Russian)
Geomagnetism and Aeronomy, ISSN 0016-7932, 48, 5, 553-570, (in English)

Lemaire's simulations can be accessed by clicking on ftp link
http://www.aeronomie.be/dist/lemaire/plasmapause-uk.mov

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