Relationships between ionospheric and tail phenomena

Details Relationships between ionospheric and tail phenomena Relationships between ionospheric and tail phenomena

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991esasp.330..191p&link_type=abstract

In ESA, Cluster Dayside Polar Cusp p 191-201 (SEE N92-26294 17-46)

Computer Science

Convection, Earth Ionosphere, Geomagnetic Tail, Magnetic Storms, Mapping, Auroras, Cluster Mission, Flux Density, Space Plasmas

Scientific paper

Large scale processes taking place in the magnetotail and their consequences upon the ionosphere are addressed. The topics were selected in the light of the new information that can be expected from the Cluster mission and from the associated ground based measurements. Plasma convection is discussed, in particular, an attempt is made to establish the link between the classical picture of the convection at the ionospheric level and its magnetospheric projection. It is shown that Cluster can help to determine the location and the shape of the Harang discontinuity in the magnetosphere provided that the spacecraft are close enough to the Earth. The existence of the steady state convection is questioned in light of recent models. The relation between convection and magnetic activity is discussed. The mapping between auroral arcs and the various magnetospheric boundaries is investigated. Plasma dynamics in the midtail and in the inner plasma sheet is described with particular emphasis on some of the models proposed for substorms. Suggestions are made about complementary measurements to be performed by Cluster and ground based instruments to understand plasma circulation in the magnetosphere and its relation to substorms.

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