Average patterns of precipitation and plasma flow in the plasma sheet flux tubes during steady magnetospheric convection

Details Average patterns of precipitation and plasma flow in the plasma sheet flux tubes during steady magnetospheric convection Average patterns of precipitation and plasma flow in the plasma sheet flux tubes during steady magnetospheric convection

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38..355s&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 38, March 1990, p. 355-363.

Computer Science

19

Auroral Zones, Magnetohydrodynamic Flow, Magnetosphere-Ionosphere Coupling, Particle Precipitation, Plasma Drift, Plasma Sheaths, Convection, Field Aligned Currents, International Sun Earth Explorers, Magnetic Storms, Nocturnal Variations

Scientific paper

Average patterns of plasma drifts and auroral precipitation in the nightside auroral zone were constructed during a steady magnetospheric convection (SMC) event on February 19, 1978. By comparing these patterns with the measurements in the midtail plasma sheet made by ISEE-1, and using the corresponding magnetic field model, the following features are inferred: (1) the concentration of the earthward convection in the midnight portion of the plasma sheet (convection jet); (2) the depleted plasma energy content of the flux tubes in the convection jet region; and (3) the Region-1 field-aligned currents generated in the midtail plasma sheet. It is argued that these three elements are mutually consistent features appearing in the process of ionosphere-magnetosphere interaction during SMC periods. These configurational characteristics resemble the corresponding features of substorm expansions (enhanced convection and 'dipolarized' magnetic field within the substorm current wedge) and appear to play the same role in regulating the plasma flow in the flux tubes connected to the plasma sheet.

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