Large plasma velocities along the magnetic field line in the auroral zone

Details Large plasma velocities along the magnetic field line in the auroral zone Large plasma velocities along the magnetic field line in the auroral zone

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.336..231j&link_type=abstract

Nature (ISSN 0028-0836), vol. 336, Nov. 17, 1988, p. 231, 232.

Physics

34

Auroral Zones, Geomagnetism, Lines Of Force, Magnetosphere-Ionosphere Coupling, Plasma Dynamics, Velocity Distribution, Atmospheric Electricity, Eiscat Radar System (Europe), Night Sky

Scientific paper

Observations of substantial upward acceleration of ionospheric plasma in the auroral zone, to velocities as high as 500 m/s, are reported. An initial upthrust was provided by a combined upwelling of the neutral atmosphere and ionosphere but the continued acceleration at greater heights is explained by a combination of enhanced plasma pressure and the 'hydrodynamic mirror force'. This acceleration marks an important stage in the transport of plasma from the ionosphere into the magnetosphere.

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