Physics
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.318..451r&link_type=abstract
Nature (ISSN 0028-0836), vol. 318, Dec. 5, 1985, p. 451, 452. SERC-supported research.
Physics
28
Ampte (Satellites), Eiscat Radar System (Europe), Interplanetary Magnetic Fields, Ionospheric Heating, Solar Terrestrial Interactions, Magnetic Field Reconnection, Magnetohydrodynamic Flow, Plasma Acceleration, Plasma Drift
Scientific paper
A major question in solar-terrestrial physics concerns the nature of the interaction between the solar wind and the earth's magnetosphere and ionosphere, and how this depends on the direction of the interplanetary magnetic field (IMF). Simultaneous observations are reported of the IMF by the AMPTE-UKS (Active Magnetospheric Particle Tracer Explorers-UK Satellite), and of plasma flow in the high-latitude ionosphere by the EISCAT radar with better time resolution than has been achieved hitherto. One event is discussed in which a sharp southwards turning of the IMF is followed by the onset of rapid ionospheric plasma flow near local noon, demonstrating the close control of ionospheric flows by the IMF. The causes of the observed 13-min delay are discussed, and the ionospheric heating that accompanies the acceleration is studied.
Cowley Stan W. H.
Risbeth H.
Smith Robert P.
van Eyken Anthony P.
Willis David M.
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