Other
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980p%26ss...28..595r&link_type=abstract
Planetary and Space Science, vol. 28, June 1980, p. 595-597.
Other
2
Convective Flow, Electric Fields, Interplanetary Magnetic Fields, Polar Caps, Ionospheric Disturbances, Magnetohydrodynamic Flow, Solar Wind, Time Response
Scientific paper
As shown by Iwasaki (1971); Maezawa (1976); Kuznetsov and Troshichev (1977) and other investigators, the electric field and the plasma convection in the polar cap change their direction after an appearance of a significant northward component of the interplanetary magnetic field. Two possible mechanisms of this phenomenon may be suggested: (1) the direct penetration of the dusk-to-dawn electric field from the solar wind into the magnetosphere, and (2) the generation of the observed electric field and convection in a process of the decay of the three-dimensional current system which existed before the appearance of the northward interplanetary field. The latter mechanism implies that the value of the electric field generated in the polar cap will decrease with time after the appearance of the northward interplanetary magnetic field. The results of the experimental investigation show such a decrease which favors the second mechanism.
Liatskii V. B.
Maltsev Iu. P.
Rezhenov B. V.
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