Computer Science
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29...79c&link_type=abstract
Planetary and Space Science, vol. 29, Jan. 1981, p. 79-96.
Computer Science
208
Atmospheric Models, Earth Magnetosphere, Interplanetary Magnetic Fields, Magnetic Field Configurations, Asymmetry, Geomagnetic Tail, Lines Of Force, Torque
Scientific paper
Observed magnetospheric asymmetries occurring in response to the y-component of the interplanetary magnetic field (IMF) are discussed in terms of the open model of the magnetosphere. It is noted that the torque which the IMF exerts on the magnetosphere about the earth-sun axis results in asymmetric addition of open flux tubes to the tail lobes about the noon-midnight meridian. Because of this, an IMF-associated B sub y field appears across the tail lobes. It is noted that the ratio between internal and external B sub y fields will generally be the same as the ratio between internal and external electric fields. An explanation is given of the asymmetry in tail lobe electric field and plasma populations. Simple open tail lobe models are derived that demonstrate the asymmetry effects. It is shown that the observed asymmetry effects on closed (auroral zone) field lines may be at least qualitatively explained if the cross-magnetosphere IMF-associated B sub y field pervades not only the open but also the closed field line regime, as may be generally expected.
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