Dependence of the polar cap geometry on the IMF

Details Dependence of the polar cap geometry on the IMF Dependence of the polar cap geometry on the IMF

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32..111a&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 32, Jan. 1984, p. 111-118.

Computer Science

19

Auroral Arcs, Interplanetary Magnetic Fields, Lines Of Force, Magnetic Field Configurations, Polar Caps, Atmospheric Models, Auroral Zones, Earth Magnetosphere

Scientific paper

The geometry of the open field line region in the polar region is computed for a variety of the interplanetary magnetic field (IMF) orientation. The open field line region can be identified as the area bounded by the auroral oval, namely the polar cap. The polar cap geometry varies considerably with the orientation of the IMF and magnitude, particularly when the IMF Bz component is positive and large. The corresponding exit points of the open field lines on the magnetopause are also examined. The results are useful in interpreting various upper atmospheric phenomena in the highest latitude region of the earth and also in observing chemical releases outside the magnetopause.

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