Possible evidence of flux transfer events in the polar ionosphere

Details Possible evidence of flux transfer events in the polar ionosphere Possible evidence of flux transfer events in the polar ionosphere

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13.1089l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, Nov. 1986, p. 1089-1092. DOE-supported research.

Physics

106

Earth Ionosphere, Geomagnetism, Magnetopause, Polar Regions, Field Aligned Currents, Interplanetary Magnetic Fields, Magnetic Field Reconnection, Magnetic Flux, Magnetohydrodynamic Waves

Scientific paper

Magnetic field data from the cusp-latitude South Pole station are presented that exhibit, under appropriate local time and interplanetary magnetic field conditions, the signature expected in the ionosphere from a flux transfer event at the magnetopause. In particular, the model of multiple X-line reconnection at the magnetopause predicts field-aligned currents in helical flux tubes, with transverse magnetic fields propagating as Alfven waves toward the ionosphere. The distinctive magnetic signature at a polar cap magnetic station, particularly in the vertical component, can be used to infer the signs of the By and Bz components of the interplanetary magnetic field.

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