Polar cusp ion drift studies through high-resolution interferometry of O/plus/ 7320-A emission

Details Polar cusp ion drift studies through high-resolution interferometry of O/plus/ 7320-A emission Polar cusp ion drift studies through high-resolution interferometry of O/plus/ 7320-A emission

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.4455s&link_type=abstract

Journal of Geophysical Research, vol. 87, June 1, 1982, p. 4455-4460. Research supported by the Great Norwegian Spitzbergen Coa

Physics

23

Auroral Ionization, Doppler Effect, F Region, Fabry-Perot Interferometers, Ionospheric Drift, Oxygen Ions, Oxygen Spectra, Polar Cusps, Polar Regions, Atomic Excitations, Auroral Spectroscopy, Convective Flow, Electron Impact, Electron Precipitation, High Resolution, Hydroxyl Radicals, Molecular Rotation

Scientific paper

High-resolution Fabry-Perot interferometric measurements of Doppler shifts in the O(plus) emissions from daytime polar cusp auroras over Longyearbyen, Svalbard, during the winter of 1980-81, are presented to illustrate some temporal aspects of polar F region ion drifts. Doppler measurements of the 7320 A source presented in this paper show some of the features expected of a pass under the throat region of a twin cell convection pattern. The dayside limits of the morning and evening convection cells can be discerned, but the expected strong poleward flow near local noon is not present. Changes in the O(plus) 7320 A intensity observed in the cusp region are consistent with satellite particle data which show very soft electrons precipitating around magnetic noon and relatively more energetic electrons outside this period.

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