Dayside red auroras at very high latitudes - The importance of thermal excitation

Details Dayside red auroras at very high latitudes - The importance of thermal excitation Dayside red auroras at very high latitudes - The importance of thermal excitation

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11..923w&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 11, Sept. 1984, p. 923-926. Research supported by the Centre National de la

Computer Science

Sound

25

Auroras, F Region, Ionospheric Sounding, Oxygen Spectra, Thermal Radiation, Auroral Spectroscopy, Dissociation, Electron Energy, Incoherent Scatter Radar, Ionospheric Electron Density, Radar Measurement

Scientific paper

Extensive radar observations have been made from Sondrestrom of the F region in the daytime sector between 70 and 79 deg. Regions of enhanced electron temperature and electron density are found in close association with the velocity reversal in the morning and afternoon convection cells. From the radar measurements, calculations are made of the contributions to the atomic oxygen emission at 6300A from dissociative recombination and thermal excitation. The latter mechanism, in particular, in the enhancement regions gives rise to intensities that are comparable to those observed at very high latitudes during the past decade.

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