Auroral occurrence from 1963 to 1970 as observed at Dumont d'Urville station

Details Auroral occurrence from 1963 to 1970 as observed at Dumont d'Urville station Auroral occurrence from 1963 to 1970 as observed at Dumont d'Urville station

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986angeo...4..247t&link_type=abstract

Annales Geophysicae, Series A - Upper Atmosphere and Space Sciences, vol. 4, June 1986, p. 247-257. Research sponsored by the Co

Physics

Annual Variations, Antarctic Regions, Auroras, Auroral Electrojets, Diurnal Variations, Electron Precipitation, Geomagnetism, Magnetic Effects, Solar Activity Effects

Scientific paper

An all sky camera is used at Dumont d'Urville station (Antarctica) since 1957. A new data processing, based on the determination of the aurora intensity has been performed. The auroral occurrence is studied in three zones: North, Zenith and South of the station. Several properties of the auroral occurrence are derived: diurnal variation depending upon the season; relation with magnetic activity; occurrences of auroras of different brightnesses; long term and seasonal variations. All results show that the station exhibits mixed features of auroral zone and polar cap types depending upon UT and local magnetic activity. Auroral iso-occurrence lines are derived as a function of magnetic activity and season. The equinox auroral oval appears equatorwards shifted with respect to the winter one. Auroral occurrence and electron precipitation patterns have been compared. Low energy electrons (some keV) seem the most responsible of the observed features.

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