SPECTRAL STUDIES OF AURORAS IN THE POLAR CAPS OF NORTHERN AND SOUTHERN HEMISPHERES OF THE EARTH DURING THE IGY, AS WELL AS IN SPITSBERGEN ON THE EVE OF THE IHY

• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Antarctic; Arctic; Mirny; Antarc*; Spitsbergen
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.534.7322; http://pgia.ru/seminar/archive/2007/2_fields/yevlashin_l_s.pdf

Abstract. In 1957-59 within the framework of the International Geophysical Year (IGY) (the period of a very high solar activity) spectral observations of auroras were carried out in the USSR at stations of Heiss island, Pyramida (Arctic), Mirny, Vostok (Antarctic), using C-180-S cameras, designed by prof. A.I.Lebedinsky. Based on a unified programme (photographic film Dn, exposure time 10 minutes, spectral resolution of 5 nm) registrations of auroral spectra were carried out in the dark time of the day in autumn, winter and spring. The films development was centralized and the obtained materials were collected at the World Data Center ICD-B2 in Moscow. The photometric processing was carried out at the Auroral Laboratory of the PGI. There were registered the basic emissions of auroras: 630.0 nm, 557.7 nm, 427.8 nm and 319.4 nm on spectra of auroras with the intensity of I – II IBC points. At the visual comparative evaluation of intensities of emissions 630.0 nm and 557.7 nm it turned out that the number of spectra, in which the red line 630.0 nm exceeded the green one 557.7 nm more than 2 times and more at all the stations, was very significant (on the average – 60%) This testified of the fact that during that period the number of auroras prevailed in the polar caps, which conventionally could have been referred to red auroras of type A, although, the observers of forms of auroras visually estimated them as light-green ones. In December-January 2005-2006 (the minimum of solar activity) a spectral camera, designed in the PGI (CCD All-