Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ge%26ae..51..688i&link_type=abstract
Geomagnetism and Aeronomy, Volume 51, Issue 5, pp.688-693
Physics
Scientific paper
It is well known that the 630-nm nightglow emission intensity in midlatitudes increases by more than a factor of 2 during a sunspot maximum. It has been assumed that the phenomenon is caused by variations in solar UV radiation during a solar cycle (Fishkova, 1983). We present the results of photometric measurements of the nightglow 630.0 nm emission intensity at a latitude of 63° E and longitude of 130° E (Yakutsk) in 1990-2007. The dependence of the 630-nm emission intensity on solar activity on magnetically quiet days in the 22nd and 23rd solar cycles is shown. The close relationship between the 630-nm nightglow intensity and the intensity of extreme UV (EUV) with a correlation coefficient of 0.8-0.9 in 1997-2007 is ascertained from the SOHO/SEM data. The dominance of solar EUV in the excitation of nightglow 630-nm emission has thus been experimentally proved.
Alekseev N. V.
Ievenko I. B.
Parnikov S. G.
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