Abstract
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.
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Original Russian Text © I.B. Ievenko, V.N. Alekseev, S.G. Parnikov, 2011, published in Geomagnetizm i Aeronomiya, 2011, Vol. 51, No. 5, pp. 702–707.
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Ievenko, I.B., Alekseev, V.N. & Parnikov, S.G. Influence of the solar UV-radiation intensity on the 630-nm nightglow emission in the 23rd solar cycle. Geomagn. Aeron. 51, 688–693 (2011). https://doi.org/10.1134/S0016793211050069
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DOI: https://doi.org/10.1134/S0016793211050069