Abstract
The effect of anomalously high average nighttime intensities of the atomic oxygen 557.7-nm atmospheric emission (luminescence heights 85–115 km) during sudden winter stratospheric warming events (SWEs) in Eastern Siberia is considered. Analysis of the variations in the 557.7-nm emission intensity (I 557.7) revealed the interdaily I 557.7-nm variations during SWEs and high average monthly I 557.7-nm values in the winter months in conditions of high solar activity. It has finally been found that the variations with periods of several days, at a maximum of which anomalously high daily values of I 557.7 are observed, are superposed on the average I 557.7-level during SWEs at high solar activity. A high average level of I 557.7 in the winter months in Eastern Siberia can be related to the fact that the atomic oxygen concentration at altitudes of the 557.7 nm emission luminescence increases by a factor of 2–3 in years of high solar activity.
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Original Russian Text © A.V. Mikhalev, 2010, published in Solnechno-Zemnaya Fizika, 2010, Vol. 15, pp. 127–130.
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Mikhalev, A.V. Variations in the 557.7-nm atmospheric emission during stratospheric warming events under conditions of high and low solar activity. Geomagn. Aeron. 50, 1021–1024 (2010). https://doi.org/10.1134/S001679321008013X
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DOI: https://doi.org/10.1134/S001679321008013X