Abstract
Variations in airglow in the 555.7 nm atomic oxygen line and the ONI index of the El Nino Southern Oscillation (ENSO) phenomenon in 1997–2017 are analyzed. A correlation between these parameters is revealed. During the prolonged La Nina episode of 1999–2001, the 557.7-nm emission depression was observed, whereas in the extreme El Nino episode of 2015–2016, the 557.7-nm emission increased. A possible effect of the ENSO phenomenon on the airglow is considered. A tentative conclusion is drawn that longterm and interannual variations in the 557.7-nm emission intensity can result from the joint effect of solar activity and changes in the global atmospheric circulation.
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