Vol. 30, issue 11, article # 12

Abstract:

We examine variations in airglow in the 555.7 nm atomic oxygen line and the ONI index of the El Niño Southern Oscillation (ENSO) phenomenon in 1997–2017. Correlation between these parameters is revealed. During the prolonged La Niña episode of 1991–2001, the 557.7 nm emission depression was observed, where as in the extreme El Niño episode of 2015–2016, the 557.7 nm emission increased. We discuss possible mechanisms of the ENSO phenomenon effect on the airglow. A tentative conclusion has been made that long-term and interannual intensity variations in the 557.7 nm emission can result from the joint effect of solar activity and changes in the global atmospheric circulation.

Keywords:

airglow, 557.7 nm emission, El Niño/La Niña

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