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Source of the Observed Enhancements in Thermospheric ΣO/N₂ During Two Solar Eclipses in 2023

Zhang, Y.; Cantrall, C. E.; Mrak, S. +4 more

Two solar eclipse events in 2023 appeared to produce considerable enhancements in the thermospheric column density ratio of monatomic oxygen to molecular nitrogen (ΣO/N₂) as measured by TIMED GUVI. We quantify potential sources for eclipse-induced ΣO/N₂ changes and find that the observed enhancements arise from the ionospheri…