Modeling nightglow in atomic oxygen red and green lines under moderate disturbed geomagnetic conditions at midlatitudes

Abstract

We present results of a study of mid-latitude auroras. The study is based on optical measurements and theoretical modeling. The modeling shows that precipitation can indirectly generate airglow in red and green lines of atomic oxygen by increasing rates of ion formation and heating of thermal electrons. This causes an increase in the rate of dissociative recombination and thermal-electron-collision excitation of the 1D and 1S levels.

Kinetic Alfven Waves Near a Dissipative Layer

“…The electron fluxes calculated by us are larger than those observed by satellites over SAR arcs during strong geomagnetic disturbances (Hong et al, 2020;Mikhalev et al, 2008;Tashchilin & Leonovich, 2016). We can assume that the same mechanism of red-arc excitation is also involved in the recently discovered STEVE (Strong Thermal Emission Velocity Enhancement) events (Chu et al, 2020;Gallardo-Lacourt et al, 2018).…”