Articles | Volume 39, issue 1
ANGEO Communicates
26 Feb 2021
ANGEO Communicates |  | 26 Feb 2021

Semi-annual variation of excited hydroxyl emission at mid-latitudes

Mykhaylo Grygalashvyly, Alexander I. Pogoreltsev, Alexey B. Andreyev, Sergei P. Smyshlyaev, and Gerd R. Sonnemann

Data sets

Grygalashvyly_et_al_ANGEO_2020 M. Grygalashvyly 2020

Short summary
Ground-based observations show a phase shift in semi-annual variation of excited hydroxyl emissions at mid-latitudes compared to those at low latitudes. This differs from the annual cycle at high latitudes. We found that this shift in the semi-annual cycle is determined mainly by the superposition of annual variations of T and O concentration. The winter peak for emission is determined exclusively by atomic oxygen concentration, whereas the summer peak is the superposition of all impacts.