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P: Fachverband Plasmaphysik

P 15: Helmholtz Graduate School II

P 15.1: Poster

Dienstag, 14. März 2017, 16:30–18:30, HS Foyer

Estimation of heating rate values with the multiple airglow chemistry model — •Olexandr Lednyts’kyy and Christian von Savigny — University of Greifswald, Greifswald, Germany

The Multiple Airglow Chemistry (MAC) model based on more than 60 aeronomical reactions was developed to reflect the photochemistry of the identified electronic states of molecular oxygen (O₂). The MAC model was applied in the MLT (upper mesosphere and lower thermosphere) region to calculate heating rate profiles in the MLT and to compare them with the reference profiles extracted from SABER (Sounding of the Atmosphere using Broadband Emission Radiometry) infrared radiometer data. The reference profiles consider heating rates of seven reactions that are important in the energy budget of the mesopause region. The MAC model enables us to estimate the contribution of other processes to the heating of the MLT at night as well. Odd hydrogen and odd oxygen species prevail in the chemical heating in the MLT. Particularly, hydroxyl radical, atomic oxygen and O₂ contribute to the quenching heating.