Bremen 2017 – scientific programme

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UP: Fachverband Umweltphysik

UP 21: Atmosphäre - Mesosphäre

UP 21.2: Talk

Friday, March 17, 2017, 12:00–12:15, GW2 B3009

Validation of the multiple airglow chemistry model with in-situ measurements — •Olexandr Lednyts’kyy and Christian von Savigny — University of Greifswald, Greifswald, Germany

The developed Multiple Airglow Chemistry (MAC) model is based on more than 60 aeronomical reactions used to reflect the photochemistry of the identified electronic states of molecular oxygen (O₂) in the MLT (upper mesosphere and lower thermosphere) region. The MAC model is validated with rocket in-situ measurements and SABER (Sounding of the Atmosphere using Broadband Emission Radiometry) infrared radiometer data of nightglow observed in January 2004. The previously performed near-global retrieval of atomic oxygen concentration ([O]) profiles in the MLT region with help of SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY) nightglow observations was based on the well-known cubic equation and the extended cubic equation used to reflect the photochemistry of the not identified O₂ electronic states in 12 aeronomical reactions. The coefficients of the well-known cubic equation were initially derived with use of the in-situ measurements of the ETON (Energy Transfer in the Oxygen Nightglow) rocket campaign conducted in March 1982. The results of the [O] retrieval according to the used models and approaches are compared with each other and with the in-situ measurements of [O]. The retrieved volume emission rate (VER) profiles agree with the measured VER profiles very well. Chemical heating rate profiles were estimated and compared with the reference SABER profiles.