Erlangen 2018 – wissenschaftliches Programm
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UP: Fachverband Umweltphysik
UP 8: Methods - measurement techniques; Atmosphere - trace gases, mesosphere
UP 8.3: Vortrag
Mittwoch, 7. März 2018, 14:30–14:45, G 1.011
Night-time atomic oxygen in the mesopause region derived from satellite observations of atmospheric airglow — •Tilo Fytterer1, Miriam Sinnhuber1, and Christian von Savigny2 — 1Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany — 2Institute of Physics, Ernst-Moritz-Arndt-Universität Greifswald, Greifswald, Germany
Atomic oxygen in its ground state [O(3P)] is involved in several exothermic reactions and collisions with CO2 and contributes to both heating and cooling rates in the mesopause region (80-100 km). Therefore, O(3P) has a strong impact on the general energy budget of the mesopause region, eventually affecting further quantities like air temperature and the wind. However, direct observations of O(3P) are relatively rare, and consequently O(3P) had to be indirectly derived from the atmospheric light emissions which are known as airglow and are observable by satellite instruments. Here, we present results of night-time O(3P) in the mesopause region by using a zero dimensional model which was adapted to match atmospheric OH airglow observations from 2003 to 2011. The measured OH transitions are obtained from the satellite/instrument configuration TIMED/SABER [OH(9-7)+OH(8-6) and OH(5-3)+OH(4-2)] and ENVISAT/SCIAMACHY [OH(6-2) and OH(3-1)].