Heidelberg 2015 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 4: Postersession Atmosphäre

UP 4.3: Poster

Mittwoch, 25. März 2015, 10:45–19:45, G/Foyer

Characterizing variability in OH * emission altitudes during the last solar cycle retrieved from SCIAMACHY nightglow observations — •Georg Teiser1, Christian von Savigny1, and Holger Winkler21Institute of Physics, Ernst-Moritz-Arndt-Universität Greifswald, Felix-Hausdorff-Str. 6, 17489 Greifswald — 2Institute of Environmental Physics, University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen

Hydroxyl nightglow observations are a fundamental tool to study the mesosphere. In particular the knowledge of the spatial and temporal variability of the OH* nightglow emission altitude is of importance for the interpretation of ground-based OH temperature measurements. In this context the OH* nightglow data set from SCIAMACHY (Scanning Imaging Absorption spectrometer for Atmospheric CHartographY) on Envisat (from August 2002 to December 2012) is analyzed for 11-year solar cycle signatures and short-term variability, e.g. solar-driven 27-day cycle and QBO (Quasi-Biennial Oscillation) signatures in vertical volume emission rate profiles and mean emission altitude of the OH(3*1) Meinel emission near the mesopause. Additionally, first results of investigation of the effect of SPEs (solar proton events ) on the OH Meinel emission altitude and the comparison with simulations using the UBIC (University of Bremen Ion Chemistry) model are presented.

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