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UP: Fachverband Umweltphysik

UP 9: Aerosols

UP 9.5: Vortrag

Donnerstag, 19. März 2020, 15:20–15:40, HSZ 105

Estimating the impact of volcanic eruptions on the thermal structure of the mesosphere and lower thermosphere by analyzing HALOE temperature data — •Sandra Peglow, Anne Krüger, Christoph Hoffmann, and Christian von Savigny — University Greifswald, Felix-Hausdorff-Str. 6, 17489 Greifswald

A paper published in 1998 by She et al. [1] analyzed lidar temperature profiles and reported an episodic warming of the mesopause region that peaked in 1993 and was attributed by the authors to a delayed response from the Pinatubo eruption in 1991. A considerable temperature increase with a magnitude up to 12.9 K in 100 km altitude was observed. The hypothesized correlation between the tropical volcanic eruption of the Mount Pinatubo and the temperature in the mesopause region needs further investigation. Therefore, temperature data from the Halogen Occultation Experiment (HALOE) on the Upper Atmosphere Research Satellite is currently used to extract temperature variations in the middle atmosphere considering seasonal, solar and volcanic contributions. This study provides a critical comparison with the magnitude and position of the perturbation reported by She et al. [1] C. Y. She, Steven W. Thiel, and David A. Krueger. Observed episodic warming at 86 and 100 km between 1990 and 1997: Effects of mount pinatubo eruption. Geophysical Research Letters, 25(4):497*500, 1998.