Berlin 2014 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 5: Postersitzung

EP 5.4: Poster

Dienstag, 18. März 2014, 16:30–18:30, DO24 Foyer

Solar induced interannual variability of ozone — •Tilo Fytterer, Miriam Sinnhuber, and Gabriele Stiller — Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Measurements by the Michelson Interferometer for Passive Atmospheric Sounding instrument on board the ENVIromental SATellite from 2005 - 2011 are used to investigate the impact of solar and geomagnetic activity on O3 in the stratosphere and mesosphere inside the Antarctic polar vortex. Observations of NOy in the Antarctic upper stratosphere/mesosphere and the Ap index have shown a positive correlation. Therefore, a link between high energetic particles, mainly originating from the sun, and the destruction of O3 in the presence of solar radiation due to catalytic chemical reactions with odd nitrogen (N+NO+NO2) and odd hydrogen (H+OH+HO2) is suggested. Thus in this study, correlation analysis between a 26 days average centred at 1 Apr, 1 May and 1 Jun of several solar/geomagnetic indices (Ap, F10.7 cm solar radio flux, Lyman-a, 2 MeV electrons flux) and 26 day running means from 1 Apr - 1 Nov of O3 in the altitude range from 20-70 km were performed. The results reveal negative correlation coefficients propagating downward throughout the polar winter, at least for the Ap index and the 2 MeV electrons flux. Comparisons with Saber and Odin/SMR O3 data are in moderate agreement, also showing a descending negative signal in either indices, but only for the correlation with 1 Apr.