Heidelberg 2015 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 4: Postersession Atmosphäre

UP 4.8: Poster

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

Simultaneous balloon-borne measurements of the key inorganic bromine species BrO and BrONO2 in the stratosphere: MIPAS evaluation — •Gerald Wetzel1, Hermann Oelhaf1, Felix Friedl-Vallon1, Andreas Ebersoldt2, Thomas Gulde1, Michael Höpfner1, Anne Kleinert1, Guido Maucher1, Hans Nordmeyer1, and Johannes Orphal11Karlsruhe Institute of Technology, Institute for Meteorology and Climate Research, Karlsruhe, Germany — 2Karlsruhe Institute of Technology, Institute for Data Processing and Electronics, Karlsruhe, Germany

Despite being much less abundant, the contribution of bromine to stratospheric ozone depletion is similar to that of chlorine. The two major inorganic bromine species in the lower stratosphere are bromine oxide (BrO) and bromine nitrate (BrONO2). While BrO has first been observed around 20 years ago, BrONO2 has been detected by satellite limb observations in the mid-infrared spectral region only recently (in 2008). Dedicated to the simultaneous observation of BrO and BrONO2 including their diurnal variability, a balloon campaign took place from Timmins, Canada in September 2014. The remote sounding instrumentation consisted of three spectrometers covering the UV-VIS, the mid-infrared and the microwave spectral region. In this contribution we present the first results from the Michelson Interferometer for Passive Atmospheric Sounding Balloon-borne version 2 (MIPAS-B2): time- and height-dependent distributions of BrONO2 and NO2 volume mixing ratios together with a comprehensive error estimation and further diagnostic parameters of the inversion procedure.

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