Diurnal variations of reactive chlorine and nitrogen oxides observed by MIPAS-B inside the January 2010 Arctic vortex - Wetzel, G.; Oelhaf, H.; Kirner, O.; F. Friedl-Vallon; Ruhnke, R.; Ebersoldt, A.; Kleinert, A.; Maucher, G.; Nordmeyer, H.; Orphal, J. (European Geosciences Union, 2014)