Stratospheric ClONO₂ and HNO₃ profiles inside the Arctic vortex from MIPAS-B limb emission spectra obtained during EASOE - Oelhaf, H.; Clarmann, T. von; Fischer, H.; Friedl-Vallon, F.; Fritzsche, Ch.; Linden, A.; Piesch, C.; Seefeldner, M.; Völker, W. (1999)