Nitrogen partitioning inside the 1997 late winter Arctic vortex, measured by MIPAS-B - Wetzel, G.; Oelhaf, H.; Ruhnke, R.; Friedl-Vallon, F.; Kouker, W.; Maucher, G.; Reddmann, T.; Seefeldner, M.; Seifert, A.; Trieschmann, O.; Clarmann, T. von; Fischer, H. (1999)