Vertical profiles of reactive nitrogen (NOsub(y)) inside the 2003 late winter arctic vortex, measured by MIPAS-B - Wetzel, G.; Oelhaf, H.; Ruhnke, R.; Wiegele, A.; Friedl-Vallon, F.; Höpfner, M.; Kleinert, A.; Lengel, A.; Maucher, G.; Zhang, G.; Fischer, H. (2004)