Observation of CIO by MIPAS/ENVISAT before and during the Antarctic vortex split in September/October 2002 - Glatthor, N.; Clarmann, T. von; Fischer, H.; Grabowski, U.; Höpfner, M.; Kellmann, S.; Kiefer, M.; Linden, A.; Milz, M.; Steck, T.; Stiller, G. P.; Mengistu Tsidu, G.; et al. (2004)