Study of the antarctic vortex split-up in September/October 2002 by means of trace species from MIPAS/ENVISAT - Glatthor, N.; Clarmann, T. von; Fischer, H.; Funke, B.; Grabowski, U.; Höpfner, M.; Kellmann, S.; Kiefer, M.; Linden, A.; Milz, M.; Steck, T.; Stiller, G. P.; et al. (2003)