A climatology of polar stratospheric cloud composition between 2002 and 2012 based on MIPAS/Envisat observations - Spang, R.; Hoffmann, L.; Müller, R.; Grooß, J.-U.; Tritscher, I.; Höpfner, M.; Pitts, M.; Orr, A.; Riese, M. (Atmos. Chem. Phys., 2018)