Dehydration in the Arctic stratosphere during the THESEO 2000 / SOLVE campaigns - Schiller, C.; Bauer, R.; Ovarlez, J.; Stroh, F.; Wetter, T.; Beuermann, F.; Cairo, T.; Deshler, A.; Doernbrack, A.; Engel, A.; Fix, A.; Müller, M.; et al. (2000)