The Arctic UTLS in winter&spring: Chemical and dynamical aspects as derived from GLORIA observations during the POLSTRACC mission - Oelhaf, Hermann; Braun, Marleen; Team, POLSTRACC; Friedl-Vallon, Felix; Grooss, Jens-Uwe; Höpfner, Michael; Johansson, Sören; Preusse, Peter; Sinnhuber, Björn-Martin; Ungermann, Jörn; Woiwode, Wolfgang (2018)