Chlorine de-/activation during the Arctic winter 2015/2016 POLSTRAC campaign observed with GLORIA - Johansson, S; Woiwode, W.; Höpfner, M.; Friedl-Vallon, F.; Ungermann, Jörn; Grooss, Jens-Uwe; Santee, M. L.; Jurkat, T.; Walker, K. A. (Soc., 2018)