GLORIA observations of de-/nitrification during the Arctic winter 2015/16 POLSTRACC campaing - Braun, B.; Woiwode, W.; Khosrawi, F.; Kirner, O.; Marsing, A.; Sinnhuber, B.-M.; Voigt, Ch.; Ziereis, H.; Orphal, J.; GLORIA, T.; Höpfner, M.; Johansson, S.; et al. (2017)