Aart Kroon¹, Josephine Arngrimson², Mette Bendixen¹, Kirstine Skov³ and Charlotte Sigsgaard², (1)University of Copenhagen, Department for Geosciences and Natural Resource Management, København K, Denmark, (2)University of Copenhagen, Department for Geosciences and Natural Resource Management, Copenhagen, Denmark, (3)Aarhus University, Arctic Research Center, Roskilde, Denmark