Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, Dorsoduro 2137, Venice, Italy; Institute for Dynamics of Environmental Processes - CNR, University of Venice, Dorsoduro 2137, Venice, Italy; Institute of Geology, Tallinn University of Technology, Ehitajate tee 5, Tallinn, Estonia; Norwegian Polar Institute, Fram Centre, Hjalmar Johansens gt. 14, Tromsø, Norway; Department of Geosciences, University of Oslo, P.O. Box 1047, Blindern, Oslo, Norway; Centre for Ice and Climate, Niels Bohr Institute, Juliane Maries Vej 30, Copenhagen, Denmark; Department of Imaging and Applied Physics, Curtin University, Kent St, Bentley, WA, Australia; School of Chemistry, University of Leeds, Leeds, United Kingdom