Julie Lattaud, Stockholm University, Department of Environmental Sciences, Stockholm, Sweden, Lukas Bigler, Stockholm University, Environmental Science, Stockholm, Sweden, Julek Chawarski, ASL Environmental Sciences, Victoria, BC, Canada; Stockholm University, Bolin Center for Climate Research, Stockholm, Sweden, Negar Haghipour, ETH, Ion Beam Physics, Zürich, Switzerland, Flor Vermassen, Stockholm University, Department of Geological Sciences, Stockholm, Sweden; Bolin Centre for Climate Research, Stockholm, Sweden and Jakob Zopfi, University of Basel, Department of Environmental Sciences, Basel, Switzerland