[1
]Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) Potsdam
Germany
[2
]Melnikov Permafrost InstituteSiberian Branch, Russian Academy of Sciences Yakutsk
Russia
[3
]U.S. Geological Survey Woods Hole MA USA
[4
]Earth Cryosphere Institute of Tyumen Scientific CenterSiberian Branch, Russian Academy
of Sciences and Tyumen State University Tyumen Russia
[5
]Institute for Space SciencesFreie Universität Berlin Berlin Germany
[6
]Geoscience DepartmentUniversity of Oslo Oslo Norway