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