

10Institute of Northern Engineering, University of Alaska Fairbanks, Fairbanks, AK, United States.9Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden.8Department of Physical Geography, Stockholm University, Stockholm, Sweden.7Scientist Emeritus, Formerly United States Geological Survey, Menlo Park, CA, United States.6Laboratory of General Geocryology, Melnikov Permafrost Institute, Yakutsk, Russia.5Institute of Geosciences, University of Potsdam, Potsdam, Germany.

4Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada.3Geography Department, Université de Montréal, Montréal, QC, Canada.2Laboratory of Permafrost Landscapes, Melnikov Permafrost Institute, Yakutsk, Russia.1Permafrost Research Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany.Jongejans 1,5, Mikhail Kanevskiy 10, Alexander Kholodov 11, Viktor Kunitsky 6, Gleb Kraev 12,13, Anatoly Lozhkin 14, Elizaveta Rivkina 15, Yuri Shur 10, Christine Siegert 1, Valentin Spektor 6, Irina Streletskaya 16, Mathias Ulrich 17, Sergey Vartanyan 14, Alexandra Veremeeva 15, Katey Walter Anthony 10, Sebastian Wetterich 1, Nikita Zimov 18 and Guido Grosse 1,5 Fedorov 2, Daniel Fortier 3, Duane Froese 4, Matthias Fuchs 1, Frank Günther 1,5, Mikhail Grigoriev 6, Jennifer Harden 7, Gustaf Hugelius 8,9, Loeka L. Jens Strauss 1*, Sebastian Laboor 1, Lutz Schirrmeister 1, Alexander N.
