Elise Devoie¹, Ryan Connon², James R Craig¹, William L Quinton³ and Olivia Carpino³, (1)University of Waterloo, Department of Civil and Environmental Engineering, Waterloo, ON, Canada, (2)Government of the Northwest Territories, Environment and Natural Resources, Yellowknife, NT, Canada, (3)Wilfrid Laurier University, Cold Regions Research Centre, Waterloo, ON, Canada

Clayton Elder¹, David R Thompson², Andrew K Thorpe², Philip Hanke³, Nicholas Hasson^4,5, David Olefeldt^6,7, Katey M Walter Anthony³ and Charles E Miller², (1)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (2)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (3)University of Alaska Fairbanks, Water and Environmental Research Center, Fairbanks, AK, United States, (4)Fairbanks, Alaska, United States, (5)University of Alaska Fairbanks, Fairbanks, AK, United States, (6)University of Guelph, Guelph, ON, Canada, (7)University of Alberta, Department of Renewable Resources, Edmonton, AB, Canada

Bradley Gay^1,2, Amanda Hildt Armstrong³, Paul M Montesano⁴, Batuhan Osmanoglu⁵, Kenneth Ranson⁵ and Howard E Epstein⁶, (1)NASA Goddard Space Flight Center, Greenbelt, VA, United States, (2)George Mason University Fairfax, Fairfax, VA, United States, (3)Universities Space Research Association Columbia, Columbia, MD, United States, (4)NASA Goddard Space Flight Center | SSAI, Greenbelt, MD, United States, (5)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (6)University of Virginia, Charlottesville, VA, United States

Gleb Kraev, Russian Academy of Sciences, Institute of Physicochemical and Biological Problems of Soil Science, Moscow, Russia, Soil Cryology, Pushchino, Russia, Andrei Belonosov, Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Tyumen, Russia, Alexandra Veremeeva, Russian Academy of Sciences, Pushchino, Pushchino, Russia, Vasilii Grabovsky, Center of Forest Ecology and Productivity of the Russian Academy of Sciences, Moscow, Russia, Ivan Shelokhov, Institute of the Earth Crust SB RAS, Irkutsk, Russia, Alexander Smirnov, Industrial University of Tyumen, Tyumen, Russia and Share of the deep-Earth methane and the biogeochemical cycle in permafrost zone

Victoria Martin¹, Julia Wagner², Niek Speetjens³, Rachele Lodi⁴, Carolina Urbina Malo⁵, Julia Horak⁶, George Tanski⁷, Moritz Mohrlok⁶, Michael Fritz⁸, Hugues Lantuit⁹, Cornelia Rottensteiner⁶, Gustaf Hugelius¹⁰, Willeke A' Campo¹¹, Andreas Richter⁵ and Luca Durstewitz¹¹, (1)University of Vienna, Department of Microbiology and Ecosystem Science, Terrestrial Ecosystem Research, Vienna, Austria, (2)Stockholm University, Stockholm, Sweden, (3)Department of Earth and Climate, Vrije Universiteit Amsterdam, Netherlands, Amsterdam, Netherlands, (4)National Research Council, Institute of Polar Science, Venecia Mestre, Italy, Venecia, Italy, (5)University of Vienna, Department of Microbiology and Ecosystem Science, Vienna, Austria, (6)University of Vienna, Department of Microbiology and Ecosystem Science, Wien, Austria, Vienna, Austria, (7)Vrije Universiteit Amsterdam, Amsterdam, Netherlands, (8)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Potsdam, Germany, (9)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Permafrost Research Section, Potsdam, Germany, (10)Stockholm University, Department of Physical Geography, Stockholm, Sweden, (11)Department of Physical Geography, Stockholm University, Sweden, Stockholm, Sweden

Lorna I Harris, University of Alberta, Edmonton, AB, Canada, David Olefeldt, University of Alberta, Department of Renewable Resources, Edmonton, AB, Canada, Nicolas Pelletier, University of Montreal, Montreal, QC, Canada; Carleton University, Ottawa, ON, Canada, Christian Blodau, University of Münster, Münster, Germany, Klaus-Holger Knorr, University of Muenster, Muenster, Germany, Julie Talbot, University of Montreal, Département de géographie & Geotop, Montreal, QC, Canada and Merritt R Turetsky, University of Guelph, Guelph, ON, Canada; Institute of Arctic and Alpine Research, Boulder, United States

Erin MacDonald^1,2, Suzanne Tank³, Duane G Froese⁴, Steve Kokelj⁵, Brian D Lanoil², Alireza Saidi-Mehrabad³ and Ryan H.S. Hutchins⁶, (1)Woods Hole Research Center, Arctic Carbon Monitoring Program, Falmouth, United States, (2)University of Alberta, Biological Sciences, Edmonton, AB, Canada, (3)University of Alberta, Department of Biological Sciences, Edmonton, AB, Canada, (4)University of Alberta, Department of Earth and Atmospheric Sciences, Edmonton, AB, Canada, (5)Northwest Territories Geological Survey, Yellowknife, NT, Canada, (6)Université du Québec à Montréal, Département des sciences biologiques, Montreal, QC, Canada

Remi Orion Masse^1,2, Alexander B Michaud², David Emerson² and Nicholas Record², (1)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (2)Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States

Benjamin N Sulman¹, Fengming Yuan¹, Teri O'Meara^1,2, Elizabeth Herndon³, David E Graham⁴, Baohua Gu³ and Peter E Thornton¹, (1)Oak Ridge National Laboratory, Climate Change Science Institute and Environmental Sciences Division, Oak Ridge, TN, United States, (2)Smithsonian Environmental Research Center Edgewater, Edgewater, MD, United States, (3)Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, TN, United States, (4)Oak Ridge National Lab, Biosciences Division, Oak Ridge, TN, United States

Sophie Opfergelt, Catherine Hirst, Arthur Monhonval, Elisabeth Mauclet and Maxime Thomas, Université Catholique de Louvain, Earth and Life Institute, Environmental Sciences (ELIe), Louvain-La-Neuve, Belgium