Jessica Gilman Ernakovich¹, Rebecca E Hewitt², Benjamin W Abbott³, Robyn Barbato⁴, Jiri Barta⁵, Christina Biasi⁶, Chris Chabot⁷, Megan Dillon⁸, Stacey Jarvis Doherty^4,9, Jenni Hultman¹⁰, Christian Knoblauch¹¹, Chui Yim Maggie Lau¹², Mary-Cathrine Leewis¹³, Susanne Liebner¹⁴, Rachel Mackelprang¹⁵, Matt Sullivan¹⁶, Tullis C Onstott¹², Virginia Isabel Rich¹⁷, Andreas Richter¹⁸, Christina Schaedel¹⁹, Ursel Schuette¹³, Henri Siljanen²⁰, Neslihan Tas⁸, Ina Timling²¹, Tatiana A Vishnivetskaya²², Mark P Waldrop²³, Emily Whalen²⁴ and Matthias Winkel²⁵, (1)University of New Hampshire Main Campus, Natural Resources and the Environment, Durham, NH, United States, (2)Northern Arizona University, Center for Ecosystem Science and Society, Flagstaff, AZ, United States, (3)Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States, (4)U.S. Army Cold Regions Research and Engineering Laboratory, Hanover, NH, United States, (5)University of South Bohemia, Ceske Budejovice, Austria, (6)University of Eastern Finland, Kuopio, Finland, (7)California State University Northridge, Northridge, United States, (8)Lawrence Berkeley National Laboratory, Berkeley, CA, United States, (9)University of New Hampshire Main Campus, Molecular, Cellular, and Biomedical Sciences, Durham, NH, United States, (10)University of Helsinki, Helsinki, Finland, (11)University of Hamburg, Hamburg, Germany, (12)Princeton University, Department of Geosciences, Princeton, NJ, United States, (13)University of Alaska Fairbanks, Fairbanks, AK, United States, (14)GFZ German Research Centre for Geosciences, Section Geomicrobiology, Potsdam, Germany, (15)California State University Northridge, Northridge, CA, United States, (16)Department of Natural Resources Ohio, Microbiology, Columbus, OH, United States, (17)Ohio State University, Columbus, OH, United States, (18)University of Vienna, Department of Microbiology and Ecosystem Science, Vienna, Austria, (19)Northern Arizona University, Flagstaff, AZ, United States, (20)University of Eastern Finland, Joensuu, Finland, (21)University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK, United States, (22)University of Tennessee, Knoxville, TN, United States, (23)US Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, Menlo Park, CA, United States, (24)University of New Hampshire Main Campus, Durham, United States, (25)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany