Tiia Määttä¹, Sheel Bansal², Gil Bohrer³, Kyle B Delwiche⁴, Ankur R Desai⁵, Sarah Feron⁶, Manuel Helbig⁷, Järvi Järveoja⁸, Aino Korrensalo⁹, Ken Krauss¹⁰, Mats B Nilsson¹¹, Shuli Niu¹², Zutao Ouyang¹³, Matthias Peichl¹⁴, Kathleen E Savage¹⁵, Oliver Sonnentag¹⁶, Angela Che Ing Tang¹⁷, Eeva-Stiina Tuittila¹⁸, Masahito Ueyama¹⁹, Jinsong Wang¹², Eric J Ward²⁰, Zhen Zhang²¹, Robert B Jackson²², Avni Malhotra²³ and EC-chamber CH4 project collaborators, (1)University of Zurich, Department of Geography, Zurich, Switzerland, (2)U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, United States, (3)The Ohio State University, Department of Civil, Environmental and Geodetic Engineering, Columbus, United States, (4)University of California Berkeley, Berkeley, CA, United States, (5)University of Wisconsin Madison, Atmospheric and Oceanic Sciences, Madison, United States, (6)University of Groningen, Climate Change and Energy Transition, Campus Fryslân, Groningen, Netherlands, (7)Dalhousie University, Department of Physics & Atmospheric Science, Halifax, Canada, (8)SLU Swedish University of Agricultural Sciences Uppsala, Department of Forest Ecology and Management, Uppsala, Sweden, (9)University of Eastern Finland, Department of Environmental and Biological Sciences, Joensuu, Finland, (10)Louisiana Universities Marine Consortium (LUMCON), 8124 Highway 56, Chauvin, LA 70344 USA, LUMCON, Chauvin, United States, (11)Swedish University of Agricultural Sciences, Department of Forest Ecology and Management, Umea, Sweden, (12)Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China, (13)Auburn University at Montgomery, Earth Modeling and Observation Lab (EMO), College of Forestry, Wildlife and Environment, Montgomery, United States, (14)SLU Swedish University of Agricultural Sciences Umeå, Department of Forest Ecology and Management, Umeå, Sweden, (15)Woodwell Climate Research Center, Falmouth, United States, (16)University of Montreal, Département de Géographie, Montreal, QC, Canada, (17)University of Toledo, Department of Environmental Sciences, Toledo, OH, United States, (18)University of Eastern Finland, School of Forest Sciences, Joensuu, Finland, (19)Osaka Prefecture University, Sakai, Japan, (20)NASA GSFC / UMD ESSIC, Biospheric Sciences, College Park, United States, (21)ITP Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China, (22)Stanford University, Earth System Science, Stanford, United States, (23)Pacific Northwest National Laboratory, Richland, WA, United States