Importance of soil thermal regime in terrestrial ecosystem carbon dynamics in the circumpolar north

a Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN, USA b Department of Agronomy, Purdue University, West Lafayette, IN, USA c Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK d Arctic Network, National Park Service, Fairbanks, AK, USA e The Ecosystems Center, Marine Biological Laboratory at Woods Hole, MA, USA f Dept. of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA