A. D. McGuire,^1,2 C. Wirth,³ M. Apps,⁴ J. Beringer,⁵ J. Clein,⁶ H. Epstein,⁷ D. W. Kicklighter,⁸ J. Bhatti,⁴ F. S. Chapin III,⁶ B. de Groot,⁴ D. Efremov,⁹ W. Eugster,¹⁰ M. Fukuda,¹¹ T. Gower,¹² L. Hinzman,¹³ B. Huntley,¹⁴ G. J. Jia,⁷ E. Kasischke,¹⁵ J. Melillo,⁸ V. Romanovsky,¹⁶ A. Shvidenko,¹⁷ E. Vaganov,¹⁸ D. Walker<sup>6

1</sup>U.S. Geological Survey, Alaska Cooperative Fish and Wildlife Research Unit, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
²ffadm@uaf.edu
³Max-Plank Institut für Biogeochemie, Postfach 100164, D-07701 Jena, Germany
⁴Canadian Forest Service, Northern Forestry Center, Edmonton, Alb., T6H 3S5, Canada
⁵School of Geography and Environmental Science, Monash University, Clayton, Vic 3800, Australia
⁶Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK, 99775, USA
⁷Dept. of Environmental Sciences, University of Virginia, Charlottesville, VA 22904, USA
⁸The Ecosystems Center, Marine Biological Laboratory, 7 MBL Street, Woods Hole, MA 02543, USA
⁹Far Eastern Forestry Research Institute Khaborovsk, 680030, Russia
¹⁰University of Bern, Geographical Institute, Hallerstrasse 12, 3012 Bern, Switzerland
¹¹Institute of Low Temperature, Hokkaido University, N 19 W8 Sapporo, 060 Japan
¹²Dept. of Forest Ecology and Management, University of Wisconsin, Madison, WI 53706, USA
¹³Institute of Northern Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
¹⁴Environmental Research Centre, University of Durham, Durham DH1 3LE, United Kingdom
¹⁵Dept. of Geography, University of Maryland, College Park, MD 20742, USA
¹⁶Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
¹⁷International Institute for Applied Systems Analysis, A-2361 Laxenburg, Austria
¹⁸Institute of Forestry, Russian Academy of Sciences, Krasnoyarsk, 660036, Russia