[1] Stockholm Univ, Dept Phys Geog & Quaternary Geol, S-10691 Stockholm, Sweden
[2] Univ Wisconsin, Dept Soil Sci, Madison, WI 53706 USA
[3] Bowdoin Coll, Earth & Oceanog Sci Dept, Brunswick, ME 04011 USA
[4] Bowdoin Coll, Environm Studies Program, Brunswick, ME 04011 USA
[5] Univ Copenhagen, Dept Geosci & Nat Resource Management, CENPERM Ctr Permafrost, DK-1350 Copenhagen, Denmark
[6] Univ Ctr Svalbard, UNIS, Longyearbyen, Norway
[7] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA
[8] US Geol Survey, Menlo Pk, CA 94025 USA
[9] US Forest Serv, Newtown Sq, PA 29008 USA
[10] Alaska Ecosci, Fairbanks, AK 99709 USA
[11] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[12] Univ Alaska Fairbanks, Palmer Res Ctr, Palmer, AK 99645 USA
[13] Argonne Natl Lab, Environm Sci Div, Argonne, IL 60439 USA
[14] Arctic Network, Fairbanks, AK 99709 USA
[15] Helmholtz Ctr Polar & Marin, Alfred Wegener Inst, Periglacial Res Unit, D-14473 Potsdam, Germany
[16] Univ Florida, Dept Biol, Gainesville, FL 32611 USA
[17] Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90095 USA
[18] Lehigh Univ, Dept Earth & Environm Sci, Bethlehem, PA 18015 USA