Permafrost - Physical Aspects, Carbon Cycling, Databases and Uncertainties
Permafrost - physical aspects, carbon cycling, databases and uncertainties Julia Boike1, Moritz Langer1, Hugues Lantuit1, Sina Muster1, Kurt Roth2, Torsten Sachs3, Paul Overduin1, Sebastian Westermann4, A. David McGuire5 1 Alfred Wegener Institute Potsdam, Telegrafenberg A6, 14473 Potsdam, Germany, Julia.Boike@awi.de 2 Institute of Environmental Physics, INF 229, University of Heidelberg, 69120 Heidelberg, Germany, kurt.roth@iup.uni-heidelberg.de 3 Deutsches GeoForschungsZentrum GFZ, Telegrafenberg, B 320, 14473 Potsdam, Germany, Torsten.Sachs@gfz-potsdam.de 4 Department of Geosciences, University of Oslo, P.O. Box 1047, Blindern, 0316 Oslo, Norway, sebastian.westermann@geo.uio.no 5 U.S. Geological Survey, Institute of Arctic Biology, Department of Biology and Wildlife University of Alaska Fairbanks, Fairbanks, AK 99775, USA, admcguire@alaska.edu Permafrost - physical aspects, carbon cycling, databases and uncertainties ..................................................................................... 1 1 Permafrost: a phenomenon of global significance .............. 2 2 Permafrost: definition, distribution and history .................. 4 3 Physical factors affecting the permafrost thermal regime ... 5 3.1 Permafrost temperatures ................................................. 5 3.2 Active layer dynamics .................................................... 6 3.3 Land cover ...................................................................... 8 3.4 Surface energy balance ................................................. 10 4 Carbon
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