Journal Article 104 permafrost 60 Soil 49 7440-44-0 33 Carbon 33 climate change 24 Research Support, Non-U.S. Gov't 23 mehr ... permafrost thaw 22 142M471B3J 20 Carbon Dioxide 20 Methane 20 OP0UW79H66 20 Arctic 15 Research Support, U.S. Gov't, Non-P.H.S. 13 thermokarst 13 N762921K75 12 Nitrogen 12 059QF0KO0R 10 Water 10 climate warming 10 methane 10 Greenhouse Gases 9 tundra 9 carbon 8 boreal 7 ecosystem respiration 7 peatland 7 carbon cycle 6 carbon dioxide 6 wetlands 6 weniger ...