Negative feedback processes following drainage slow down permafrost degradation
نویسندگان
چکیده
منابع مشابه
Permafrost and Periglacial Processes
The microbial process of methane (CH4) production during the back-freezing of permafrost soils in autumn and the future fate of produced CH4 in the thawing phase of the following spring are not well understood. Long-term CH4 flux studies in the Lena Delta (Siberia) indicate that back-stored CH4 adds to the emission of newly-produced CH4 at the beginning of the vegetation period. Further field a...
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Sphagnum (spp.) is widely distributed in permafrost regions around the arctic and subarctic. The moisture content of the moss layer affects the thermal insulative capacity and preservation of permafrost. It also controls the growth and collapse history of palsas and other peat mounds, and is relevant, in general terms, to permafrost thaw (therrnokarst). In this study, we test and calibrate seve...
متن کاملPermafrost and Periglacial Processes
1 Geological Survey of Canada, Natural Resources Canada, Ottawa, Ontario, Canada 2 Geophysical Institute, University of Alaska, Fairbanks, Alaska, USA 3 Department of Geography, University of Ottawa, Ottawa, Ontario, Canada 4 Department of Geography and Environmental Studies, Carleton University, Ottawa, Ontario, Canada 5 Centre d’études nordiques, Université Laval, Québec (QC), Canada 6 United...
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Climate change and permafrost thaw have been suggested to increase high latitude methane emissions that could potentially represent a strong feedback to the climate system. Using an integrated earth-system model framework, we examine the degradation of near-surface permafrost, temporal dynamics of inundation (lakes and wetlands) induced by hydro-climatic change, subsequent methane emission, and...
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ژورنال
عنوان ژورنال: Global Change Biology
سال: 2019
ISSN: 1354-1013,1365-2486
DOI: 10.1111/gcb.14744