Tundra shrub expansion may amplify permafrost thaw by advancing snowmelt timing
نویسندگان
چکیده
منابع مشابه
Long-term CO2 production following permafrost thaw
Thawing permafrost represents a poorly understood feedback mechanism of climate change in the Arctic, but with a potential impact owing to stored carbon being mobilized1–5. We have quantified the long-term loss of carbon (C) from thawing permafrost in Northeast Greenland from 1996 to 2008 by combining repeated sediment sampling to assess changes in C stock and >12 years of CO2 production in inc...
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In arctic tundra, where wind transport of snow is common, shrubs can significantly modify the distribution and physical characteristics of the snow cover. We examined interactions between shrubs and snow by measuring snow depths along three 1-km transects in arctic Alaska and then measuring plant canopy characteristics at the same locations during the following growing season. Snow depths corre...
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Permafrost in the Arctic is thawing, exposing large carbon and nitrogen stocks for decomposition. Gaseous carbon release from Arctic soils due to permafrost thawing is known to be substantial, but growing evidence suggests that Arctic soils may also be relevant sources of nitrous oxide (N2O). Here we show that N2O emissions from subarctic peatlands increase as the permafrost thaws. In our study...
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Phototrophic pigment diversity and picophytoplankton in permafrost thaw lakes 1 2 A. Przytulska, J. Comte, S. Crevecoeur, C. Lovejoy, I. Laurion and W. F. Vincent 3 4 Centre d’études nordiques (CEN) and Département de biologie, Université Laval, Québec City, 5 QC G1V 0A6, CANADA 6 Takuvik Joint International Laboratory, Centre National de la Recherche Scientifique (France, 7 CNRS UMI 3376) and ...
متن کاملThe role of watershed characteristics, permafrost thaw, and wildfire
Introduction Conclusions References
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ژورنال
عنوان ژورنال: Arctic Science
سال: 2019
ISSN: 2368-7460
DOI: 10.1139/as-2018-0028