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Massive remobilization of permafrost carbon during post-glacial warming
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry. Institute of Marine Sciences, National Research Council (ISMAR-CNR), Italy.
Stockholm University, Faculty of Science, Department of Geological Sciences. Columbia University, USA; Uni Research Climate, Norway.
Stockholm University, Faculty of Science, Department of Geological Sciences.
Stockholm University, Faculty of Science, Department of Geological Sciences. University Centre in Svalbard (UNIS), Svalbard.
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2016 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 7, 13653Article in journal (Refereed) Published
Abstract [en]

Recent hypotheses, based on atmospheric records and models, suggest that permafrost carbon (PF-C) accumulated during the last glaciation may have been an important source for the atmospheric CO2 rise during post-glacial warming. However, direct physical indications for such PF-C release have so far been absent. Here we use the Laptev Sea (Arctic Ocean) as an archive to investigate PF-C destabilization during the last glacial–interglacial period. Our results show evidence for massive supply of PF-C from Siberian soils as a result of severe active layer deepening in response to the warming. Thawing of PF-C must also have brought about an enhanced organic matter respiration and, thus, these findings suggest that PF-C may indeed have been an important source of CO2 across the extensive permafrost domain. The results challenge current paradigms on the post-glacial CO2 rise and, at the same time, serve as a harbinger for possible consequences of the present-day warming of PF-C soils.

Place, publisher, year, edition, pages
2016. Vol. 7, 13653
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Climate Research
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URN: urn:nbn:se:su:diva-137464DOI: 10.1038/ncomms13653ISI: 000388661300001OAI: oai:DiVA.org:su-137464DiVA: diva2:1062733
Available from: 2017-01-08 Created: 2017-01-08 Last updated: 2017-01-11Bibliographically approved

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Muschitiello, FrancescoSmittenberg, Rienk H.Jakobsson, MartinAndersson, AugustKirchner, NinaGustafsson, Örjan
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Department of Environmental Science and Analytical ChemistryDepartment of Geological SciencesDepartment of Physical Geography
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