Journal
NATURE COMMUNICATIONS
Volume 7, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms13653
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Funding
- Knut and Alice Wallenberg Foundation (KAW contract) [2011.0027]
- Swedish Research Council (VR) [621-2004-4039, 621-2007-4631]
- Nordic Council of Ministers Cryosphere-Climate-Carbon Initiative (project Defrost) [23001]
- EU [PIEF-GA-2011-300259]
- Russian Government [14, Z50.31.0012/03.19.2014]
- Russian Foundation for Basic Research [13-05-12028, 13-05-12041]
- Russian Scientific Foundation [15-17-20032]
- European Research Council (ERC-AdG project CC-TOP) [695331]
- Russian Science Foundation [15-17-20032] Funding Source: Russian Science Foundation
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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.
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