title: Massive remobilization of permafrost carbon during post-glacial warming.
abstract: 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 CO2rise 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 CO2across the extensive permafrost domain. The results challenge current paradigms on the post-glacial CO2rise and, at the same time, serve as a harbinger for possible consequences of the present-day warming of PF-C soils.
authors.affiliation: Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University, Svante Arrhenius väg 8, SE-11418 Stockholm, Sweden.|Bolin Centre for Climate Research, Stockholm University, SE-106 91 Stockholm, Sweden.|Institute of Marine Sciences, National Research Council (ISMAR-CNR), Via Piero Gobetti 101, 40129 Bologna, Italy.
authors.forename: T
authors.identifier: http://orcid.org/0000-0002-1686-3375
authors.initials: T
authors.lastname: Tesi
authors.affiliation: Bolin Centre for Climate Research, Stockholm University, SE-106 91 Stockholm, Sweden.|Lamont-Doehrty Earth Observatory, Columbia University, 61 Route 9W-PO Box 1000, Palisades, New York 10964-8000, USA.|Uni Research Climate, Nygårdsgaten 112, 5008 Bergen, Norway.|Department of Geological Sciences (IGV), Stockholm University, Svante Arrhenius väg 8, SE-106 91 Stockholm, Sweden.
authors.forename: F
authors.initials: F
authors.lastname: Muschitiello
authors.affiliation: Bolin Centre for Climate Research, Stockholm University, SE-106 91 Stockholm, Sweden.|Department of Geological Sciences (IGV), Stockholm University, Svante Arrhenius väg 8, SE-106 91 Stockholm, Sweden.
authors.forename: R H
authors.initials: RH
authors.lastname: Smittenberg
authors.affiliation: Bolin Centre for Climate Research, Stockholm University, SE-106 91 Stockholm, Sweden.|Department of Geological Sciences (IGV), Stockholm University, Svante Arrhenius väg 8, SE-106 91 Stockholm, Sweden.|University Centre in Svalbard (UNIS), P O Box 156, N-9171 Longyearbyen, Svalbard.
authors.forename: M
authors.initials: M
authors.lastname: Jakobsson
authors.affiliation: Faculty of Earth and Life Sciences, Department of Earth Sciences, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands.
authors.forename: J E
authors.initials: JE
authors.lastname: Vonk
authors.affiliation: University Centre in Svalbard (UNIS), P O Box 156, N-9171 Longyearbyen, Svalbard.
authors.forename: P
authors.initials: P
authors.lastname: Hill
authors.affiliation: Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University, Svante Arrhenius väg 8, SE-11418 Stockholm, Sweden.|Bolin Centre for Climate Research, Stockholm University, SE-106 91 Stockholm, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Andersson
authors.affiliation: Bolin Centre for Climate Research, Stockholm University, SE-106 91 Stockholm, Sweden.|Department of Physical Geography (NG), Stockholm University, SE-106 91 Stockholm, Sweden.
authors.forename: N
authors.initials: N
authors.lastname: Kirchner
authors.affiliation: University Centre in Svalbard (UNIS), P O Box 156, N-9171 Longyearbyen, Svalbard.
authors.forename: R
authors.initials: R
authors.lastname: Noormets
authors.affiliation: Pacific Oceanological Institute FEB RAS, Baltic Street, 690041 Vladivostok, Russia.|Tomsk Polytechnic University, Lenina Prospect, 634050 Tomsk, Russia.
authors.forename: O
authors.initials: O
authors.lastname: Dudarev
authors.affiliation: Pacific Oceanological Institute FEB RAS, Baltic Street, 690041 Vladivostok, Russia.|Tomsk Polytechnic University, Lenina Prospect, 634050 Tomsk, Russia.|University of Alaska Fairbanks, Koyukuk Drive, Fairbanks, Alaska 99775-7340, USA.
authors.forename: I
authors.initials: I
authors.lastname: Semiletov
authors.affiliation: Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University, Svante Arrhenius väg 8, SE-11418 Stockholm, Sweden.|Bolin Centre for Climate Research, Stockholm University, SE-106 91 Stockholm, Sweden.
authors.forename: Ö
authors.initials: Ö
authors.lastname: Gustafsson