{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Wild B"],"funding":["European Research Council"],"pagination":["5057"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9420143"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["13(1)"],"pubmed_abstract":["Subsea permafrost represents a large carbon pool that might be or become a significant greenhouse gas source. Scarcity of observational data causes large uncertainties. We here use five 21-56 m long subsea permafrost cores from the Laptev Sea to constrain organic carbon (OC) storage and sources, degradation state and potential greenhouse gas production upon thaw. Grain sizes, optically-stimulated luminescence and biomarkers suggest deposition of aeolian silt and fluvial sand over 160 000 years, with dominant fluvial/alluvial deposition of forest- and tundra-derived organic matter. We estimate an annual thaw rate of 1.3 ± 0.6 kg OC m<sup>-2</sup> in subsea permafrost in the area, nine-fold exceeding organic carbon thaw rates for terrestrial permafrost. During 20-month incubations, CH<sub>4<"],"journal":["Nature communications"],"pubmed_title":["Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea."],"pmcid":["PMC9420143"],"funding_grant_id":["695331"],"pubmed_authors":["Wild B","Dudarev O","Jakobsson M","Tesi T","Nybom I","Mazurov A","Shakhova N","Alexanderson H","Kosmach D","Matsubara F","Semiletov I","Ruban A","Grimm H","Gustafsson O","Tumskoy V"],"additional_accession":[]},"is_claimable":false,"name":"Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea.","description":"Subsea permafrost represents a large carbon pool that might be or become a significant greenhouse gas source. Scarcity of observational data causes large uncertainties. We here use five 21-56 m long subsea permafrost cores from the Laptev Sea to constrain organic carbon (OC) storage and sources, degradation state and potential greenhouse gas production upon thaw. Grain sizes, optically-stimulated luminescence and biomarkers suggest deposition of aeolian silt and fluvial sand over 160 000 years, with dominant fluvial/alluvial deposition of forest- and tundra-derived organic matter. We estimate an annual thaw rate of 1.3 ± 0.6 kg OC m<sup>-2</sup> in subsea permafrost in the area, nine-fold exceeding organic carbon thaw rates for terrestrial permafrost. During 20-month incubations, CH<sub>4<","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Aug","modification":"2025-04-04T13:46:47.147Z","creation":"2025-04-04T13:46:47.147Z"},"accession":"S-EPMC9420143","cross_references":{"pubmed":["36030269"],"doi":["10.1038/s41467-022-32696-0"]}}