Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea

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, deg...

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Published in:Nature Communications
Main Authors: Wild, Birgit, Shakhova, Natalia, Dudarev, Oleg, Ruban, Alexey, Kosmach, Denis, Tumskoy, Vladimir, Tesi, Tommaso, Grimm, Hanna, Nybom, Inna, Matsubara, Felipe, Alexanderson, Helena, Jakobsson, Martin, Mazurov, Alexey, Semiletov, Igor, Gustafsson, Örjan
Format: Text
Language:English
Published: Nature Publishing Group UK 2022
Subjects:
Article
Laptev Sea
laptev
Ocean acidification
permafrost
Tundra
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9420143/
http://www.ncbi.nlm.nih.gov/pubmed/36030269
https://doi.org/10.1038/s41467-022-32696-0
id ftpubmed:oai:pubmedcentral.nih.gov:9420143
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spelling ftpubmed:oai:pubmedcentral.nih.gov:9420143 2023-05-15T17:07:13+02:00 Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea Wild, Birgit Shakhova, Natalia Dudarev, Oleg Ruban, Alexey Kosmach, Denis Tumskoy, Vladimir Tesi, Tommaso Grimm, Hanna Nybom, Inna Matsubara, Felipe Alexanderson, Helena Jakobsson, Martin Mazurov, Alexey Semiletov, Igor Gustafsson, Örjan 2022-08-27 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9420143/ http://www.ncbi.nlm.nih.gov/pubmed/36030269 https://doi.org/10.1038/s41467-022-32696-0 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9420143/ http://www.ncbi.nlm.nih.gov/pubmed/36030269 http://dx.doi.org/10.1038/s41467-022-32696-0 © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . CC-BY Nat Commun Article Text 2022 ftpubmed https://doi.org/10.1038/s41467-022-32696-0 2022-09-04T00:51:07Z 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(−2) in subsea permafrost in the area, nine-fold exceeding organic carbon thaw rates for terrestrial permafrost. During 20-month incubations, CH(4) and CO(2) production averaged 1.7 nmol and 2.4 µmol g(−1) OC d(−1), providing a baseline to assess the contribution of subsea permafrost to the high CH(4) fluxes and strong ocean acidification observed in the region. Text laptev Laptev Sea Ocean acidification permafrost Tundra PubMed Central (PMC) Laptev Sea Nature Communications 13 1
institution Open Polar
collection PubMed Central (PMC)
op_collection_id ftpubmed
language English
topic Article
spellingShingle Article
Wild, Birgit
Shakhova, Natalia
Dudarev, Oleg
Ruban, Alexey
Kosmach, Denis
Tumskoy, Vladimir
Tesi, Tommaso
Grimm, Hanna
Nybom, Inna
Matsubara, Felipe
Alexanderson, Helena
Jakobsson, Martin
Mazurov, Alexey
Semiletov, Igor
Gustafsson, Örjan
Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea
topic_facet Article
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(−2) in subsea permafrost in the area, nine-fold exceeding organic carbon thaw rates for terrestrial permafrost. During 20-month incubations, CH(4) and CO(2) production averaged 1.7 nmol and 2.4 µmol g(−1) OC d(−1), providing a baseline to assess the contribution of subsea permafrost to the high CH(4) fluxes and strong ocean acidification observed in the region.
format Text
author Wild, Birgit
Shakhova, Natalia
Dudarev, Oleg
Ruban, Alexey
Kosmach, Denis
Tumskoy, Vladimir
Tesi, Tommaso
Grimm, Hanna
Nybom, Inna
Matsubara, Felipe
Alexanderson, Helena
Jakobsson, Martin
Mazurov, Alexey
Semiletov, Igor
Gustafsson, Örjan
author_facet Wild, Birgit
Shakhova, Natalia
Dudarev, Oleg
Ruban, Alexey
Kosmach, Denis
Tumskoy, Vladimir
Tesi, Tommaso
Grimm, Hanna
Nybom, Inna
Matsubara, Felipe
Alexanderson, Helena
Jakobsson, Martin
Mazurov, Alexey
Semiletov, Igor
Gustafsson, Örjan
author_sort Wild, Birgit
title Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea
title_short Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea
title_full Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea
title_fullStr Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea
title_full_unstemmed Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea
title_sort organic matter composition and greenhouse gas production of thawing subsea permafrost in the laptev sea
publisher Nature Publishing Group UK
publishDate 2022
url http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9420143/
http://www.ncbi.nlm.nih.gov/pubmed/36030269
https://doi.org/10.1038/s41467-022-32696-0
geographic Laptev Sea
geographic_facet Laptev Sea
genre laptev
Laptev Sea
Ocean acidification
permafrost
Tundra
genre_facet laptev
Laptev Sea
Ocean acidification
permafrost
Tundra
op_source Nat Commun
op_relation http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9420143/
http://www.ncbi.nlm.nih.gov/pubmed/36030269
http://dx.doi.org/10.1038/s41467-022-32696-0
op_rights © The Author(s) 2022
https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
op_rightsnorm CC-BY
op_doi https://doi.org/10.1038/s41467-022-32696-0
container_title Nature Communications
container_volume 13
container_issue 1
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