A Third of Organic Carbon Is Mineral Bound in Permafrost Sediments Exposed by the World's Largest Thaw Slump, Batagay, Siberia
ABSTRACT Organic carbon (OC) in permafrost interacts with the mineral fraction of soil and sediments, representing < 1% to ~80% of the total OC pool. Quantifying the nature and controls of mineral–OC interactions is therefore crucial for realistic assessments of permafrost‐carbon‐climate feedback...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | http://dx.doi.org/10.1002/ppp.2230 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2230 |
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crwiley:10.1002/ppp.2230 2024-09-15T18:11:35+00:00 A Third of Organic Carbon Is Mineral Bound in Permafrost Sediments Exposed by the World's Largest Thaw Slump, Batagay, Siberia Thomas, Maxime Jongejans, Loeka L. Strauss, Jens Vermylen, Chloé Calcus, Sacha Opel, Thomas Kizyakov, Alexander Wetterich, Sebastian Grosse, Guido Opfergelt, Sophie Fonds De La Recherche Scientifique - FNRS H2020 European Research Council Leverhulme Trust Deutsche Bundesstiftung Umwelt 2024 http://dx.doi.org/10.1002/ppp.2230 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2230 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 35, issue 3, page 278-293 ISSN 1045-6740 1099-1530 journal-article 2024 crwiley https://doi.org/10.1002/ppp.2230 2024-07-25T04:21:26Z ABSTRACT Organic carbon (OC) in permafrost interacts with the mineral fraction of soil and sediments, representing < 1% to ~80% of the total OC pool. Quantifying the nature and controls of mineral–OC interactions is therefore crucial for realistic assessments of permafrost‐carbon‐climate feedbacks, especially in ice‐rich regions facing rapid thaw and the development of thermo‐erosion landforms. Here, we analyzed sediment samples from the Batagay megaslump in East Siberia, and we present total element concentrations, mineralogy, and mineral–OC interactions in its different stratigraphic units. Our findings indicate that up to 34 ± 8% of the OC pool interacts with mineral surfaces or elements. Interglacial deposits exhibit enhanced OC–mineral interactions, where OC has undergone greater microbial transformation and has likely low degradability. We provide a first‐order estimate of ~12,000 tons of OC mobilized annually downslope of the headwall (i.e., the approximate mass of 30 large aircrafts), with a maximum of 38% interacting with OC via complexation with metals or associations to poorly crystalline iron oxides. These data imply that over one‐third of the OC exposed by the slump is not readily available for mineralization, potentially leading to prolonged OC residence time in soil and sediments under stable physicochemical conditions. Article in Journal/Newspaper Ice permafrost Permafrost and Periglacial Processes Siberia Wiley Online Library Permafrost and Periglacial Processes 35 3 278 293 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT Organic carbon (OC) in permafrost interacts with the mineral fraction of soil and sediments, representing < 1% to ~80% of the total OC pool. Quantifying the nature and controls of mineral–OC interactions is therefore crucial for realistic assessments of permafrost‐carbon‐climate feedbacks, especially in ice‐rich regions facing rapid thaw and the development of thermo‐erosion landforms. Here, we analyzed sediment samples from the Batagay megaslump in East Siberia, and we present total element concentrations, mineralogy, and mineral–OC interactions in its different stratigraphic units. Our findings indicate that up to 34 ± 8% of the OC pool interacts with mineral surfaces or elements. Interglacial deposits exhibit enhanced OC–mineral interactions, where OC has undergone greater microbial transformation and has likely low degradability. We provide a first‐order estimate of ~12,000 tons of OC mobilized annually downslope of the headwall (i.e., the approximate mass of 30 large aircrafts), with a maximum of 38% interacting with OC via complexation with metals or associations to poorly crystalline iron oxides. These data imply that over one‐third of the OC exposed by the slump is not readily available for mineralization, potentially leading to prolonged OC residence time in soil and sediments under stable physicochemical conditions. |
author2 |
Fonds De La Recherche Scientifique - FNRS H2020 European Research Council Leverhulme Trust Deutsche Bundesstiftung Umwelt |
format |
Article in Journal/Newspaper |
author |
Thomas, Maxime Jongejans, Loeka L. Strauss, Jens Vermylen, Chloé Calcus, Sacha Opel, Thomas Kizyakov, Alexander Wetterich, Sebastian Grosse, Guido Opfergelt, Sophie |
spellingShingle |
Thomas, Maxime Jongejans, Loeka L. Strauss, Jens Vermylen, Chloé Calcus, Sacha Opel, Thomas Kizyakov, Alexander Wetterich, Sebastian Grosse, Guido Opfergelt, Sophie A Third of Organic Carbon Is Mineral Bound in Permafrost Sediments Exposed by the World's Largest Thaw Slump, Batagay, Siberia |
author_facet |
Thomas, Maxime Jongejans, Loeka L. Strauss, Jens Vermylen, Chloé Calcus, Sacha Opel, Thomas Kizyakov, Alexander Wetterich, Sebastian Grosse, Guido Opfergelt, Sophie |
author_sort |
Thomas, Maxime |
title |
A Third of Organic Carbon Is Mineral Bound in Permafrost Sediments Exposed by the World's Largest Thaw Slump, Batagay, Siberia |
title_short |
A Third of Organic Carbon Is Mineral Bound in Permafrost Sediments Exposed by the World's Largest Thaw Slump, Batagay, Siberia |
title_full |
A Third of Organic Carbon Is Mineral Bound in Permafrost Sediments Exposed by the World's Largest Thaw Slump, Batagay, Siberia |
title_fullStr |
A Third of Organic Carbon Is Mineral Bound in Permafrost Sediments Exposed by the World's Largest Thaw Slump, Batagay, Siberia |
title_full_unstemmed |
A Third of Organic Carbon Is Mineral Bound in Permafrost Sediments Exposed by the World's Largest Thaw Slump, Batagay, Siberia |
title_sort |
third of organic carbon is mineral bound in permafrost sediments exposed by the world's largest thaw slump, batagay, siberia |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/ppp.2230 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2230 |
genre |
Ice permafrost Permafrost and Periglacial Processes Siberia |
genre_facet |
Ice permafrost Permafrost and Periglacial Processes Siberia |
op_source |
Permafrost and Periglacial Processes volume 35, issue 3, page 278-293 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.2230 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
35 |
container_issue |
3 |
container_start_page |
278 |
op_container_end_page |
293 |
_version_ |
1810449170484428800 |