Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods
The Batagay megaslump, a permafrost thaw feature in north-eastern Siberia, provides access to ancient permafrost up to ∼650 kyr old. We aimed to assess the permafrost-locked organic matter (OM) quality and to deduce palaeo-environmental information on glacial–interglacial timescales. We sampled five...
Published in: | The Cryosphere |
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Online Access: | https://epic.awi.de/id/eprint/57163/ https://epic.awi.de/id/eprint/57163/1/Jongejans_tc-16-3601-2022.pdf https://doi.org/10.5194/tc-16-3601-2022 https://hdl.handle.net/10013/epic.c83930b8-ab51-446b-a619-6662f26ec043 |
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ftawi:oai:epic.awi.de:57163 2024-03-24T09:02:30+00:00 Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods Jongejans, Loeka L Mangelsdorf, Kai Karger, Cornelia Opel, Thomas Wetterich, Sebastian Courtin, Jeremy Meyer, Hanno Kizyakov, Alexander I Grosse, Guido Shepelev, Andrei G Syromyatnikov, Igor I Fedorov, Alexander N Strauss, Jens 2022 application/pdf https://epic.awi.de/id/eprint/57163/ https://epic.awi.de/id/eprint/57163/1/Jongejans_tc-16-3601-2022.pdf https://doi.org/10.5194/tc-16-3601-2022 https://hdl.handle.net/10013/epic.c83930b8-ab51-446b-a619-6662f26ec043 unknown https://epic.awi.de/id/eprint/57163/1/Jongejans_tc-16-3601-2022.pdf Jongejans, L. L. orcid:0000-0002-0383-4567 , Mangelsdorf, K. , Karger, C. , Opel, T. orcid:0000-0003-1315-8256 , Wetterich, S. orcid:0000-0001-9234-1192 , Courtin, J. , Meyer, H. orcid:0000-0003-4129-4706 , Kizyakov, A. I. , Grosse, G. orcid:0000-0001-5895-2141 , Shepelev, A. G. , Syromyatnikov, I. I. , Fedorov, A. N. and Strauss, J. orcid:0000-0003-4678-4982 (2022) Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods , The Cryosphere, 16 (9), pp. 3601-3617 . doi:10.5194/tc-16-3601-2022 <https://doi.org/10.5194/tc-16-3601-2022> , hdl:10013/epic.c83930b8-ab51-446b-a619-6662f26ec043 EPIC3The Cryosphere, 16(9), pp. 3601-3617, ISSN: 1994-0424 Article isiRev 2022 ftawi https://doi.org/10.5194/tc-16-3601-2022 2024-02-27T09:55:26Z The Batagay megaslump, a permafrost thaw feature in north-eastern Siberia, provides access to ancient permafrost up to ∼650 kyr old. We aimed to assess the permafrost-locked organic matter (OM) quality and to deduce palaeo-environmental information on glacial–interglacial timescales. We sampled five stratigraphic units exposed on the 55 m high slump headwall and analysed lipid biomarkers (alkanes, fatty acids and alcohols). Our findings revealed similar biogeochemical signatures for the glacial periods: the lower ice complex (Marine Isotope Stage (MIS) 16 or earlier), the lower sand unit (sometime between MIS 16–6) and the upper ice complex (MIS 4–2). The OM in these units has a terrestrial character, and microbial activity was likely limited. Contrarily, the n-alkane and fatty acid distributions differed for the units from interglacial periods: the woody layer (MIS 5), separating the lower sand unit and the upper ice complex, and the Holocene cover (MIS 1), on top of the upper ice complex. The woody layer, marking a permafrost degradation disconformity, contained markers of terrestrial origin (sterols) and high microbial decomposition (iso- and anteiso-fatty acids). In the Holocene cover, biomarkers pointed to wet depositional conditions and we identified branched and cyclic alkanes, which are likely of microbial origin. Higher OM decomposition characterised the interglacial periods. As climate warming will continue permafrost degradation in the Batagay megaslump and in other areas, large amounts of deeply buried ancient OM with variable composition and degradability are mobilised, likely significantly enhancing greenhouse gas emissions from permafrost regions. Article in Journal/Newspaper Ice permafrost The Cryosphere Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) The Cryosphere 16 9 3601 3617 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The Batagay megaslump, a permafrost thaw feature in north-eastern Siberia, provides access to ancient permafrost up to ∼650 kyr old. We aimed to assess the permafrost-locked organic matter (OM) quality and to deduce palaeo-environmental information on glacial–interglacial timescales. We sampled five stratigraphic units exposed on the 55 m high slump headwall and analysed lipid biomarkers (alkanes, fatty acids and alcohols). Our findings revealed similar biogeochemical signatures for the glacial periods: the lower ice complex (Marine Isotope Stage (MIS) 16 or earlier), the lower sand unit (sometime between MIS 16–6) and the upper ice complex (MIS 4–2). The OM in these units has a terrestrial character, and microbial activity was likely limited. Contrarily, the n-alkane and fatty acid distributions differed for the units from interglacial periods: the woody layer (MIS 5), separating the lower sand unit and the upper ice complex, and the Holocene cover (MIS 1), on top of the upper ice complex. The woody layer, marking a permafrost degradation disconformity, contained markers of terrestrial origin (sterols) and high microbial decomposition (iso- and anteiso-fatty acids). In the Holocene cover, biomarkers pointed to wet depositional conditions and we identified branched and cyclic alkanes, which are likely of microbial origin. Higher OM decomposition characterised the interglacial periods. As climate warming will continue permafrost degradation in the Batagay megaslump and in other areas, large amounts of deeply buried ancient OM with variable composition and degradability are mobilised, likely significantly enhancing greenhouse gas emissions from permafrost regions. |
format |
Article in Journal/Newspaper |
author |
Jongejans, Loeka L Mangelsdorf, Kai Karger, Cornelia Opel, Thomas Wetterich, Sebastian Courtin, Jeremy Meyer, Hanno Kizyakov, Alexander I Grosse, Guido Shepelev, Andrei G Syromyatnikov, Igor I Fedorov, Alexander N Strauss, Jens |
spellingShingle |
Jongejans, Loeka L Mangelsdorf, Kai Karger, Cornelia Opel, Thomas Wetterich, Sebastian Courtin, Jeremy Meyer, Hanno Kizyakov, Alexander I Grosse, Guido Shepelev, Andrei G Syromyatnikov, Igor I Fedorov, Alexander N Strauss, Jens Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods |
author_facet |
Jongejans, Loeka L Mangelsdorf, Kai Karger, Cornelia Opel, Thomas Wetterich, Sebastian Courtin, Jeremy Meyer, Hanno Kizyakov, Alexander I Grosse, Guido Shepelev, Andrei G Syromyatnikov, Igor I Fedorov, Alexander N Strauss, Jens |
author_sort |
Jongejans, Loeka L |
title |
Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods |
title_short |
Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods |
title_full |
Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods |
title_fullStr |
Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods |
title_full_unstemmed |
Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods |
title_sort |
molecular biomarkers in batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/57163/ https://epic.awi.de/id/eprint/57163/1/Jongejans_tc-16-3601-2022.pdf https://doi.org/10.5194/tc-16-3601-2022 https://hdl.handle.net/10013/epic.c83930b8-ab51-446b-a619-6662f26ec043 |
genre |
Ice permafrost The Cryosphere Siberia |
genre_facet |
Ice permafrost The Cryosphere Siberia |
op_source |
EPIC3The Cryosphere, 16(9), pp. 3601-3617, ISSN: 1994-0424 |
op_relation |
https://epic.awi.de/id/eprint/57163/1/Jongejans_tc-16-3601-2022.pdf Jongejans, L. L. orcid:0000-0002-0383-4567 , Mangelsdorf, K. , Karger, C. , Opel, T. orcid:0000-0003-1315-8256 , Wetterich, S. orcid:0000-0001-9234-1192 , Courtin, J. , Meyer, H. orcid:0000-0003-4129-4706 , Kizyakov, A. I. , Grosse, G. orcid:0000-0001-5895-2141 , Shepelev, A. G. , Syromyatnikov, I. I. , Fedorov, A. N. and Strauss, J. orcid:0000-0003-4678-4982 (2022) Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods , The Cryosphere, 16 (9), pp. 3601-3617 . doi:10.5194/tc-16-3601-2022 <https://doi.org/10.5194/tc-16-3601-2022> , hdl:10013/epic.c83930b8-ab51-446b-a619-6662f26ec043 |
op_doi |
https://doi.org/10.5194/tc-16-3601-2022 |
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The Cryosphere |
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16 |
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9 |
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3601 |
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