Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region)
Organic carbon (OC) stored in Arctic permafrost represents one of Earth’s largest and most vulnerable terrestrial carbon pools. Amplified climate warming across the Arctic results in widespread permafrost thaw. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to th...
Published in: | Biogeosciences |
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COPERNICUS GESELLSCHAFT MBH
2022
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Online Access: | https://epic.awi.de/id/eprint/55959/ https://epic.awi.de/id/eprint/55959/1/Hauck_et_al_2022_bg-19-2079-2022.pdf https://hdl.handle.net/10013/epic.0d4b83da-7ef9-4ba8-b164-ba9deabb91fe |
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ftawi:oai:epic.awi.de:55959 2024-02-27T08:38:00+00:00 Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region) Haugk, Charlotte Jongejans, Loeka L Mangelsdorf, Kai Fuchs, Matthias Ogneva, Olga Palmtag, Juri Mollenhauer, Gesine Mann, Paul James Overduin, Pier Paul Sanders, Tina Tuerena, Robyn E Schirrmeister, Lutz Wetterich, Sebastian Kizyakov, Alexander I Karger, Cornelia Strauss, Jens 2022-04-14 application/pdf https://epic.awi.de/id/eprint/55959/ https://epic.awi.de/id/eprint/55959/1/Hauck_et_al_2022_bg-19-2079-2022.pdf https://hdl.handle.net/10013/epic.0d4b83da-7ef9-4ba8-b164-ba9deabb91fe unknown COPERNICUS GESELLSCHAFT MBH https://epic.awi.de/id/eprint/55959/1/Hauck_et_al_2022_bg-19-2079-2022.pdf Haugk, C. , Jongejans, L. L. orcid:0000-0002-0383-4567 , Mangelsdorf, K. , Fuchs, M. orcid:0000-0003-3529-8284 , Ogneva, O. , Palmtag, J. , Mollenhauer, G. orcid:0000-0001-5138-564X , Mann, P. J. , Overduin, P. P. orcid:0000-0001-9849-4712 , Sanders, T. , Tuerena, R. E. , Schirrmeister, L. orcid:0000-0001-9455-0596 , Wetterich, S. orcid:0000-0001-9234-1192 , Kizyakov, A. I. , Karger, C. and Strauss, J. orcid:0000-0003-4678-4982 (2022) Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region) , Biogeosciences, 19 , pp. 2079-2094 . doi:10.5194/bg-19-2079-2022 <https://doi.org/10.5194/bg-19-2079-2022> , hdl:10013/epic.0d4b83da-7ef9-4ba8-b164-ba9deabb91fe EPIC3Biogeosciences, COPERNICUS GESELLSCHAFT MBH, 19, pp. 2079-2094, ISSN: 1726-4170 Article isiRev 2022 ftawi https://doi.org/10.5194/bg-19-2079-2022 2024-01-29T00:23:10Z Organic carbon (OC) stored in Arctic permafrost represents one of Earth’s largest and most vulnerable terrestrial carbon pools. Amplified climate warming across the Arctic results in widespread permafrost thaw. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to thawing processes. Accelerating erosion of terrestrial permafrost along shorelines leads to increased transfer of organic matter (OM) to nearshore waters. However, the amount of terrestrial permafrost carbon and nitrogen as well as the OM quality in these deposits is still poorly quantified. We define the OM quality as the intrinsic potential for further transformation, decomposition and mineralisation. Here, we characterise the sources and the quality of OM supplied to the Lena River at a rapidly eroding permafrost river shoreline cliff in the eastern part of the delta (Sobo-Sise Island). Our multi-proxy approach captures bulk elemental, molecular geochemical and carbon isotopic analyses of Late Pleistocene Yedoma permafrost and Holocene cover deposits, discontinuously spanning the last ~52 kyr. We showed that the ancient permafrost exposed in the Sobo-Sise cliff has a high organic carbon content (mean of about 5 wt %). The oldest sediments stem from Marine Isotope Stage (MIS) 3 interstadial deposits (dated to 52 to 28 cal ka BP) and are overlaid by last glacial MIS 2 (dated to 28 to 15 cal ka BP) and Holocene MIS 1 (dated to 7–0 cal ka BP) deposits. The relatively high average chain length (ACL) index of n-alkanes along the cliff profile indicates a predominant contribution of vascular plants to the OM composition. The elevated ratio of iso and anteiso-branched fatty acids (FAs) relative to mid- and long-chain (C�20) n-FAs in the interstadial MIS 3 and the interglacial MIS 1 deposits suggests stronger microbial activity and consequently higher input of bacterial biomass during these climatically warmer periods. The overall high carbon preference index (CPI) and higher plant fatty acid (HPFA) values as well as high C=N ... Article in Journal/Newspaper Arctic laptev Laptev Sea lena delta lena river permafrost Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Laptev Sea Biogeosciences 19 7 2079 2094 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Organic carbon (OC) stored in Arctic permafrost represents one of Earth’s largest and most vulnerable terrestrial carbon pools. Amplified climate warming across the Arctic results in widespread permafrost thaw. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to thawing processes. Accelerating erosion of terrestrial permafrost along shorelines leads to increased transfer of organic matter (OM) to nearshore waters. However, the amount of terrestrial permafrost carbon and nitrogen as well as the OM quality in these deposits is still poorly quantified. We define the OM quality as the intrinsic potential for further transformation, decomposition and mineralisation. Here, we characterise the sources and the quality of OM supplied to the Lena River at a rapidly eroding permafrost river shoreline cliff in the eastern part of the delta (Sobo-Sise Island). Our multi-proxy approach captures bulk elemental, molecular geochemical and carbon isotopic analyses of Late Pleistocene Yedoma permafrost and Holocene cover deposits, discontinuously spanning the last ~52 kyr. We showed that the ancient permafrost exposed in the Sobo-Sise cliff has a high organic carbon content (mean of about 5 wt %). The oldest sediments stem from Marine Isotope Stage (MIS) 3 interstadial deposits (dated to 52 to 28 cal ka BP) and are overlaid by last glacial MIS 2 (dated to 28 to 15 cal ka BP) and Holocene MIS 1 (dated to 7–0 cal ka BP) deposits. The relatively high average chain length (ACL) index of n-alkanes along the cliff profile indicates a predominant contribution of vascular plants to the OM composition. The elevated ratio of iso and anteiso-branched fatty acids (FAs) relative to mid- and long-chain (C�20) n-FAs in the interstadial MIS 3 and the interglacial MIS 1 deposits suggests stronger microbial activity and consequently higher input of bacterial biomass during these climatically warmer periods. The overall high carbon preference index (CPI) and higher plant fatty acid (HPFA) values as well as high C=N ... |
format |
Article in Journal/Newspaper |
author |
Haugk, Charlotte Jongejans, Loeka L Mangelsdorf, Kai Fuchs, Matthias Ogneva, Olga Palmtag, Juri Mollenhauer, Gesine Mann, Paul James Overduin, Pier Paul Sanders, Tina Tuerena, Robyn E Schirrmeister, Lutz Wetterich, Sebastian Kizyakov, Alexander I Karger, Cornelia Strauss, Jens |
spellingShingle |
Haugk, Charlotte Jongejans, Loeka L Mangelsdorf, Kai Fuchs, Matthias Ogneva, Olga Palmtag, Juri Mollenhauer, Gesine Mann, Paul James Overduin, Pier Paul Sanders, Tina Tuerena, Robyn E Schirrmeister, Lutz Wetterich, Sebastian Kizyakov, Alexander I Karger, Cornelia Strauss, Jens Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region) |
author_facet |
Haugk, Charlotte Jongejans, Loeka L Mangelsdorf, Kai Fuchs, Matthias Ogneva, Olga Palmtag, Juri Mollenhauer, Gesine Mann, Paul James Overduin, Pier Paul Sanders, Tina Tuerena, Robyn E Schirrmeister, Lutz Wetterich, Sebastian Kizyakov, Alexander I Karger, Cornelia Strauss, Jens |
author_sort |
Haugk, Charlotte |
title |
Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region) |
title_short |
Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region) |
title_full |
Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region) |
title_fullStr |
Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region) |
title_full_unstemmed |
Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region) |
title_sort |
organic matter characteristics of a rapidly eroding permafrost cliff in ne siberia (lena delta, laptev sea region) |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/55959/ https://epic.awi.de/id/eprint/55959/1/Hauck_et_al_2022_bg-19-2079-2022.pdf https://hdl.handle.net/10013/epic.0d4b83da-7ef9-4ba8-b164-ba9deabb91fe |
geographic |
Arctic Laptev Sea |
geographic_facet |
Arctic Laptev Sea |
genre |
Arctic laptev Laptev Sea lena delta lena river permafrost Siberia |
genre_facet |
Arctic laptev Laptev Sea lena delta lena river permafrost Siberia |
op_source |
EPIC3Biogeosciences, COPERNICUS GESELLSCHAFT MBH, 19, pp. 2079-2094, ISSN: 1726-4170 |
op_relation |
https://epic.awi.de/id/eprint/55959/1/Hauck_et_al_2022_bg-19-2079-2022.pdf Haugk, C. , Jongejans, L. L. orcid:0000-0002-0383-4567 , Mangelsdorf, K. , Fuchs, M. orcid:0000-0003-3529-8284 , Ogneva, O. , Palmtag, J. , Mollenhauer, G. orcid:0000-0001-5138-564X , Mann, P. J. , Overduin, P. P. orcid:0000-0001-9849-4712 , Sanders, T. , Tuerena, R. E. , Schirrmeister, L. orcid:0000-0001-9455-0596 , Wetterich, S. orcid:0000-0001-9234-1192 , Kizyakov, A. I. , Karger, C. and Strauss, J. orcid:0000-0003-4678-4982 (2022) Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region) , Biogeosciences, 19 , pp. 2079-2094 . doi:10.5194/bg-19-2079-2022 <https://doi.org/10.5194/bg-19-2079-2022> , hdl:10013/epic.0d4b83da-7ef9-4ba8-b164-ba9deabb91fe |
op_doi |
https://doi.org/10.5194/bg-19-2079-2022 |
container_title |
Biogeosciences |
container_volume |
19 |
container_issue |
7 |
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2079 |
op_container_end_page |
2094 |
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1792044917103525888 |