n-Alkane composition of organic matter in a rapidly eroding permafrost cliff
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...
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Format: | Dataset |
Language: | English |
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PANGAEA
2021
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.935658 https://doi.org/10.1594/PANGAEA.935658 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.935658 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI Arctic Land Expedition Biomarker CACOON Carbon Changing Arctic Carbon cycle in the cOastal Ocean Near-shore erosion Event label Height above river level n-alkane n-Alkane C14 per unit mass total organic carbon per unit sediment mass n-Alkane C15 n-Alkane C16 n-Alkane C17 n-Alkane C18 n-Alkane C19 n-Alkane C20 n-Alkane C21 n-Alkane C22 n-Alkane C23 n-Alkane C24 |
spellingShingle |
AWI Arctic Land Expedition Biomarker CACOON Carbon Changing Arctic Carbon cycle in the cOastal Ocean Near-shore erosion Event label Height above river level n-alkane n-Alkane C14 per unit mass total organic carbon per unit sediment mass n-Alkane C15 n-Alkane C16 n-Alkane C17 n-Alkane C18 n-Alkane C19 n-Alkane C20 n-Alkane C21 n-Alkane C22 n-Alkane C23 n-Alkane C24 Haugk, Charlotte Jongejans, Loeka Laura Mangelsdorf, Kai Fuchs, Matthias Ogneva, Olga Palmtag, Juri Mollenhauer, Gesine Mann, Paul James Overduin, Pier Paul Grosse, Guido Sanders, Tina Tuerena, Robyn E Schirrmeister, Lutz Wetterich, Sebastian Kizyakov, Alexander Strauss, Jens n-Alkane composition of organic matter in a rapidly eroding permafrost cliff |
topic_facet |
AWI Arctic Land Expedition Biomarker CACOON Carbon Changing Arctic Carbon cycle in the cOastal Ocean Near-shore erosion Event label Height above river level n-alkane n-Alkane C14 per unit mass total organic carbon per unit sediment mass n-Alkane C15 n-Alkane C16 n-Alkane C17 n-Alkane C18 n-Alkane C19 n-Alkane C20 n-Alkane C21 n-Alkane C22 n-Alkane C23 n-Alkane C24 |
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 are still poorly quantified. 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 ka. We show that the ancient permafrost exposed in the Sobo-Sise cliff has a high organic carbon content (mean of about 5 wt%).We found that the OM quality, which we define as the intrinsic potential to further transformation, decomposition, and mineralization, is also high as inferred by the lipid biomarker inventory. The oldest sediments stem from Marine Isotope Stage (MIS) 3 interstadial deposits (dated to 52 to 28 cal kyr BP) and is 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 FAs relative to 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 ... |
format |
Dataset |
author |
Haugk, Charlotte Jongejans, Loeka Laura Mangelsdorf, Kai Fuchs, Matthias Ogneva, Olga Palmtag, Juri Mollenhauer, Gesine Mann, Paul James Overduin, Pier Paul Grosse, Guido Sanders, Tina Tuerena, Robyn E Schirrmeister, Lutz Wetterich, Sebastian Kizyakov, Alexander Strauss, Jens |
author_facet |
Haugk, Charlotte Jongejans, Loeka Laura Mangelsdorf, Kai Fuchs, Matthias Ogneva, Olga Palmtag, Juri Mollenhauer, Gesine Mann, Paul James Overduin, Pier Paul Grosse, Guido Sanders, Tina Tuerena, Robyn E Schirrmeister, Lutz Wetterich, Sebastian Kizyakov, Alexander Strauss, Jens |
author_sort |
Haugk, Charlotte |
title |
n-Alkane composition of organic matter in a rapidly eroding permafrost cliff |
title_short |
n-Alkane composition of organic matter in a rapidly eroding permafrost cliff |
title_full |
n-Alkane composition of organic matter in a rapidly eroding permafrost cliff |
title_fullStr |
n-Alkane composition of organic matter in a rapidly eroding permafrost cliff |
title_full_unstemmed |
n-Alkane composition of organic matter in a rapidly eroding permafrost cliff |
title_sort |
n-alkane composition of organic matter in a rapidly eroding permafrost cliff |
publisher |
PANGAEA |
publishDate |
2021 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.935658 https://doi.org/10.1594/PANGAEA.935658 |
op_coverage |
MEDIAN LATITUDE: 72.538530 * MEDIAN LONGITUDE: 128.280873 * SOUTH-BOUND LATITUDE: 72.538120 * WEST-BOUND LONGITUDE: 128.279830 * NORTH-BOUND LATITUDE: 72.538770 * EAST-BOUND LONGITUDE: 128.282670 * DATE/TIME START: 2018-07-14T00:00:00 * DATE/TIME END: 2018-07-18T00:00:00 |
long_lat |
ENVELOPE(128.279830,128.282670,72.538770,72.538120) |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic lena river permafrost |
genre_facet |
Arctic lena river permafrost |
op_relation |
https://doi.org/10.1594/PANGAEA.935672 Haugk, Charlotte; Jongejans, Loeka Laura; Mangelsdorf, Kai; Fuchs, Matthias; Ogneva, Olga; Palmtag, Juri; Mollenhauer, Gesine; Mann, Paul James; Overduin, Pier Paul; Grosse, Guido; Sanders, Tina; Tuerena, Robyn E; Schirrmeister, Lutz; Wetterich, Sebastian; Kizyakov, Alexander; Karger, Cornelia; Strauss, Jens (2022): Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region). Biogeosciences, 19(7), 2079-2094, https://doi.org/10.5194/bg-19-2079-2022 https://doi.pangaea.de/10.1594/PANGAEA.935658 https://doi.org/10.1594/PANGAEA.935658 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.93565810.1594/PANGAEA.93567210.5194/bg-19-2079-2022 |
_version_ |
1800746093483393024 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.935658 2024-06-02T08:01:41+00:00 n-Alkane composition of organic matter in a rapidly eroding permafrost cliff Haugk, Charlotte Jongejans, Loeka Laura Mangelsdorf, Kai Fuchs, Matthias Ogneva, Olga Palmtag, Juri Mollenhauer, Gesine Mann, Paul James Overduin, Pier Paul Grosse, Guido Sanders, Tina Tuerena, Robyn E Schirrmeister, Lutz Wetterich, Sebastian Kizyakov, Alexander Strauss, Jens MEDIAN LATITUDE: 72.538530 * MEDIAN LONGITUDE: 128.280873 * SOUTH-BOUND LATITUDE: 72.538120 * WEST-BOUND LONGITUDE: 128.279830 * NORTH-BOUND LATITUDE: 72.538770 * EAST-BOUND LONGITUDE: 128.282670 * DATE/TIME START: 2018-07-14T00:00:00 * DATE/TIME END: 2018-07-18T00:00:00 2021 text/tab-separated-values, 1294 data points https://doi.pangaea.de/10.1594/PANGAEA.935658 https://doi.org/10.1594/PANGAEA.935658 en eng PANGAEA https://doi.org/10.1594/PANGAEA.935672 Haugk, Charlotte; Jongejans, Loeka Laura; Mangelsdorf, Kai; Fuchs, Matthias; Ogneva, Olga; Palmtag, Juri; Mollenhauer, Gesine; Mann, Paul James; Overduin, Pier Paul; Grosse, Guido; Sanders, Tina; Tuerena, Robyn E; Schirrmeister, Lutz; Wetterich, Sebastian; Kizyakov, Alexander; Karger, Cornelia; Strauss, Jens (2022): Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region). Biogeosciences, 19(7), 2079-2094, https://doi.org/10.5194/bg-19-2079-2022 https://doi.pangaea.de/10.1594/PANGAEA.935658 https://doi.org/10.1594/PANGAEA.935658 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess AWI Arctic Land Expedition Biomarker CACOON Carbon Changing Arctic Carbon cycle in the cOastal Ocean Near-shore erosion Event label Height above river level n-alkane n-Alkane C14 per unit mass total organic carbon per unit sediment mass n-Alkane C15 n-Alkane C16 n-Alkane C17 n-Alkane C18 n-Alkane C19 n-Alkane C20 n-Alkane C21 n-Alkane C22 n-Alkane C23 n-Alkane C24 Dataset 2021 ftpangaea https://doi.org/10.1594/PANGAEA.93565810.1594/PANGAEA.93567210.5194/bg-19-2079-2022 2024-05-07T23:45:54Z 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 are still poorly quantified. 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 ka. We show that the ancient permafrost exposed in the Sobo-Sise cliff has a high organic carbon content (mean of about 5 wt%).We found that the OM quality, which we define as the intrinsic potential to further transformation, decomposition, and mineralization, is also high as inferred by the lipid biomarker inventory. The oldest sediments stem from Marine Isotope Stage (MIS) 3 interstadial deposits (dated to 52 to 28 cal kyr BP) and is 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 FAs relative to 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 ... Dataset Arctic lena river permafrost PANGAEA - Data Publisher for Earth & Environmental Science Arctic ENVELOPE(128.279830,128.282670,72.538770,72.538120) |