Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost
Climate-driven thawing of Arctic permafrost renders its vast carbon reserves susceptible to microbial degradation, serving as a potentially potent positive feedback hidden within the climate system. While seemingly intuitive, the relationship between thermally driven permafrost losses and organic ca...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/494649 2023-05-15T14:50:54+02:00 Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost Zhang, Xiaowen Bianchi, Thomas S. Hanna, Andrea J. M. Shields, Michael R. Izon, Gareth Hutchings, Jack A. Ping, Chien-Lu Kanevskiy, Mikhail Haghipour, Negar Eglinton, Timothy I. 2021-06 application/application/pdf https://hdl.handle.net/20.500.11850/494649 https://doi.org/10.3929/ethz-b-000494649 en eng Wiley info:eu-repo/semantics/altIdentifier/doi/10.1029/2021AV000396 info:eu-repo/semantics/altIdentifier/wos/000668814900003 http://hdl.handle.net/20.500.11850/494649 doi:10.3929/ethz-b-000494649 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International CC-BY AGU Advances, 2 (2) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftethz https://doi.org/20.500.11850/494649 https://doi.org/10.3929/ethz-b-000494649 https://doi.org/10.1029/2021AV000396 2023-02-13T00:56:45Z Climate-driven thawing of Arctic permafrost renders its vast carbon reserves susceptible to microbial degradation, serving as a potentially potent positive feedback hidden within the climate system. While seemingly intuitive, the relationship between thermally driven permafrost losses and organic carbon (OC) export remains largely unexplored in natural settings. Filling this knowledge gap, we present down-core bulk and compound-specific radiocarbon records of permafrost change from a sediment core taken within the Alaskan Colville River delta spanning the last c. 2,700 years. Fingerprinted by significantly older radiocarbon ages of bulk OC and long-chain fatty acids, these data expose a thermally driven increase in permafrost OC export and/or deepening of mobilizable permafrost layers over the last c. 160 years after the Little Ice Age. Comparison of OC content and radiocarbon data between recent and Roman warming episodes likely implies that the rate of warming, alongside the prevailing boundary conditions, may dictate the ultimate fate of the Arctic's permafrost inventory. Our findings highlight the importance of leveraging geological records as archives of Arctic permafrost mobilization dynamics with temperature change. ISSN:2576-604X Article in Journal/Newspaper Arctic Ice permafrost ETH Zürich Research Collection Arctic |
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Open Polar |
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ETH Zürich Research Collection |
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ftethz |
language |
English |
description |
Climate-driven thawing of Arctic permafrost renders its vast carbon reserves susceptible to microbial degradation, serving as a potentially potent positive feedback hidden within the climate system. While seemingly intuitive, the relationship between thermally driven permafrost losses and organic carbon (OC) export remains largely unexplored in natural settings. Filling this knowledge gap, we present down-core bulk and compound-specific radiocarbon records of permafrost change from a sediment core taken within the Alaskan Colville River delta spanning the last c. 2,700 years. Fingerprinted by significantly older radiocarbon ages of bulk OC and long-chain fatty acids, these data expose a thermally driven increase in permafrost OC export and/or deepening of mobilizable permafrost layers over the last c. 160 years after the Little Ice Age. Comparison of OC content and radiocarbon data between recent and Roman warming episodes likely implies that the rate of warming, alongside the prevailing boundary conditions, may dictate the ultimate fate of the Arctic's permafrost inventory. Our findings highlight the importance of leveraging geological records as archives of Arctic permafrost mobilization dynamics with temperature change. ISSN:2576-604X |
format |
Article in Journal/Newspaper |
author |
Zhang, Xiaowen Bianchi, Thomas S. Hanna, Andrea J. M. Shields, Michael R. Izon, Gareth Hutchings, Jack A. Ping, Chien-Lu Kanevskiy, Mikhail Haghipour, Negar Eglinton, Timothy I. |
spellingShingle |
Zhang, Xiaowen Bianchi, Thomas S. Hanna, Andrea J. M. Shields, Michael R. Izon, Gareth Hutchings, Jack A. Ping, Chien-Lu Kanevskiy, Mikhail Haghipour, Negar Eglinton, Timothy I. Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost |
author_facet |
Zhang, Xiaowen Bianchi, Thomas S. Hanna, Andrea J. M. Shields, Michael R. Izon, Gareth Hutchings, Jack A. Ping, Chien-Lu Kanevskiy, Mikhail Haghipour, Negar Eglinton, Timothy I. |
author_sort |
Zhang, Xiaowen |
title |
Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost |
title_short |
Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost |
title_full |
Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost |
title_fullStr |
Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost |
title_full_unstemmed |
Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost |
title_sort |
recent warming fuels increased organic carbon export from arctic permafrost |
publisher |
Wiley |
publishDate |
2021 |
url |
https://hdl.handle.net/20.500.11850/494649 https://doi.org/10.3929/ethz-b-000494649 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost |
genre_facet |
Arctic Ice permafrost |
op_source |
AGU Advances, 2 (2) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021AV000396 info:eu-repo/semantics/altIdentifier/wos/000668814900003 http://hdl.handle.net/20.500.11850/494649 doi:10.3929/ethz-b-000494649 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.11850/494649 https://doi.org/10.3929/ethz-b-000494649 https://doi.org/10.1029/2021AV000396 |
_version_ |
1766321956604346368 |