Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane
Climate-driven permafrost thaw can release ancient carbon to the atmosphere, begetting further warming in a positive feedback loop. Polar ice core data and young radiocarbon ages of dissolved methane in thermokarst lakes have challenged the importance of this feedback, but field studies did not adeq...
Published in: | Communications Earth & Environment |
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Language: | English |
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2023
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Online Access: | https://curis.ku.dk/portal/da/publications/panarctic-lakes-exerted-a-small-positive-feedback-on-early-holocene-warming-due-to-deglacial-release-of-methane(f4961191-e97c-48ff-bae4-ee1c1067993a).html https://doi.org/10.1038/s43247-023-00930-2 https://curis.ku.dk/ws/files/361685134/s43247_023_00930_2.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/f4961191-e97c-48ff-bae4-ee1c1067993a 2024-05-19T07:41:50+00:00 Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane Brosius, L. S. Walter Anthony, K. M. Treat, C. C. Jones, M. C. Dyonisius, M. Grosse, G. 2023-07-25 application/pdf https://curis.ku.dk/portal/da/publications/panarctic-lakes-exerted-a-small-positive-feedback-on-early-holocene-warming-due-to-deglacial-release-of-methane(f4961191-e97c-48ff-bae4-ee1c1067993a).html https://doi.org/10.1038/s43247-023-00930-2 https://curis.ku.dk/ws/files/361685134/s43247_023_00930_2.pdf eng eng info:eu-repo/semantics/openAccess Brosius , L S , Walter Anthony , K M , Treat , C C , Jones , M C , Dyonisius , M & Grosse , G 2023 , ' Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane ' , Communications Earth and Environment , vol. 4 , no. 1 , 271 . https://doi.org/10.1038/s43247-023-00930-2 article 2023 ftcopenhagenunip https://doi.org/10.1038/s43247-023-00930-2 2024-05-02T00:33:22Z Climate-driven permafrost thaw can release ancient carbon to the atmosphere, begetting further warming in a positive feedback loop. Polar ice core data and young radiocarbon ages of dissolved methane in thermokarst lakes have challenged the importance of this feedback, but field studies did not adequately account for older methane released from permafrost through bubbling. We synthesized panarctic isotope and emissions datasets to derive integrated ages of panarctic lake methane fluxes. Methane age in modern thermokarst lakes (3132 ± 731 years before present) reflects remobilization of ancient carbon. Thermokarst-lake methane emissions fit within the constraints imposed by polar ice core data. Younger, albeit ultimately larger sources of methane from glacial lakes, estimated here, lagged those from thermokarst lakes. Our results imply that panarctic lake methane release was a small positive feedback to climate warming, comprising up to 17% of total northern hemisphere sources during the deglacial period. Article in Journal/Newspaper Ice ice core permafrost Thermokarst University of Copenhagen: Research Communications Earth & Environment 4 1 |
institution |
Open Polar |
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University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Climate-driven permafrost thaw can release ancient carbon to the atmosphere, begetting further warming in a positive feedback loop. Polar ice core data and young radiocarbon ages of dissolved methane in thermokarst lakes have challenged the importance of this feedback, but field studies did not adequately account for older methane released from permafrost through bubbling. We synthesized panarctic isotope and emissions datasets to derive integrated ages of panarctic lake methane fluxes. Methane age in modern thermokarst lakes (3132 ± 731 years before present) reflects remobilization of ancient carbon. Thermokarst-lake methane emissions fit within the constraints imposed by polar ice core data. Younger, albeit ultimately larger sources of methane from glacial lakes, estimated here, lagged those from thermokarst lakes. Our results imply that panarctic lake methane release was a small positive feedback to climate warming, comprising up to 17% of total northern hemisphere sources during the deglacial period. |
format |
Article in Journal/Newspaper |
author |
Brosius, L. S. Walter Anthony, K. M. Treat, C. C. Jones, M. C. Dyonisius, M. Grosse, G. |
spellingShingle |
Brosius, L. S. Walter Anthony, K. M. Treat, C. C. Jones, M. C. Dyonisius, M. Grosse, G. Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane |
author_facet |
Brosius, L. S. Walter Anthony, K. M. Treat, C. C. Jones, M. C. Dyonisius, M. Grosse, G. |
author_sort |
Brosius, L. S. |
title |
Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane |
title_short |
Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane |
title_full |
Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane |
title_fullStr |
Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane |
title_full_unstemmed |
Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane |
title_sort |
panarctic lakes exerted a small positive feedback on early holocene warming due to deglacial release of methane |
publishDate |
2023 |
url |
https://curis.ku.dk/portal/da/publications/panarctic-lakes-exerted-a-small-positive-feedback-on-early-holocene-warming-due-to-deglacial-release-of-methane(f4961191-e97c-48ff-bae4-ee1c1067993a).html https://doi.org/10.1038/s43247-023-00930-2 https://curis.ku.dk/ws/files/361685134/s43247_023_00930_2.pdf |
genre |
Ice ice core permafrost Thermokarst |
genre_facet |
Ice ice core permafrost Thermokarst |
op_source |
Brosius , L S , Walter Anthony , K M , Treat , C C , Jones , M C , Dyonisius , M & Grosse , G 2023 , ' Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane ' , Communications Earth and Environment , vol. 4 , no. 1 , 271 . https://doi.org/10.1038/s43247-023-00930-2 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s43247-023-00930-2 |
container_title |
Communications Earth & Environment |
container_volume |
4 |
container_issue |
1 |
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1799481451130912768 |