Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane
Abstract 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...
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Online Access: | https://doi.org/10.1038/s43247-023-00930-2 https://doaj.org/article/6f8853a733724e8e899209befeb4561f |
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ftdoajarticles:oai:doaj.org/article:6f8853a733724e8e899209befeb4561f 2023-08-27T04:09:55+02:00 Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane L. S. Brosius K. M. Walter Anthony C. C. Treat M. C. Jones M. Dyonisius G. Grosse 2023-07-01T00:00:00Z https://doi.org/10.1038/s43247-023-00930-2 https://doaj.org/article/6f8853a733724e8e899209befeb4561f EN eng Nature Portfolio https://doi.org/10.1038/s43247-023-00930-2 https://doaj.org/toc/2662-4435 doi:10.1038/s43247-023-00930-2 2662-4435 https://doaj.org/article/6f8853a733724e8e899209befeb4561f Communications Earth & Environment, Vol 4, Iss 1, Pp 1-11 (2023) Geology QE1-996.5 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.1038/s43247-023-00930-2 2023-08-06T00:49:10Z Abstract 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 Directory of Open Access Journals: DOAJ Articles Communications Earth & Environment 4 1 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 Environmental sciences GE1-350 |
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Geology QE1-996.5 Environmental sciences GE1-350 L. S. Brosius K. M. Walter Anthony C. C. Treat M. C. Jones M. Dyonisius G. Grosse Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane |
topic_facet |
Geology QE1-996.5 Environmental sciences GE1-350 |
description |
Abstract 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 |
L. S. Brosius K. M. Walter Anthony C. C. Treat M. C. Jones M. Dyonisius G. Grosse |
author_facet |
L. S. Brosius K. M. Walter Anthony C. C. Treat M. C. Jones M. Dyonisius G. Grosse |
author_sort |
L. S. Brosius |
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 |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s43247-023-00930-2 https://doaj.org/article/6f8853a733724e8e899209befeb4561f |
genre |
Ice ice core permafrost Thermokarst |
genre_facet |
Ice ice core permafrost Thermokarst |
op_source |
Communications Earth & Environment, Vol 4, Iss 1, Pp 1-11 (2023) |
op_relation |
https://doi.org/10.1038/s43247-023-00930-2 https://doaj.org/toc/2662-4435 doi:10.1038/s43247-023-00930-2 2662-4435 https://doaj.org/article/6f8853a733724e8e899209befeb4561f |
op_doi |
https://doi.org/10.1038/s43247-023-00930-2 |
container_title |
Communications Earth & Environment |
container_volume |
4 |
container_issue |
1 |
_version_ |
1775351611983396864 |