Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost
Abstract 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 o...
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ftdoajarticles:oai:doaj.org/article:d05c37fb3f1543f7adfff3ba22b5f516 2023-05-15T14:46:35+02:00 Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost Xiaowen Zhang Thomas S. Bianchi Andrea J. M. Hanna Michael R. Shields Gareth Izon Jack A. Hutchings Chien‐Lu Ping Mikhail Kanevskiy Negar Haghipour Timothy I. Eglinton 2021-06-01T00:00:00Z https://doi.org/10.1029/2021AV000396 https://doaj.org/article/d05c37fb3f1543f7adfff3ba22b5f516 EN eng Wiley https://doi.org/10.1029/2021AV000396 https://doaj.org/toc/2576-604X 2576-604X doi:10.1029/2021AV000396 https://doaj.org/article/d05c37fb3f1543f7adfff3ba22b5f516 AGU Advances, Vol 2, Iss 2, Pp n/a-n/a (2021) Arctic bulk OC long‐chain fatty acid permafrost radiocarbon Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 article 2021 ftdoajarticles https://doi.org/10.1029/2021AV000396 2022-12-30T23:05:47Z Abstract 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. Article in Journal/Newspaper Arctic Ice permafrost Directory of Open Access Journals: DOAJ Articles Arctic AGU Advances 2 2 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic bulk OC long‐chain fatty acid permafrost radiocarbon Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Arctic bulk OC long‐chain fatty acid permafrost radiocarbon Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 Xiaowen Zhang Thomas S. Bianchi Andrea J. M. Hanna Michael R. Shields Gareth Izon Jack A. Hutchings Chien‐Lu Ping Mikhail Kanevskiy Negar Haghipour Timothy I. Eglinton Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost |
topic_facet |
Arctic bulk OC long‐chain fatty acid permafrost radiocarbon Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 |
description |
Abstract 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. |
format |
Article in Journal/Newspaper |
author |
Xiaowen Zhang Thomas S. Bianchi Andrea J. M. Hanna Michael R. Shields Gareth Izon Jack A. Hutchings Chien‐Lu Ping Mikhail Kanevskiy Negar Haghipour Timothy I. Eglinton |
author_facet |
Xiaowen Zhang Thomas S. Bianchi Andrea J. M. Hanna Michael R. Shields Gareth Izon Jack A. Hutchings Chien‐Lu Ping Mikhail Kanevskiy Negar Haghipour Timothy I. Eglinton |
author_sort |
Xiaowen Zhang |
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://doi.org/10.1029/2021AV000396 https://doaj.org/article/d05c37fb3f1543f7adfff3ba22b5f516 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost |
genre_facet |
Arctic Ice permafrost |
op_source |
AGU Advances, Vol 2, Iss 2, Pp n/a-n/a (2021) |
op_relation |
https://doi.org/10.1029/2021AV000396 https://doaj.org/toc/2576-604X 2576-604X doi:10.1029/2021AV000396 https://doaj.org/article/d05c37fb3f1543f7adfff3ba22b5f516 |
op_doi |
https://doi.org/10.1029/2021AV000396 |
container_title |
AGU Advances |
container_volume |
2 |
container_issue |
2 |
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1766317785626968064 |