Ecosystem and soil respiration radiocarbon detects old carbon release as a fingerprint of warming and permafrost destabilization with climate change
The permafrost region has accumulated organic carbon in cold and waterlogged soils over thousands of years and now contains three times as much carbon as the atmosphere. Global warming is degrading permafrost with the potential to accelerate climate change as increased microbial decomposition releas...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642809/ http://www.ncbi.nlm.nih.gov/pubmed/37807688 https://doi.org/10.1098/rsta.2022.0201 |
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ftpubmed:oai:pubmedcentral.nih.gov:10642809 2023-12-17T10:48:25+01:00 Ecosystem and soil respiration radiocarbon detects old carbon release as a fingerprint of warming and permafrost destabilization with climate change Schuur, Edward A. G. Hicks Pries, Caitlin Mauritz, Marguerite Pegoraro, Elaine Rodenhizer, Heidi See, Craig Ebert, Chris 2023-11-27 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642809/ http://www.ncbi.nlm.nih.gov/pubmed/37807688 https://doi.org/10.1098/rsta.2022.0201 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642809/ http://www.ncbi.nlm.nih.gov/pubmed/37807688 http://dx.doi.org/10.1098/rsta.2022.0201 © 2023 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. Philos Trans A Math Phys Eng Sci Articles Text 2023 ftpubmed https://doi.org/10.1098/rsta.2022.0201 2023-11-19T01:54:04Z The permafrost region has accumulated organic carbon in cold and waterlogged soils over thousands of years and now contains three times as much carbon as the atmosphere. Global warming is degrading permafrost with the potential to accelerate climate change as increased microbial decomposition releases soil carbon as greenhouse gases. A 19-year time series of soil and ecosystem respiration radiocarbon from Alaska provides long-term insight into changing permafrost soil carbon dynamics in a warmer world. Nine per cent of ecosystem respiration and 23% of soil respiration observations had radiocarbon values more than 50‰ lower than the atmospheric value. Furthermore, the overall trend of ecosystem and soil respiration radiocarbon values through time decreased more than atmospheric radiocarbon values did, indicating that old carbon degradation was enhanced. Boosted regression tree analyses showed that temperature and moisture environmental variables had the largest relative influence on lower radiocarbon values. This suggested that old carbon degradation was controlled by warming/permafrost thaw and soil drying together, as waterlogged soil conditions could protect soil carbon from microbial decomposition even when thawed. Overall, changing conditions increasingly favoured the release of old carbon, which is a definitive fingerprint of an accelerating feedback to climate change as a consequence of warming and permafrost destabilization. This article is part of the Theo Murphy meeting issue ‘Radiocarbon in the Anthropocene’. Text permafrost Alaska PubMed Central (PMC) Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 381 2261 |
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Articles Schuur, Edward A. G. Hicks Pries, Caitlin Mauritz, Marguerite Pegoraro, Elaine Rodenhizer, Heidi See, Craig Ebert, Chris Ecosystem and soil respiration radiocarbon detects old carbon release as a fingerprint of warming and permafrost destabilization with climate change |
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description |
The permafrost region has accumulated organic carbon in cold and waterlogged soils over thousands of years and now contains three times as much carbon as the atmosphere. Global warming is degrading permafrost with the potential to accelerate climate change as increased microbial decomposition releases soil carbon as greenhouse gases. A 19-year time series of soil and ecosystem respiration radiocarbon from Alaska provides long-term insight into changing permafrost soil carbon dynamics in a warmer world. Nine per cent of ecosystem respiration and 23% of soil respiration observations had radiocarbon values more than 50‰ lower than the atmospheric value. Furthermore, the overall trend of ecosystem and soil respiration radiocarbon values through time decreased more than atmospheric radiocarbon values did, indicating that old carbon degradation was enhanced. Boosted regression tree analyses showed that temperature and moisture environmental variables had the largest relative influence on lower radiocarbon values. This suggested that old carbon degradation was controlled by warming/permafrost thaw and soil drying together, as waterlogged soil conditions could protect soil carbon from microbial decomposition even when thawed. Overall, changing conditions increasingly favoured the release of old carbon, which is a definitive fingerprint of an accelerating feedback to climate change as a consequence of warming and permafrost destabilization. This article is part of the Theo Murphy meeting issue ‘Radiocarbon in the Anthropocene’. |
format |
Text |
author |
Schuur, Edward A. G. Hicks Pries, Caitlin Mauritz, Marguerite Pegoraro, Elaine Rodenhizer, Heidi See, Craig Ebert, Chris |
author_facet |
Schuur, Edward A. G. Hicks Pries, Caitlin Mauritz, Marguerite Pegoraro, Elaine Rodenhizer, Heidi See, Craig Ebert, Chris |
author_sort |
Schuur, Edward A. G. |
title |
Ecosystem and soil respiration radiocarbon detects old carbon release as a fingerprint of warming and permafrost destabilization with climate change |
title_short |
Ecosystem and soil respiration radiocarbon detects old carbon release as a fingerprint of warming and permafrost destabilization with climate change |
title_full |
Ecosystem and soil respiration radiocarbon detects old carbon release as a fingerprint of warming and permafrost destabilization with climate change |
title_fullStr |
Ecosystem and soil respiration radiocarbon detects old carbon release as a fingerprint of warming and permafrost destabilization with climate change |
title_full_unstemmed |
Ecosystem and soil respiration radiocarbon detects old carbon release as a fingerprint of warming and permafrost destabilization with climate change |
title_sort |
ecosystem and soil respiration radiocarbon detects old carbon release as a fingerprint of warming and permafrost destabilization with climate change |
publisher |
The Royal Society |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642809/ http://www.ncbi.nlm.nih.gov/pubmed/37807688 https://doi.org/10.1098/rsta.2022.0201 |
genre |
permafrost Alaska |
genre_facet |
permafrost Alaska |
op_source |
Philos Trans A Math Phys Eng Sci |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642809/ http://www.ncbi.nlm.nih.gov/pubmed/37807688 http://dx.doi.org/10.1098/rsta.2022.0201 |
op_rights |
© 2023 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
op_doi |
https://doi.org/10.1098/rsta.2022.0201 |
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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381 |
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2261 |
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