Permafrost thawing as a possible source of abrupt carbon release at the onset of the Bølling/Allerød
One of the most abrupt and yet unexplained past rises in atmospheric CO2 (>10 p.p.m.v. in two centuries) occurred in quasi-synchrony with abrupt northern hemispheric warming into the Bølling/Allerød, ~14,600 years ago. Here we use a U/Th-dated record of atmospheric Δ14C from Tahiti corals to prov...
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ftpubmed:oai:pubmedcentral.nih.gov:4263146 2023-05-15T17:56:56+02:00 Permafrost thawing as a possible source of abrupt carbon release at the onset of the Bølling/Allerød Köhler, Peter Knorr, Gregor Bard, Edouard 2014-11-20 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4263146 http://www.ncbi.nlm.nih.gov/pubmed/25409739 https://doi.org/10.1038/ncomms6520 en eng Nature Pub. Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/25409739 http://dx.doi.org/10.1038/ncomms6520 Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/3.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2014 ftpubmed https://doi.org/10.1038/ncomms6520 2014-12-21T01:01:31Z One of the most abrupt and yet unexplained past rises in atmospheric CO2 (>10 p.p.m.v. in two centuries) occurred in quasi-synchrony with abrupt northern hemispheric warming into the Bølling/Allerød, ~14,600 years ago. Here we use a U/Th-dated record of atmospheric Δ14C from Tahiti corals to provide an independent and precise age control for this CO2 rise. We also use model simulations to show that the release of old (nearly 14C-free) carbon can explain these changes in CO2 and Δ14C. The Δ14C record provides an independent constraint on the amount of carbon released (~125 Pg C). We suggest, in line with observations of atmospheric CH4 and terrigenous biomarkers, that thawing permafrost in high northern latitudes could have been the source of carbon, possibly with contribution from flooding of the Siberian continental shelf during meltwater pulse 1A. Our findings highlight the potential of the permafrost carbon reservoir to modulate abrupt climate changes via greenhouse-gas feedbacks. Text permafrost PubMed Central (PMC) Nature Communications 5 1 |
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Article Köhler, Peter Knorr, Gregor Bard, Edouard Permafrost thawing as a possible source of abrupt carbon release at the onset of the Bølling/Allerød |
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Article |
description |
One of the most abrupt and yet unexplained past rises in atmospheric CO2 (>10 p.p.m.v. in two centuries) occurred in quasi-synchrony with abrupt northern hemispheric warming into the Bølling/Allerød, ~14,600 years ago. Here we use a U/Th-dated record of atmospheric Δ14C from Tahiti corals to provide an independent and precise age control for this CO2 rise. We also use model simulations to show that the release of old (nearly 14C-free) carbon can explain these changes in CO2 and Δ14C. The Δ14C record provides an independent constraint on the amount of carbon released (~125 Pg C). We suggest, in line with observations of atmospheric CH4 and terrigenous biomarkers, that thawing permafrost in high northern latitudes could have been the source of carbon, possibly with contribution from flooding of the Siberian continental shelf during meltwater pulse 1A. Our findings highlight the potential of the permafrost carbon reservoir to modulate abrupt climate changes via greenhouse-gas feedbacks. |
format |
Text |
author |
Köhler, Peter Knorr, Gregor Bard, Edouard |
author_facet |
Köhler, Peter Knorr, Gregor Bard, Edouard |
author_sort |
Köhler, Peter |
title |
Permafrost thawing as a possible source of abrupt carbon release at the onset of the Bølling/Allerød |
title_short |
Permafrost thawing as a possible source of abrupt carbon release at the onset of the Bølling/Allerød |
title_full |
Permafrost thawing as a possible source of abrupt carbon release at the onset of the Bølling/Allerød |
title_fullStr |
Permafrost thawing as a possible source of abrupt carbon release at the onset of the Bølling/Allerød |
title_full_unstemmed |
Permafrost thawing as a possible source of abrupt carbon release at the onset of the Bølling/Allerød |
title_sort |
permafrost thawing as a possible source of abrupt carbon release at the onset of the bølling/allerød |
publisher |
Nature Pub. Group |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4263146 http://www.ncbi.nlm.nih.gov/pubmed/25409739 https://doi.org/10.1038/ncomms6520 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/25409739 http://dx.doi.org/10.1038/ncomms6520 |
op_rights |
Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/3.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
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CC-BY |
op_doi |
https://doi.org/10.1038/ncomms6520 |
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Nature Communications |
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5 |
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1 |
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1766165252028760064 |