Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum
The Palaeocene-Eocene Thermal Maximum(1,2) (PETM) was a global warming event that occurred about 56 million years ago, and is commonly thought to have been driven primarily by the destabilization of carbon from surface sedimentary reservoirs such as methane hydrates(3). However, it remains controver...
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ftoceanrep:oai:oceanrep.geomar.de:39363 2023-05-15T17:34:40+02:00 Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum Gutjahr, Marcus Ridgwell, Andy Sexton, Philip F. Anagnostou, Eleni Pearson, Paul N. Pälike, Heiko Norris, Richard D. Thomas, Ellen Foster, Gavin L. 2017-08-31 text https://oceanrep.geomar.de/id/eprint/39363/ https://oceanrep.geomar.de/id/eprint/39363/1/Gutjahr%20et.al.pdf https://doi.org/10.1038/nature23646 en eng Nature Research https://oceanrep.geomar.de/id/eprint/39363/1/Gutjahr%20et.al.pdf Gutjahr, M. , Ridgwell, A., Sexton, P. F., Anagnostou, E. , Pearson, P. N., Pälike, H., Norris, R. D., Thomas, E. and Foster, G. L. (2017) Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum. Nature, 548 (7669). pp. 573-577. DOI 10.1038/nature23646 <https://doi.org/10.1038/nature23646>. doi:10.1038/nature23646 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2017 ftoceanrep https://doi.org/10.1038/nature23646 2023-04-07T15:35:17Z The Palaeocene-Eocene Thermal Maximum(1,2) (PETM) was a global warming event that occurred about 56 million years ago, and is commonly thought to have been driven primarily by the destabilization of carbon from surface sedimentary reservoirs such as methane hydrates(3). However, it remains controversial whether such reservoirs were indeed the source of the carbon that drove the warming(1,3-5). Resolving this issue is key to understanding the proximal cause of the warming, and to quantifying the roles of triggers versus feedbacks. Here we present boron isotope data-a proxy for seawater pH-that show that the ocean surface pH was persistently low during the PETM. We combine our pH data with a paired carbon isotope record in an Earth system model in order to reconstruct the unfolding carbon-cycle dynamics during the event(6,7). We find strong evidence for a much larger (more than 10,000 petagrams)-and, on average, isotopically heavier-carbon source than considered previously(8,9). This leads us to identify volcanism associated with the North Atlantic Igneous Province(10,11), rather than carbon from a surface reservoir, as the main driver of the PETM. This finding implies that climate-driven amplification of organic carbon feedbacks probably played only a minor part in driving the event. However, we find that enhanced burial of organic matter seems to have been important in eventually sequestering the released carbon and accelerating the recovery of the Earth system(12). Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Nature 548 7669 573 577 |
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English |
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The Palaeocene-Eocene Thermal Maximum(1,2) (PETM) was a global warming event that occurred about 56 million years ago, and is commonly thought to have been driven primarily by the destabilization of carbon from surface sedimentary reservoirs such as methane hydrates(3). However, it remains controversial whether such reservoirs were indeed the source of the carbon that drove the warming(1,3-5). Resolving this issue is key to understanding the proximal cause of the warming, and to quantifying the roles of triggers versus feedbacks. Here we present boron isotope data-a proxy for seawater pH-that show that the ocean surface pH was persistently low during the PETM. We combine our pH data with a paired carbon isotope record in an Earth system model in order to reconstruct the unfolding carbon-cycle dynamics during the event(6,7). We find strong evidence for a much larger (more than 10,000 petagrams)-and, on average, isotopically heavier-carbon source than considered previously(8,9). This leads us to identify volcanism associated with the North Atlantic Igneous Province(10,11), rather than carbon from a surface reservoir, as the main driver of the PETM. This finding implies that climate-driven amplification of organic carbon feedbacks probably played only a minor part in driving the event. However, we find that enhanced burial of organic matter seems to have been important in eventually sequestering the released carbon and accelerating the recovery of the Earth system(12). |
format |
Article in Journal/Newspaper |
author |
Gutjahr, Marcus Ridgwell, Andy Sexton, Philip F. Anagnostou, Eleni Pearson, Paul N. Pälike, Heiko Norris, Richard D. Thomas, Ellen Foster, Gavin L. |
spellingShingle |
Gutjahr, Marcus Ridgwell, Andy Sexton, Philip F. Anagnostou, Eleni Pearson, Paul N. Pälike, Heiko Norris, Richard D. Thomas, Ellen Foster, Gavin L. Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum |
author_facet |
Gutjahr, Marcus Ridgwell, Andy Sexton, Philip F. Anagnostou, Eleni Pearson, Paul N. Pälike, Heiko Norris, Richard D. Thomas, Ellen Foster, Gavin L. |
author_sort |
Gutjahr, Marcus |
title |
Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum |
title_short |
Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum |
title_full |
Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum |
title_fullStr |
Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum |
title_full_unstemmed |
Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum |
title_sort |
very large release of mostly volcanic carbon during the palaeocene–eocene thermal maximum |
publisher |
Nature Research |
publishDate |
2017 |
url |
https://oceanrep.geomar.de/id/eprint/39363/ https://oceanrep.geomar.de/id/eprint/39363/1/Gutjahr%20et.al.pdf https://doi.org/10.1038/nature23646 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/39363/1/Gutjahr%20et.al.pdf Gutjahr, M. , Ridgwell, A., Sexton, P. F., Anagnostou, E. , Pearson, P. N., Pälike, H., Norris, R. D., Thomas, E. and Foster, G. L. (2017) Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum. Nature, 548 (7669). pp. 573-577. DOI 10.1038/nature23646 <https://doi.org/10.1038/nature23646>. doi:10.1038/nature23646 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1038/nature23646 |
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Nature |
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548 |
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7669 |
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573 |
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577 |
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1766133562419970048 |