Increased export production during recovery from the Paleocene–Eocene thermal maximum constrained by sedimentary Ba isotopes
Highlights • Novel approach to constrain past export production using Ba isotopes. • Ba isotopes improve reliability of the Ba accumulation productivity proxy. • Higher productivity during PETM recovery contributed to rapid carbon sequestration. Abstract The Paleocene–Eocene thermal maximum (PETM; ∼...
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Online Access: | https://oceanrep.geomar.de/id/eprint/46280/ https://oceanrep.geomar.de/id/eprint/46280/1/Bridgestock.pdf https://doi.org/10.1016/j.epsl.2018.12.036 |
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ftoceanrep:oai:oceanrep.geomar.de:46280 2023-05-15T18:25:48+02:00 Increased export production during recovery from the Paleocene–Eocene thermal maximum constrained by sedimentary Ba isotopes Bridgestock, Luke Hsieh, Yu-Te Porcelli, Donald Henderson, Gideon M. 2019 text https://oceanrep.geomar.de/id/eprint/46280/ https://oceanrep.geomar.de/id/eprint/46280/1/Bridgestock.pdf https://doi.org/10.1016/j.epsl.2018.12.036 en eng Elsevier https://oceanrep.geomar.de/id/eprint/46280/1/Bridgestock.pdf Bridgestock, L. , Hsieh, Y. T., Porcelli, D. and Henderson, G. M. (2019) Increased export production during recovery from the Paleocene–Eocene thermal maximum constrained by sedimentary Ba isotopes. Earth and Planetary Science Letters, 510 . pp. 53-63. DOI 10.1016/j.epsl.2018.12.036 <https://doi.org/10.1016/j.epsl.2018.12.036>. doi:10.1016/j.epsl.2018.12.036 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2019 ftoceanrep https://doi.org/10.1016/j.epsl.2018.12.036 2023-04-07T15:44:49Z Highlights • Novel approach to constrain past export production using Ba isotopes. • Ba isotopes improve reliability of the Ba accumulation productivity proxy. • Higher productivity during PETM recovery contributed to rapid carbon sequestration. Abstract The Paleocene–Eocene thermal maximum (PETM; ∼56 Ma) was a transient global warming event associated with a huge perturbation to the global carbon cycle. Changes in marine biological productivity may have contributed to the rapid recovery from this climate change event, by driving the burial of inorganic and organic carbon. Disagreement between proxy reconstructions, however, makes the response of biological productivity to climatic changes experienced during the PETM uncertain. Accumulation of non-detrital barium (Ba) in marine sediments is a commonly used proxy for export production. This proxy however can be compromised by artifacts resulting from dilution and changes in barite preservation, issues that have been debated for its application to sediments deposited during the PETM. Here we present a new approach to address these limitations, by combining non-detrital Ba accumulation with Ba isotope data for marine PETM sediments. Observed positive correlation between these variables is consistent with their control by local changes in export production. These results help resolve previous discrepancies between productivity reconstructions, and indicate export production at sites in the Southern Ocean and South Atlantic decreased or remained unchanged following the PETM onset, followed by an increase to maximum values in the PETM recovery period. This increase in export production coincides with elevated carbonate accumulation rates, representing an important mode of carbon sequestration. These new constraints therefore support the idea that increased production and export of calcifying nannoplankton, perhaps driven by changes in ocean stratification and/or terrestrial runoff, played an important role in rapid recovery from the PETM. This work also demonstrates ... Article in Journal/Newspaper Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Southern Ocean Earth and Planetary Science Letters 510 53 63 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Highlights • Novel approach to constrain past export production using Ba isotopes. • Ba isotopes improve reliability of the Ba accumulation productivity proxy. • Higher productivity during PETM recovery contributed to rapid carbon sequestration. Abstract The Paleocene–Eocene thermal maximum (PETM; ∼56 Ma) was a transient global warming event associated with a huge perturbation to the global carbon cycle. Changes in marine biological productivity may have contributed to the rapid recovery from this climate change event, by driving the burial of inorganic and organic carbon. Disagreement between proxy reconstructions, however, makes the response of biological productivity to climatic changes experienced during the PETM uncertain. Accumulation of non-detrital barium (Ba) in marine sediments is a commonly used proxy for export production. This proxy however can be compromised by artifacts resulting from dilution and changes in barite preservation, issues that have been debated for its application to sediments deposited during the PETM. Here we present a new approach to address these limitations, by combining non-detrital Ba accumulation with Ba isotope data for marine PETM sediments. Observed positive correlation between these variables is consistent with their control by local changes in export production. These results help resolve previous discrepancies between productivity reconstructions, and indicate export production at sites in the Southern Ocean and South Atlantic decreased or remained unchanged following the PETM onset, followed by an increase to maximum values in the PETM recovery period. This increase in export production coincides with elevated carbonate accumulation rates, representing an important mode of carbon sequestration. These new constraints therefore support the idea that increased production and export of calcifying nannoplankton, perhaps driven by changes in ocean stratification and/or terrestrial runoff, played an important role in rapid recovery from the PETM. This work also demonstrates ... |
format |
Article in Journal/Newspaper |
author |
Bridgestock, Luke Hsieh, Yu-Te Porcelli, Donald Henderson, Gideon M. |
spellingShingle |
Bridgestock, Luke Hsieh, Yu-Te Porcelli, Donald Henderson, Gideon M. Increased export production during recovery from the Paleocene–Eocene thermal maximum constrained by sedimentary Ba isotopes |
author_facet |
Bridgestock, Luke Hsieh, Yu-Te Porcelli, Donald Henderson, Gideon M. |
author_sort |
Bridgestock, Luke |
title |
Increased export production during recovery from the Paleocene–Eocene thermal maximum constrained by sedimentary Ba isotopes |
title_short |
Increased export production during recovery from the Paleocene–Eocene thermal maximum constrained by sedimentary Ba isotopes |
title_full |
Increased export production during recovery from the Paleocene–Eocene thermal maximum constrained by sedimentary Ba isotopes |
title_fullStr |
Increased export production during recovery from the Paleocene–Eocene thermal maximum constrained by sedimentary Ba isotopes |
title_full_unstemmed |
Increased export production during recovery from the Paleocene–Eocene thermal maximum constrained by sedimentary Ba isotopes |
title_sort |
increased export production during recovery from the paleocene–eocene thermal maximum constrained by sedimentary ba isotopes |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://oceanrep.geomar.de/id/eprint/46280/ https://oceanrep.geomar.de/id/eprint/46280/1/Bridgestock.pdf https://doi.org/10.1016/j.epsl.2018.12.036 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/46280/1/Bridgestock.pdf Bridgestock, L. , Hsieh, Y. T., Porcelli, D. and Henderson, G. M. (2019) Increased export production during recovery from the Paleocene–Eocene thermal maximum constrained by sedimentary Ba isotopes. Earth and Planetary Science Letters, 510 . pp. 53-63. DOI 10.1016/j.epsl.2018.12.036 <https://doi.org/10.1016/j.epsl.2018.12.036>. doi:10.1016/j.epsl.2018.12.036 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2018.12.036 |
container_title |
Earth and Planetary Science Letters |
container_volume |
510 |
container_start_page |
53 |
op_container_end_page |
63 |
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1766207473237098496 |