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Multi-proxy evidence for sea level fall at the onset of the Eocene-Oligocene transition

Continental-scale expansion of the East Antarctic Ice Sheet during the Eocene-Oligocene Transition (EOT) is one of the largest non-linear events in Earth’s climate history. Declining atmospheric carbon dioxide concentrations and orbital variability triggered glacial expansion and strong feedbacks in...

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Autores principales: De Lira Mota, Marcelo A., Dunkley Jones, Tom, Sulaiman, Nursufiah, Edgar, Kirsty M., Yamaguchi, Tatsuhiko, Leng, Melanie J., Adloff, Markus, Greene, Sarah E., Norris, Richard, Warren, Bridget, Duffy, Grace, Farrant, Jennifer, Murayama, Masafumi, Hall, Jonathan, Bendle, James
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10409788/
https://www.ncbi.nlm.nih.gov/pubmed/37553323
http://dx.doi.org/10.1038/s41467-023-39806-6
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author De Lira Mota, Marcelo A.
Dunkley Jones, Tom
Sulaiman, Nursufiah
Edgar, Kirsty M.
Yamaguchi, Tatsuhiko
Leng, Melanie J.
Adloff, Markus
Greene, Sarah E.
Norris, Richard
Warren, Bridget
Duffy, Grace
Farrant, Jennifer
Murayama, Masafumi
Hall, Jonathan
Bendle, James
author_facet De Lira Mota, Marcelo A.
Dunkley Jones, Tom
Sulaiman, Nursufiah
Edgar, Kirsty M.
Yamaguchi, Tatsuhiko
Leng, Melanie J.
Adloff, Markus
Greene, Sarah E.
Norris, Richard
Warren, Bridget
Duffy, Grace
Farrant, Jennifer
Murayama, Masafumi
Hall, Jonathan
Bendle, James
author_sort De Lira Mota, Marcelo A.
collection PubMed
description Continental-scale expansion of the East Antarctic Ice Sheet during the Eocene-Oligocene Transition (EOT) is one of the largest non-linear events in Earth’s climate history. Declining atmospheric carbon dioxide concentrations and orbital variability triggered glacial expansion and strong feedbacks in the climate system. Prominent among these feedbacks was the repartitioning of biogeochemical cycles between the continental shelves and the deep ocean with falling sea level. Here we present multiple proxies from a shallow shelf location that identify a marked regression and an elevated flux of continental-derived organic matter at the earliest stage of the EOT, a time of deep ocean carbonate dissolution and the extinction of oligotrophic phytoplankton groups. We link these observations using an Earth System model, whereby this first regression delivers a pulse of organic carbon to the oceans that could drive the observed patterns of deep ocean dissolution and acts as a transient negative feedback to climate cooling.
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spelling pubmed-104097882023-08-10 Multi-proxy evidence for sea level fall at the onset of the Eocene-Oligocene transition De Lira Mota, Marcelo A. Dunkley Jones, Tom Sulaiman, Nursufiah Edgar, Kirsty M. Yamaguchi, Tatsuhiko Leng, Melanie J. Adloff, Markus Greene, Sarah E. Norris, Richard Warren, Bridget Duffy, Grace Farrant, Jennifer Murayama, Masafumi Hall, Jonathan Bendle, James Nat Commun Article Continental-scale expansion of the East Antarctic Ice Sheet during the Eocene-Oligocene Transition (EOT) is one of the largest non-linear events in Earth’s climate history. Declining atmospheric carbon dioxide concentrations and orbital variability triggered glacial expansion and strong feedbacks in the climate system. Prominent among these feedbacks was the repartitioning of biogeochemical cycles between the continental shelves and the deep ocean with falling sea level. Here we present multiple proxies from a shallow shelf location that identify a marked regression and an elevated flux of continental-derived organic matter at the earliest stage of the EOT, a time of deep ocean carbonate dissolution and the extinction of oligotrophic phytoplankton groups. We link these observations using an Earth System model, whereby this first regression delivers a pulse of organic carbon to the oceans that could drive the observed patterns of deep ocean dissolution and acts as a transient negative feedback to climate cooling. Nature Publishing Group UK 2023-08-08 /pmc/articles/PMC10409788/ /pubmed/37553323 http://dx.doi.org/10.1038/s41467-023-39806-6 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
De Lira Mota, Marcelo A.
Dunkley Jones, Tom
Sulaiman, Nursufiah
Edgar, Kirsty M.
Yamaguchi, Tatsuhiko
Leng, Melanie J.
Adloff, Markus
Greene, Sarah E.
Norris, Richard
Warren, Bridget
Duffy, Grace
Farrant, Jennifer
Murayama, Masafumi
Hall, Jonathan
Bendle, James
Multi-proxy evidence for sea level fall at the onset of the Eocene-Oligocene transition
title Multi-proxy evidence for sea level fall at the onset of the Eocene-Oligocene transition
title_full Multi-proxy evidence for sea level fall at the onset of the Eocene-Oligocene transition
title_fullStr Multi-proxy evidence for sea level fall at the onset of the Eocene-Oligocene transition
title_full_unstemmed Multi-proxy evidence for sea level fall at the onset of the Eocene-Oligocene transition
title_short Multi-proxy evidence for sea level fall at the onset of the Eocene-Oligocene transition
title_sort multi-proxy evidence for sea level fall at the onset of the eocene-oligocene transition
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10409788/
https://www.ncbi.nlm.nih.gov/pubmed/37553323
http://dx.doi.org/10.1038/s41467-023-39806-6
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