Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event
The Miocene Climatic Optimum (MCO, 14–17 Ma) was ~3–4 °C warmer than present, similar to estimates for 2100. Coincident with the MCO is the Monterey positive carbon isotope (δ13C) excursion, with oceans more depleted in 12C relative to 13C than any time in the past 50 Myrs. The long-standing Montere...
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:127680 2023-06-11T04:04:33+02:00 Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event Sosdian, S. M. Babila, T. L. Greenop, R. Foster, G. L. Lear, C. H. 2020-01-09 application/pdf https://orca.cardiff.ac.uk/id/eprint/127680/ https://doi.org/10.1038/s41467-019-13792-0 https://orca.cardiff.ac.uk/id/eprint/127680/3/s41467-019-13792-0.pdf en eng Nature Research https://orca.cardiff.ac.uk/id/eprint/127680/3/s41467-019-13792-0.pdf Sosdian, S. M. https://orca.cardiff.ac.uk/view/cardiffauthors/A185665E.html orcid:0000-0002-4599-5529 orcid:0000-0002-4599-5529, Babila, T. L., Greenop, R., Foster, G. L. and Lear, C. H. https://orca.cardiff.ac.uk/view/cardiffauthors/A048848V.html orcid:0000-0002-7533-4430 orcid:0000-0002-7533-4430 2020. Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event. Nature Communications 11 , 134. 10.1038/s41467-019-13792-0 https://doi.org/10.1038/s41467-019-13792-0 file https://orca.cardiff.ac.uk/id/eprint/127680/3/s41467-019-13792-0.pdf doi:10.1038/s41467-019-13792-0 cc_by Article PeerReviewed 2020 ftunivcardiff https://doi.org/10.1038/s41467-019-13792-0 2023-05-04T22:36:12Z The Miocene Climatic Optimum (MCO, 14–17 Ma) was ~3–4 °C warmer than present, similar to estimates for 2100. Coincident with the MCO is the Monterey positive carbon isotope (δ13C) excursion, with oceans more depleted in 12C relative to 13C than any time in the past 50 Myrs. The long-standing Monterey Hypothesis uses this excursion to invoke massive marine organic carbon burial and draw-down of atmospheric CO2 as a cause for the subsequent Miocene Climate Transition and Antarctic glaciation. However, this hypothesis cannot explain the multi-Myr lag between the δ13C excursion and global cooling. We use planktic foraminiferal B/Ca, δ11B, δ13C, and Mg/Ca to reconstruct surface ocean carbonate chemistry and temperature. We propose that the MCO was associated with elevated oceanic dissolved inorganic carbon caused by volcanic degassing, global warming, and sea-level rise. A key negative feedback of this warm climate was the organic carbon burial on drowned continental shelves. Article in Journal/Newspaper Antarc* Antarctic Cardiff University: ORCA (Online Research @ Cardiff) Antarctic Nature Communications 11 1 |
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The Miocene Climatic Optimum (MCO, 14–17 Ma) was ~3–4 °C warmer than present, similar to estimates for 2100. Coincident with the MCO is the Monterey positive carbon isotope (δ13C) excursion, with oceans more depleted in 12C relative to 13C than any time in the past 50 Myrs. The long-standing Monterey Hypothesis uses this excursion to invoke massive marine organic carbon burial and draw-down of atmospheric CO2 as a cause for the subsequent Miocene Climate Transition and Antarctic glaciation. However, this hypothesis cannot explain the multi-Myr lag between the δ13C excursion and global cooling. We use planktic foraminiferal B/Ca, δ11B, δ13C, and Mg/Ca to reconstruct surface ocean carbonate chemistry and temperature. We propose that the MCO was associated with elevated oceanic dissolved inorganic carbon caused by volcanic degassing, global warming, and sea-level rise. A key negative feedback of this warm climate was the organic carbon burial on drowned continental shelves. |
format |
Article in Journal/Newspaper |
author |
Sosdian, S. M. Babila, T. L. Greenop, R. Foster, G. L. Lear, C. H. |
spellingShingle |
Sosdian, S. M. Babila, T. L. Greenop, R. Foster, G. L. Lear, C. H. Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event |
author_facet |
Sosdian, S. M. Babila, T. L. Greenop, R. Foster, G. L. Lear, C. H. |
author_sort |
Sosdian, S. M. |
title |
Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event |
title_short |
Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event |
title_full |
Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event |
title_fullStr |
Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event |
title_full_unstemmed |
Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event |
title_sort |
ocean carbon storage across the middle miocene: a new interpretation for the monterey event |
publisher |
Nature Research |
publishDate |
2020 |
url |
https://orca.cardiff.ac.uk/id/eprint/127680/ https://doi.org/10.1038/s41467-019-13792-0 https://orca.cardiff.ac.uk/id/eprint/127680/3/s41467-019-13792-0.pdf |
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Antarctic |
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Antarctic |
genre |
Antarc* Antarctic |
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Antarc* Antarctic |
op_relation |
https://orca.cardiff.ac.uk/id/eprint/127680/3/s41467-019-13792-0.pdf Sosdian, S. M. https://orca.cardiff.ac.uk/view/cardiffauthors/A185665E.html orcid:0000-0002-4599-5529 orcid:0000-0002-4599-5529, Babila, T. L., Greenop, R., Foster, G. L. and Lear, C. H. https://orca.cardiff.ac.uk/view/cardiffauthors/A048848V.html orcid:0000-0002-7533-4430 orcid:0000-0002-7533-4430 2020. Ocean carbon storage across the middle Miocene: A new interpretation for the Monterey Event. Nature Communications 11 , 134. 10.1038/s41467-019-13792-0 https://doi.org/10.1038/s41467-019-13792-0 file https://orca.cardiff.ac.uk/id/eprint/127680/3/s41467-019-13792-0.pdf doi:10.1038/s41467-019-13792-0 |
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cc_by |
op_doi |
https://doi.org/10.1038/s41467-019-13792-0 |
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Nature Communications |
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11 |
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1 |
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