dc.contributor.author | Brown, Rachel M. | |
dc.contributor.author | Chalk, Tom | |
dc.contributor.author | Crocker, Anya J. | |
dc.contributor.author | Wilson, Paul A. | |
dc.contributor.author | Foster, Gavin L. | |
dc.date.accessioned | 2023-05-16T07:56:44Z | |
dc.date.available | 2023-05-16T07:56:44Z | |
dc.date.issued | 2022-07-25 | |
dc.description.abstract | Earth’s climate cooled markedly during the late Miocene from 12 to 5 million years ago, with far-reaching consequences for
global ecosystems. However, the driving forces of these changes remain controversial. A major obstacle to progress is the
uncertainty over the role played by greenhouse gas radiative forcing. Here we present boron isotope compositions for planktic
foraminifera, which record carbon dioxide change for the interval of most rapid cooling, the late Miocene cooling event between
7 and 5 Ma. Our record suggests that CO<sub>2</sub> declined by some 100 ppm over this two-million-year-long interval to a minimum at
approximately 5.9 Ma. Having accounted for non-CO<sub>2</sub> greenhouse gasses and slow climate feedbacks, we estimate global mean
surface temperature change for a doubling of CO<sub>2</sub>—equilibrium climate sensitivity—to be 3.9 °C (1.8–6.7 °C at 95% confidence)
on the basis of comparison of our record of radiative forcing from CO<sub>2</sub> with a record of global mean surface temperature change.
We conclude that changes in CO<sub>2</sub> and climate were closely coupled during the latest Miocene and that equilibrium climate sensitivity was within range of estimates for the late Pleistocene, other intervals of the Cenozoic and the twenty-first century as
presented by the Intergovernmental Panel on Climate Change. | en_US |
dc.identifier.citation | Brown RM, Chalk TB, Crocker, Wilson PA, Foster GL. Late Miocene cooling coupled to carbon dioxide with Pleistocene-like climate sensitivity. Nature Geoscience. 2022;15(8):664-670 | en_US |
dc.identifier.cristinID | FRIDAID 2041390 | |
dc.identifier.doi | 10.1038/s41561-022-00982-7 | |
dc.identifier.issn | 1752-0894 | |
dc.identifier.issn | 1752-0908 | |
dc.identifier.uri | https://hdl.handle.net/10037/29226 | |
dc.language.iso | eng | en_US |
dc.publisher | Nature | en_US |
dc.relation.journal | Nature Geoscience | |
dc.rights.accessRights | openAccess | en_US |
dc.rights.holder | Copyright 2022 The Author(s) | en_US |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0 | en_US |
dc.rights | Attribution 4.0 International (CC BY 4.0) | en_US |
dc.title | Late Miocene cooling coupled to carbon dioxide with Pleistocene-like climate sensitivity | en_US |
dc.type.version | acceptedVersion | en_US |
dc.type | Journal article | en_US |
dc.type | Tidsskriftartikkel | en_US |
dc.type | Peer reviewed | en_US |