Toward a Cenozoic history of atmospheric CO2

Hönisch, Bärbel, Royer, Dana L., Breecker, Daniel O., Polissar, Pratigya J., Bowen, Gabriel J., Henehan, Michael J., Cui, Ying, Steinthorsdottir, Margret, McElwain, Jennifer C., Kohn, Matthew J., Pearson, Ann, Phelps, Samuel R., Uno, Kevin T., Ridgwell, Andy, Anagnostou, Eleni, Austermann, Jacqueline, Badger, Marcus P. S., Barclay, Richard S., Bijl, Peter K., Chalk, Thomas B., Scotese, Christopher R., de la Vega, Elwyn, DeConto, Robert M., Dyez, Kelsey A., Ferrini, Vicki, Franks, Peter J., Giulivi, Claudia F., Gutjahr, Marcus, Harper, Dustin T., Haynes, Laura L., Huber, Matthew, Snell, Kathryn E., Keisling, Benjamin A., Konrad, Wilfried, Lowenstein, Tim K., Malinverno, Alberto, Guillermic, Maxence, Mejía, Luz María, Milligan, Joseph N., Morton, John J., Nordt, Lee, Whiteford, Ross, Roth-Nebelsick, Anita, Rugenstein, Jeremy K. C., Schaller, Morgan F., Sheldon, Nathan D., Sosdian, Sindia ORCID: https://orcid.org/0000-0002-4599-5529, Wilkes, Elise B., Witkowski, Caitlyn R., Zhang, Yi Ge, Anderson, Lloyd, Beerling, David J., Bolton, Clara, Cerling, Thure E., Cotton, Jennifer M., Da, Jiawei, Ekart, Douglas D., Foster, Gavin L., Greenwood, David R., Hyland, Ethan G., Jagniecki, Elliot A., Jasper, John P., Kowalczyk, Jennifer B., Kunzmann, Lutz, Kürschner, Wolfram M., Lawrence, Charles E., Lear, Caroline H. ORCID: https://orcid.org/0000-0002-7533-4430, Martínez-Botí, Miguel A., Maxbauer, Daniel P., Montagna, Paolo, Naafs, B. David A., Rae, James W. B., Raitzsch, Markus, Retallack, Gregory J., Ring, Simon J., Seki, Osamu, Sepúlveda, Julio, Sinha, Ashish, Tesfamichael, Tekie F., Tripati, Aradhna, van der Burgh, Johan, Yu, Jimin, Zachos, James C. and Zhang, Laiming 2023. Toward a Cenozoic history of atmospheric CO2. Science 382 (6675) , eadi5177. 10.1126/science.adi5177

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Abstract

The geological record encodes the relationship between climate and atmospheric carbon dioxide (CO2) over long and short timescales, as well as potential drivers of evolutionary transitions. However, reconstructing CO2 beyond direct measurements requires the use of paleoproxies and herein lies the challenge, as proxies differ in their assumptions, degree of understanding, and even reconstructed values. In this study, we critically evaluated, categorized, and integrated available proxies to create a high-fidelity and transparently constructed atmospheric CO2 record spanning the past 66 million years. This newly constructed record provides clearer evidence for higher Earth system sensitivity in the past and for the role of CO2 thresholds in biological and cryosphere evolution.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Publisher:	American Association for the Advancement of Science
ISSN:	0036-8075
Date of First Compliant Deposit:	18 December 2023
Date of Acceptance:	30 October 2023
Last Modified:	11 Nov 2024 22:45
URI:	https://orca.cardiff.ac.uk/id/eprint/164921

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