Articles | Volume 20, issue 3
Research article
13 Mar 2024
Research article |  | 13 Mar 2024

CO2-driven and orbitally driven oxygen isotope variability in the Early Eocene

Julia Campbell, Christopher J. Poulsen, Jiang Zhu, Jessica E. Tierney, and Jeremy Keeler

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Cited articles

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Bataille, C., Watford, D., Ruegg, S., Lowe, A., and Bowen, G.: Chemostratigraphic age model for the Tornillo Group: A possible link between fluvial stratigraphy and climate, Palaeogeogr. Palaeocl., 457, 277–289,, 2016. 
Berger, A.: Milankovitch theory and climate, Rev. Geophys., 26, 624–657,, 1988. 
Bowen, G., Maibauer, B., Kraus, M., Rohl, U., Westerhold, T., Steimke, A., Gingerich, P., Wing, S., and Clyde, W.: Two massive, rapid released of carbon during the onset of the Paleocene–Eocene thermal maximum, Nat. Geosci., 8, 44–47,, 2014. 
Short summary
In this study, we use climate modeling to investigate the relative impact of CO2 and orbit on Early Eocene (~ 55 million years ago) climate and compare our modeled results to fossil records to determine the context for the Paleocene–Eocene Thermal Maximum, the most extreme hyperthermal in the Cenozoic. Our conclusions consider limitations and illustrate the importance of climate models when interpreting paleoclimate records in times of extreme warmth.