Articles | Volume 16, issue 2
Clim. Past, 16, 555–573, 2020
https://doi.org/10.5194/cp-16-555-2020
Clim. Past, 16, 555–573, 2020
https://doi.org/10.5194/cp-16-555-2020

Research article 19 Mar 2020

Research article | 19 Mar 2020

Changes in the high-latitude Southern Hemisphere through the Eocene–Oligocene transition: a model–data comparison

Alan T. Kennedy-Asser et al.

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Cited articles

Baatsen, M., von der Heydt, A. S., Huber, M., Kliphuis, M. A., Bijl, P. K., Sluijs, A., and Dijkstra, H. A.: Equilibrium state and sensitivity of the simulated middle-to-late Eocene climate, Clim. Past Discuss., https://doi.org/10.5194/cp-2018-43, 2018. 
Bohaty, S. M., Zachos, J. C., and Delaney, M. L.: Foraminiferal Mg∕Ca evidence for Southern Ocean cooling across the Eocene-Oligocene transition, Earth Planet. Sc. Lett., 317–318, 251–261, https://doi.org/10.1016/j.epsl.2011.11.037, 2012. 
Carter, A., Riley, T. R., Hillenbrand, C. D., and Rittner, M.: Widespread Antarctic glaciation during the Late Eocene, Earth Planet. Sc. Lett., 458, 49–57, https://doi.org/10.1016/j.epsl.2016.10.045, 2017. 
Coxall, H. K. and Pearson, P. N.: The Eocene-Oligocene transition, in: Deep time perspectives on climate change: Marrying the signal from computer models and biological proxies, edited by: Williams, M., Hayward, A., Gregory, J., and Schmidt, D. N., Geological Society Publishing House, London, 351–387, 2007. 
Coxall, H. K., Wilson, P. A., Pälike, H., Lear, C. H., and Backman, J.: Rapid stepwise onset of Antarctic glaciation and deeper calcite compensation in the Pacific Ocean, Nature, 433, 53–57, https://doi.org/10.1038/nature03135, 2005. 
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Global cooling and a major expansion of ice over Antarctica occurred ~ 34 million years ago at the Eocene–Oligocene transition (EOT). A large secondary proxy dataset for high-latitude Southern Hemisphere temperature before, after and across the EOT is compiled and compared to simulations from two coupled climate models. Although there are inconsistencies between the models and data, the comparison shows amongst other things that changes in the Drake Passage were unlikely the cause of the EOT.