Articles | Volume 19, issue 1
Research article
13 Jan 2023
Research article |  | 13 Jan 2023

Sea surface temperature evolution of the North Atlantic Ocean across the Eocene–Oligocene transition

Kasia K. Śliwińska, Helen K. Coxall, David K. Hutchinson, Diederik Liebrand, Stefan Schouten, and Agatha M. de Boer

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Cited articles

Abels, H. A., Dupont-Nivet, G., Xiao, G., Bosboom, R., and Krijgsman, W.: Step-wise change of Asian interior climate preceding the Eocene-Oligocene Transition (EOT), Palaeogeogr. Palaeocl., 299, 399–412,, 2011. 
Anagnostou, E., John, E. H., Edgar, K. M., Foster, G. L., Ridgwell, A., Inglis, G. N., Pancost, R. D., Lunt, D. J., and Pearson, P. N.: Changing atmospheric CO2 concentration was the primary driver of early Cenozoic climate, Nature, 533, 380–384,, 2016. 
Arthur, M. A., Srivastava, S. P., Kaminski, M., Jarrard, R., and Osler, J.: Seismic Stratigraphy and History of Deep Circulation and Sediment Drift Development in Baffin Bay and the Labrador Sea, in: Proceedings of the Ocean Drilling Program, 105 Scientific Results, 957–988,, 1989. 
Baatsen, M., von der Heydt, A. S., Huber, M., Kliphuis, M. A., Bijl, P. K., Sluijs, A., and Dijkstra, H. A.: The middle to late Eocene greenhouse climate modelled using the CESM 1.0.5, Clim. Past, 16, 2573–2597,, 2020. 
Bernard, T., Steer, P., Gallagher, K., Szulc, A., Whitham, A., and Johnson, C.: Evidence for Eocene-Oligocene glaciation in the landscape of the East Greenland margin, Geology, 44, 895–898,, 2016. 
Short summary
We provide a sea surface temperature record from the Labrador Sea (ODP Site 647) based on organic geochemical proxies across the late Eocene and early Oligocene. Our study reveals heterogenic cooling of the Atlantic. The cooling of the North Atlantic is difficult to reconcile with the active Atlantic Meridional Overturning Circulation (AMOC). We discuss possible explanations like uncertainty in the data, paleogeography and atmospheric CO2 boundary conditions, model weaknesses, and AMOC activity.