Articles | Volume 16, issue 5
Clim. Past, 16, 1667–1689, 2020
https://doi.org/10.5194/cp-16-1667-2020
Clim. Past, 16, 1667–1689, 2020
https://doi.org/10.5194/cp-16-1667-2020

Research article 01 Sep 2020

Research article | 01 Sep 2020

Surface-circulation change in the southwest Pacific Ocean across the Middle Eocene Climatic Optimum: inferences from dinoflagellate cysts and biomarker paleothermometry

Margot J. Cramwinckel et al.

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Latest update: 04 Dec 2021
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Short summary
Phases of past transient warming can be used as a test bed to study the environmental response to climate change independent of tectonic change. Using fossil plankton and organic molecules, here we reconstruct surface ocean temperature and circulation in and around the Tasman Gateway during a warming phase 40 million years ago termed the Middle Eocene Climatic Optimum. We find that plankton assemblages track ocean circulation patterns, with superimposed variability being related to temperature.