Journal article
Surface-circulation change in the southwest Pacific Ocean across the Middle Eocene Climatic Optimum: Inferences from dinoflagellate cysts and biomarker paleothermometry
MJ Cramwinckel, L Woelders, EP Huurdeman, F Peterse, SJ Gallagher, J Pross, CE Burgess, GJ Reichart, A Sluijs, PK Bijl
Climate of the Past | COPERNICUS GESELLSCHAFT MBH | Published : 2020
Abstract
Global climate cooled from the early Eocene hothouse ( ∼ 52–50 Ma) to the latest Eocene (∼ 34 Ma). At the same time, the tectonic evolution of the Southern Ocean was characterized by the opening and deepening of circum- Antarctic gateways, which affected both surface- and deepocean circulation. The Tasmanian Gateway played a key role in regulating ocean throughflow between Australia and Antarctica. Southern Ocean surface currents through and around the Tasmanian Gateway have left recognizable tracers in the spatiotemporal distribution of plankton fossils, including organic-walled dinoflagellate cysts. This spatiotemporal distribution depends on both the physicochemical properties of the wate..
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Awarded by Netherlands Earth System Science Centre
Funding Acknowledgements
This work was carried out under the program of the Netherlands Earth System Science Centre (NESSC), financially supported by the Dutch Ministry of Education, Culture and Science. Margot J. Cramwinckel and Appy Sluijs thank the Ammodo Foundation for funding unfettered research of laureate Appy Sluijs. This study was made possible by the Netherlands Organisation for Scientific Research (NWO) (grant no. 834.11.006), which enabled the purchase of the UHPLC-MS system used for GDGT analyses. Funding was provided by the Australian IODP office and the ARC Basins Genesis Hub (IH130200012) to Stephen J. Gallagher.