Tremblin, Maxime; Hermoso, Michael; Minoletti, Fabrice (2016): Eocene-Oligocene sea surface temperature and pCO2 estimates [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.865323, Supplement to: Tremblin, M et al. (2016): Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic. Proceedings of the National Academy of Sciences, 113(42), 11782-11787, https://doi.org/10.1073/pnas.1608100113
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Abstract:
The long-term cooling trend of the Cenozoic is punctuated by shorter-term climatic events, such as the inception of permanent ice sheets on Antarctica at the Eocene-Oligocene Transition (~33.7 Ma). Taking advantage of the excellent state of preservation of coccolith calcite in equatorial Atlantic deep-sea cores, we unveil progressive tropical warming in the Atlantic Ocean initiated 4 million years prior to Antarctic glaciation. Warming preceding glaciation may appear counterintuitive, but we argue that this long-term climatic precursor to the EOT reinforced cooling of austral high latitudes via the redistribution of heat at the surface of the oceans. We discuss this new prominent paleoceanographic and climatic feature in the context of overarching pCO2 decline and the establishment of an Antarctic circumpolar current.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 4.647145 * Median Longitude: -43.551675 * South-bound Latitude: 4.204150 * West-bound Longitude: -43.740000 * North-bound Latitude: 5.976130 * East-bound Longitude: -43.488900
Date/Time Start: 1994-02-14T04:00:00 * Date/Time End: 1994-03-21T08:45:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Tremblin, M; Hermoso, M; Minoletti, F (2016): (Table S2) Coccolith carbon isotope compositions used to calculate DIC and pCO2 estimates, ODP Hole 154-925A. https://doi.org/10.1594/PANGAEA.865322
- Tremblin, M; Hermoso, M; Minoletti, F (2016): (Table S1) Oxygen isotope data (coccolith and seawater) used to determine the temperatures estimates, ODP Holes 154-925A and 154-929E. https://doi.org/10.1594/PANGAEA.865321