High tide of the warm Pliocene: implications of global sea level for Antarctic deglaciation

Miller, Kenneth G., Wright, James D., Browning, James V., Kulpecz, Andrew, Kominz, Michelle, Naish, Tim R., Cramer, Benjamin S., Rosenthal, Yair, Peltier, W. Richard and Sosdian, Sindia ORCID: https://orcid.org/0000-0002-4599-5529 2012. High tide of the warm Pliocene: implications of global sea level for Antarctic deglaciation. Geology 40 (5) , pp. 407-410. 10.1130/G32869.1

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Abstract

We obtained global sea-level (eustatic) estimates with a peak of ∼22 m higher than present for the Pliocene interval 2.7–3.2 Ma from backstripping in Virginia (United States), New Zealand, and Enewetak Atoll (north Pacific Ocean), benthic foraminiferal δ18O values, and Mg/Ca-δ18O estimates. Statistical analysis indicates that it is likely (68% confidence interval) that peak sea level was 22 ± 5 m higher than modern, and extremely likely (95%) that it was 22 ± 10 m higher than modern. Benthic foraminiferal δ18O values appear to require that the peak was <20–21 m. Our estimates imply loss of the equivalent of the Greenland and West Antarctic ice sheets, and some volume loss from the East Antarctic Ice Sheet, and address the long-standing controversy concerning the Pliocene stability of the East Antarctic Ice Sheet.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Subjects:	G Geography. Anthropology. Recreation > GC Oceanography Q Science > QE Geology
Publisher:	Geological Society of America
ISSN:	0091-7613
Last Modified:	24 Oct 2022 11:51
URI:	https://orca.cardiff.ac.uk/id/eprint/49554

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