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Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary

Naish, Tim; Woolfe, K J; Barrett, Peter; Wilson, G.S; Atkins, Cliff; Bohaty, S.M; Bucker, Christian; Claps, Michele; Davey, Fred; Dunbar, Gavin; Dunn, Alistair; Fielding, C.; Florindo, Fabio; Hannah, M.J; Harnwood, D; Henrys, Stuart; Krissek, Lawrence; Lavelle, Mark; van der Meer , Jaap; Mcintosh, William; Niessen, Frank; Passchier, Sandra; Powell, Ross; Roberts, Andrew; Sagnotti, Leonardo; Scherer, R; Strong, C.P; Talarico, F; Verosub, Kenneth; Villa, Giuliana; Watkins, David; Webb, P-N; Wonik, Thomas

Description

Between 34 and 15 million years (Myr) ago, when planetary temperatures were 3-4°C warmer than at present and atmospheric CO2 concentrations were twice as high as today, the Antarctic ice sheets may have been unstable. Oxygen isotope records from deep-sea sediment cores suggest that during this time fluctuations in global temperatures and high-latitude continental ice volumes were influenced by orbital cycles. But it has hitherto not been possible to calibrate the inferred changes in ice volume...[Show more]

CollectionsANU Research Publications
Date published: 2001
Type: Journal article
URI: http://hdl.handle.net/1885/98911
Source: Nature
DOI: 10.1038/35099534

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