Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/14348
Authors: Westerhold, Thomas* 
Marwan, Norbert* 
Drury, Anna Joy* 
Liebrand, Diederik* 
Agnini, Claudia* 
Anagnostou, Eleni* 
Barnet, James S K* 
Bohaty, Steven M* 
De Vleeschouwer, David* 
Florindo, Fabio* 
Frederichs, Thomas* 
Hodell, David* 
Holbourn, Ann* 
Kroon, Dick* 
Lauretano, Vittoria* 
Littler, Kate* 
Lourens, Lucas* 
Lyle, Mitchell* 
Pälike, Heiko* 
Röhl, Ursula* 
Tian, Jun* 
Wilkens, Roy H* 
Wilson, Paul A* 
Zachos, James C* 
Title: An astronomically dated record of Earth's climate and its predictability over the last 66 million years
Journal: Science (New York, N.Y.) 
Series/Report no.: /369 (2020)
Publisher: AAAS
Issue Date: 11-Sep-2020
DOI: 10.1126/science.aba6853
Abstract: Much of our understanding of Earth's past climate comes from the measurement of oxygen and carbon isotope variations in deep-sea benthic foraminifera. Yet, long intervals in existing records lack the temporal resolution and age control needed to thoroughly categorize climate states of the Cenozoic era and to study their dynamics. Here, we present a new, highly resolved, astronomically dated, continuous composite of benthic foraminifer isotope records developed in our laboratories. Four climate states-Hothouse, Warmhouse, Coolhouse, Icehouse-are identified on the basis of their distinctive response to astronomical forcing depending on greenhouse gas concentrations and polar ice sheet volume. Statistical analysis of the nonlinear behavior encoded in our record reveals the key role that polar ice volume plays in the predictability of Cenozoic climate dynamics.
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