Subtropical Arctic Ocean temperatures during the Palaeocene/Eocene thermal maximum

Appy Sluijs (), Stefan Schouten (), Mark Pagani, Martijn Woltering, Henk Brinkhuis, Jaap S. Sinninghe Damsté, Gerald R. Dickens, Matthew Huber, Gert-Jan Reichart, Ruediger Stein, Jens Matthiessen, Lucas J. Lourens, Nikolai Pedentchouk, Jan Backman and Kathryn Moran
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Appy Sluijs: Palaeoecology, Institute of Environmental Biology, Utrecht University
Stefan Schouten: Royal Netherlands Institute for Sea Research (NIOZ)
Mark Pagani: Yale University
Martijn Woltering: Royal Netherlands Institute for Sea Research (NIOZ)
Henk Brinkhuis: Palaeoecology, Institute of Environmental Biology, Utrecht University
Jaap S. Sinninghe Damsté: Royal Netherlands Institute for Sea Research (NIOZ)
Gerald R. Dickens: Rice University
Matthew Huber: Purdue University
Gert-Jan Reichart: Utrecht University
Ruediger Stein: Alfred-Wegener-Institute for Polar and Marine Research
Jens Matthiessen: Alfred-Wegener-Institute for Polar and Marine Research
Lucas J. Lourens: Utrecht University
Nikolai Pedentchouk: Yale University
Jan Backman: Stockholm University
Kathryn Moran: University of Rhode Island

Nature, 2006, vol. 441, issue 7093, 610-613

Abstract: The Cenozoic Arctic Ocean Little was known about the environmental history of the Arctic Ocean before the 2004 ACEX ocean drilling expedition. Now a 430-metre sea floor sediment core has been recovered and its analysis, reported this week, provides a 56-million-year climate record spanning the transition from a warm ‘greenhouse’ to a colder ‘icehouse’ world. Several key events are identified during the Cenozoic: surface waters during the Palaeocene/Eocene thermal maximum (55 million years ago) were much warmer than previous estimates; surface-water freshening confirms an intensified hydrological cycle about 49 million years ago; and the first ice-rafted debris occurred 45 million years ago, 35 million years earlier than was thought. The revised timings for the earliest Arctic cooling events coincide with those for Antarctica, supporting suggestions that global climate changed symmetrically about the poles.

Date: 2006
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DOI: 10.1038/nature04668

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