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Continental warming preceding the Palaeocene–Eocene thermal maximum

Ross Secord (), Philip D. Gingerich, Kyger C. Lohmann and Kenneth G. MacLeod
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Ross Secord: University of Nebraska
Philip D. Gingerich: University of Michigan
Kyger C. Lohmann: University of Michigan
Kenneth G. MacLeod: University of Missouri

Nature, 2010, vol. 467, issue 7318, 955-958

Abstract: Two sources of warming for PETM event The Palaeocene–Eocene thermal maximum (PETM) is a well-known abrupt warming that occurred about 55.8 million years ago and is usually thought to have been caused by a large release of greenhouse gases, probably from methane hydrates, as recorded in a large carbon isotope excursion. Ross Secord and colleagues have used isotopic analysis of mammal teeth from the Bighorn Basin, Wyoming, to show that continental warming of about 5 °C preceded the isotopic excursion. The PETM therefore seems to have been caused by at least two separate warming events, each forced by different processes.

Date: 2010
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DOI: 10.1038/nature09441

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