Abrupt reversal in ocean overturning during the Palaeocene/Eocene warm period

Flavia Nunes () and Richard D. Norris
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Flavia Nunes: University of California, San Diego
Richard D. Norris: University of California, San Diego

Nature, 2006, vol. 439, issue 7072, 60-63

Abstract: Oceans and global warming A global warming event that took place 55 million years ago at the end of the Palaeocene epoch is providing a picture of how Earth responds to climate change. The rapid rise in temperature was accompanied by turnovers in marine and terrestrial biota and changes in ocean chemistry and circulation. A study of carbon isotope records reveals a switch in the location of deep-water formation from the Southern Hemisphere to the Northern Hemisphere that was established within a few thousand years, but may have lasted for at least 40,000 years. This shows how greenhouse conditions can trigger quite rapid changes in deep ocean circulation that take much longer to be reversed.

Date: 2006
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DOI: 10.1038/nature04386

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