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Carbon cycle: Global warming then and now

A rapid warming event 55.8 million years ago was caused by extensive carbon emissions. The rate of change of carbon and oxygen isotopes in marine shelf sediments suggests that carbon emission rates were much slower than anthropogenic emissions.

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Affiliations

  1. Peter Stassen is in the Department of Earth and Environmental Sciences of the KU Leuven, Leuven B-3000, Belgium

    • Peter Stassen

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Correspondence to Peter Stassen.