This document summarizes a scientific study on warming in the earliest Paleogene period shown through oxygen isotope analysis of fish debris found in El Kef, Tunisia. The study found that oxygen isotope ratios from fish debris indicate the oceans warmed rapidly by 4-8 degrees Celsius within the first few thousand years after a mass extinction event at the Paleocene-Eocene boundary. This provides direct evidence of the extreme greenhouse warming that occurred during this time period. The results help constrain climate models of early Paleogene warming and provide insight into how the Earth system responds to carbon input.

1. Cite as: K. G. MacLeod et al., Science
10.1126/science.aap8525 (2018).
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7. Postimpact earliest Paleogene warming shown by fish debris oxygen isotopes (El Kef, Tunisia)
K. G. MacLeod, P. C. Quinton, J. Sepúlveda and M. H. Negra
originally published online May 24, 2018published online May 24, 2018
ARTICLE TOOLS http://science.sciencemag.org/content/early/2018/05/24/science.aap8525
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SUPPLEMENTARY http://science.sciencemag.org/content/suppl/2018/05/23/science.aap8525.DC1
REFERENCES
http://science.sciencemag.org/content/early/2018/05/24/science.aap8525#BIBL
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