Sedimentary response to Paleocene-Eocene thermal maximum carbon release: A model-data comparison

K. Panchuk, A. Ridgwell, L. R. Kump

Research output: Contribution to journalArticlepeer-review

163 Scopus citations

Abstract

Possible sources of carbon that may have caused global warming at the Paleocene-Eocene boundary are constrained using an intermediate complexity Earth-system model configured with early Eocene paleogeography. We find that 6800 Pg C (δ13C of -22‰) is the smallest pulse modeled here to reasonably reproduce observations of the extent of seaffoor CaCO3 dissolution. This pulse could not have been solely the result of methane hydrate destabilization, suggesting that additional sources of CO2 such as volcanic CO2, the oxidation of sedimentary organic carbon, or thermogenic methane must also have contributed. Observed contrasts in dissolution intensity between Atlantic and Pacific sites are reproduced in the model by reducing bioturbation in the Atlantic during the event, simulating a potential consequence of the spread of low-oxygen bottom waters.

Original languageEnglish (US)
Pages (from-to)315-318
Number of pages4
JournalGeology
Volume36
Issue number4
DOIs
StatePublished - Apr 2008

All Science Journal Classification (ASJC) codes

  • Geology

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