Onset of carbon isotope excursion at the Paleocene - Eocene thermal maximum took millennia, not 13 years. (skepticalscience.com)
The cause of the Paleocene - Eocene thermal maximum carbon isotope excursion remains speculative, primarily due to uncertainties in the timing and duration of the Paleocene - Eocene thermal maximum. (pubs.geoscienceworld.org)
Development of a novel empirical framework for interpreting geological carbon isotope excursions, with implications for the rate of carbon injection across the PETM. (skepticalscience.com)