Recognition of Early Eocene global carbon isotope excursions using lipids of marine Thaumarchaeota
- Schoon, P.L.
- Heilmann-Clausen, C.
- Pagh Schultz, B.
- Sluijs, A.
- Sinninghe Damsté, J.S.
- Schouten, S.
DOIAbstract
The Paleocene–Eocene Thermal Maximum (PETM; ∼56 Ma) and Eocene Thermal Maximum 2 (ETM2; ∼53 Ma) are geological short (<200,000 years) episodes of extreme global warming and environmental change. Both the PETM and ETM2 are associated with the injection of 13C-depleted carbon into the ocean–atmosphere system as revealed through a globally recognized carbon isotope excursion (CIE) and massive dissolution of deep sea carbonate. However, the magnitude of these CIEs vary with the type of fossil matter, i.e. multiple carbonate phases, bulk organic matter, and terrestrial and marine biomarker lipids, making it difficult to constrain the actual CIE in atmospheric and oceanic carbon pools. Here we analyzed the stable carbon isotopic composition (δ13C...
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