Archaeal lipid biomarker constraints on the Paleocene-Eocene carbon isotope excursion

Archaeal lipid biomarker constraints on the Paleocene-Eocene carbon isotope excursion

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The Paleocene-Eocene Thermal Maximum (c.55 million years ago) was a period associated with massive carbon injection into the atmosphere, yet discrepancies cookie cutter shark plush in carbon isotope proxy records have led to substantial uncertainties in the source, scale, and timing of carbon emissions.Here, the hiboost 4k smart link authors propose that membrane lipids of marine planktonic archaea can reliably record the carbon isotope excursion and surface ocean warming, giving a new constraint for the source and size of the PETM carbon emissions.