The seawater carbon inventory at the Paleocene–Eocene Thermal Maximum
نویسندگان
چکیده
منابع مشابه
Rapid and sustained surface ocean acidification during the PaleoceneEocene Thermal Maximum
The Paleocene-Eocene Thermal Maximum (PETM) has been associated with the release of several thousands of petagrams of carbon (PgC) as methane and/or carbon dioxide into the ocean-atmosphere system within ~10 kyr, on the basis of the co-occurrence of a carbon isotope excursion (CIE), widespread dissolution of deep sea carbonates, and global warming. In theory, this rapid carbon release should ha...
متن کاملEvidence for a rapid release of carbon at the Paleocene-Eocene thermal maximum.
The Paleocene/Eocene thermal maximum (PETM) and associated carbon isotope excursion (CIE) are often touted as the best geologic analog for the current anthropogenic rise in pCO2. However, a causal mechanism for the PETM CIE remains unidentified because of large uncertainties in the duration of the CIE's onset. Here, we report on a sequence of rhythmic sedimentary couplets comprising the Paleoce...
متن کاملOnset of carbon isotope excursion at the Paleocene-Eocene thermal maximum took millennia, not 13 years.
The Paleocene-Eocene thermal maximum (PETM) may represent the best paleo-analog for rapid and massive carbon release to the ocean and atmosphere. Thus, constraining the carbon release rate at its onset is critical. Wright and Schaller (1) use records from apparently rhythmically layered shelf sediments to argue that the layering is annual and that the onset of the carbon isotope excursion (CIE,...
متن کاملMagnitude of the carbon isotope excursion at the Paleocene–Eocene thermal maximum: The role of plant community change
Carbon-isotope measurements (δC) of leaf-wax n-alkanes from the Paleocene–Eocene Thermal Maximum (PETM) in the Bighorn Basin, Wyoming, reveal a negative carbon isotope excursion (CIE) of 4–5‰, which is 1–2‰ larger than that observed in marine carbonate δC records. Reconciling these records requires either that marine carbonates fail to record the full magnitude of the CIE or that the CIE in pla...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2020
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.2003197117