Rapid Acidification of the Ocean During the Paleocene-Eocene Thermal Maximum

  title={Rapid Acidification of the Ocean During the Paleocene-Eocene Thermal Maximum},
  author={J. Zachos and U. R{\"o}hl and S. Schellenberg and A. Sluijs and D. Hodell and D. Kelly and Ellen Thomas and M. Nicolo and I. Raffi and L. Lourens and Heather K McCarren and D. Kroon},
  pages={1611 - 1615}
The Paleocene-Eocene thermal maximum (PETM) has been attributed to the rapid release of ∼2000 × 109 metric tons of carbon in the form of methane. In theory, oxidation and ocean absorption of this carbon should have lowered deep-sea pH, thereby triggering a rapid (<10,000-year) shoaling of the calcite compensation depth (CCD), followed by gradual recovery. Here we present geochemical data from five new South Atlantic deep-sea sections that constrain the timing and extent of massive sea-floor… Expand
Rapid and sustained surface ocean acidification during the Paleocene-Eocene Thermal Maximum
The Paleocene-Eocene Thermal Maximum (PETM) has been associated with the release of several thousands of petagrams of carbon (Pg C) as methane and/or carbon dioxide into the ocean-atmosphere systemExpand
Paleocene-Eocene Thermal Maximum and the Opening of the Northeast Atlantic
The Paleocene-Eocene thermal maximum (PETM) has been attributed to a sudden release of carbon dioxide and/or methane. 40Ar/39Ar age determinations show that the Danish Ash-17 deposit, which overliesExpand
The seawater carbon inventory at the Paleocene–Eocene Thermal Maximum
  • L. Haynes, B. Hönisch
  • Environmental Science, Medicine
  • Proceedings of the National Academy of Sciences
  • 2020
The reconstruction invokes volcanic emissions as a driver of PETM warming and suggests that the buffering capacity of the ocean increased, which helped to remove carbon dioxide from the atmosphere, but estimates confirm that modern CO2 release is occurring much faster than PETM carbon release. Expand
The Paleocene‐Eocene Thermal Maximum: How much carbon is enough?
The Paleocene-Eocene Thermal Maximum (PETM), ∼55.53 million years before present, was an abrupt warming event that involved profound changes in the carbon cycle and led to major perturbations ofExpand
On the duration of the Paleocene-Eocene thermal maximum (PETM)
[1] The Paleocene-Eocene thermal maximum (PETM) is one of the best known examples of a transient climate perturbation, associated with a brief, but intense, interval of global warming and a massiveExpand
Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum
Abstract The Paleocene-Eocene Thermal Maximum (PETM) was a geologically rapid and transient warming event that occurred ca. 56 million years ago (Ma). It was associated with a pronounced negativeExpand
What caused the long duration of the Paleocene-Eocene Thermal Maximum?
  • R. Zeebe
  • Environmental Science, Geology
  • 2013
[1] Paleorecords show that the Paleocene-Eocene Thermal Maximum (PETM, � 56 Ma) was associated with a large carbon cycle anomaly and global warming >5 K, which persisted for at least 50 kyr.Expand
Beyond methane: Towards a theory for the Paleocene-Eocene Thermal Maximum
Abstract Extreme global warmth and an abrupt negative carbon isotope excursion during the Paleocene–Eocene Thermal Maximum (PETM) have been attributed to a massive release of methane hydrate fromExpand
Productivity feedback did not terminate the Paleocene-Eocene Thermal Maximum (PETM)
Abstract. The Paleocene-Eocene Thermal Maximum (PETM) occurred approximately 55 million years ago, and is one of the most dramatic abrupt global warming events in the geological record. This warmingExpand
Reversed deep-sea carbonate ion basin gradient during Paleocene-Eocene thermal maximum
[1] The Paleocene-Eocene thermal maximum (PETM, ∼55 Ma ago) was marked by widespread CaCO3 dissolution in deep-sea sediments, a process that has been attributed to massive release of carbon into theExpand


Methane oxidation during the late Palaeocene thermal maximum
Carbon isotope records across the Latest Palaeocene Thermal Maximum (LPTM) display by a remarkable delta 13 C excursion of at least -2.5 per mil that occurred within 10X10 3 yrs. Thermal dissociationExpand
Dissociation of oceanic methane hydrate as a cause of the carbon isotope excursion at the end of the Paleocene
Isotopic records across the “Latest Paleocene Thermal Maximum“ (LPTM) indicate that bottom water temperature increased by more than 4°C during a brief time interval (<104 years) of the latestExpand
A humid climate state during the Palaeocene/Eocene thermal maximum
The authors' results provide evidence for a previously unrecognized discrete shift in the state of the climate system during the PETM, characterized by large increases in mid-latitude tropospheric humidity and enhanced cycling of carbon through terrestrial ecosystems. Expand
New chronology for the late Paleocene thermal maximum and its environmental implications
The late Paleocene thermal maximum (LPTM) is associated with a brief, but intense, interval of global warming and a massive perturbation of the global carbon cycle. We have developed a new orbitalExpand
A blast of gas in the latest Paleocene: simulating first-order effects of massive dissociation of oceanic methane hydrate.
Significant CH4 release from oceanic hydrates is a plausible explanation for observed carbon cycle perturbations during the thermal maximum because the flux of CH4 invoked during the maximum is of similar magnitude to that released to the atmosphere from present-day anthropogenic CH4 sources. Expand
A Transient Rise in Tropical Sea Surface Temperature During the Paleocene-Eocene Thermal Maximum
Using mixed-layer foraminifera, it is found that the combined proxies imply a 4° to 5°C rise in Pacific SST during the PETM, which would necessitate a rise in atmospheric pCO2 to levels three to four times as high as those estimated for the late Paleocene. Expand
Early Cenozoic decoupling of the global carbon and sulfur cycles
[1] Changes in carbon and sulfur cycling over geologic time may have caused considerable modification of atmospheric and oceanic composition and climate. Here we calculate pyrite sulfur (Spy) andExpand
Climate and sea-level perturbations during the Incipient Eocene Thermal Maximum: evidence from siliciclastic units in the Basque Basin (Ermua, Zumaia and Trabakua Pass), northern Spain
Abstract Based on carbon isotope stratigraphy and lithology, a revised high-resolution correlation is proposed between sections spanning the Incipient Eocene Thermal Maximum (IETM) in the BasqueExpand
Warming the fuel for the fire: Evidence for the thermal dissociation of methane hydrate during the Paleocene-Eocene thermal maximum
Dramatic warming and upheaval of the carbon system at the end of the Paleocene Epoch have been linked to massive dissociation of sedimentary methane hydrate. However, testing the Paleocene-EoceneExpand
Abrupt deep-sea warming, palaeoceanographic changes and benthic extinctions at the end of the Palaeocene
A remarkable oxygen and carbon isotope excursion occurred in Antarctic waters near the end of the Palaeocene (~57.33 Myr ago), indicating rapid global warming and oceanographic changes that causedExpand