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

  title={Rapid Acidification of the Ocean During the Paleocene-Eocene Thermal Maximum},
  author={James C. Zachos and Ursula R{\"o}hl and Stephen A. Schellenberg and Appy Sluijs and David A. Hodell and D. Clay Kelly and Ellen Thomas and Micah J. Nicolo and Isabella Raffi and Lucas J. Lourens and Heather K McCarren and Dick 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… 

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 system

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 overlies

The seawater carbon inventory at the Paleocene–Eocene Thermal Maximum

  • L. HaynesB. Hönisch
  • Environmental Science, Geography
    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.

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 of

On the duration of the Paleocene‐Eocene thermal maximum (PETM)

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 massive

Maximum Eocene Thermal − Extreme warming of tropical waters during the Paleocene

The Paleocene–Eocene Thermal Maximum (PETM), ca. 56 Ma, was a major global environmental perturbation attributed to a rapid rise in the concentration of greenhouse gases in the atmosphere.

What caused the long duration of the Paleocene-Eocene Thermal Maximum?

  • R. Zeebe
  • Environmental Science, Geography
  • 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.

Surface ocean warming and acidification driven by rapid carbon release precedes Paleocene-Eocene Thermal Maximum

The Paleocene-Eocene Thermal Maximum (PETM) is recognized by a major negative carbon isotope (δ13C) excursion (CIE) signifying an injection of isotopically light carbon into exogenic reservoirs, the

Beyond methane: Towards a theory for the Paleocene-Eocene Thermal Maximum




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 dissociation

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 latest

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.

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 orbital

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.

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) and

Latest Paleocene benthic extinction event on the southern Tethyan shelf (Egypt): Foraminiferal stable isotopic (δ13C, δ18O) records

The dramatic global extinction of 35%–50% of benthic foraminifera species in the deep sea in the latest Paleocene and associated negative excursions in δ 13 C and δ 18 O may be related to spreading

Response of Antarctic (ODP Site 690) planktonic foraminifera to the Paleocene–Eocene thermal maximum: Faunal evidence for ocean/climate change

  • D. Kelly
  • Environmental Science, Geography
  • 2002
[1] High-resolution study of Antarctic planktonic foraminiferal assemblages (Ocean Drilling Program Site 690, Weddell Sea) shows that these microplankton underwent a stepwise series of changes during

New evidence for subtropical warming during the Late Paleocene thermal maximum: Stable isotopes from Deep Sea Drilling Project Site 527, Walvis Ridge

The late Paleocene thermal maximum (LPTM) was a dramatic, short-term global warming event that occurred ∼55 Ma. Warming of high-latitude surface waters and global deep waters during the LPTM has been