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

@article{Zachos2005RapidAO,
  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},
  journal={Science},
  year={2005},
  volume={308},
  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. Haynes, B. Hönisch
  • Environmental Science, Geography
    Proceedings of the National Academy of Sciences
  • 2020
TLDR
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
Surface ocean warming and acidification driven by rapid carbon release precedes Paleocene-Eocene Thermal Maximum
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Beyond methane: Towards a theory for the Paleocene-Eocene Thermal Maximum
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 the
A seasonality trigger for carbon injection at the Paleocene–Eocene Thermal Maximum
Abstract. The Paleocene–Eocene Thermal Maximum (PETM) represents a ~170 kyr episode of anomalous global warmth ~56 Ma ago. The PETM is associated with rapid and massive injections of 13C-depleted
Carbon burp and transient global warming during the Paleocene-Eocene Thermal Maximum.
  • A. Sluijs
  • Environmental Science, Geography
  • 2008
The Paleocene–Eocene Thermal Maximum (PETM), ~55.5 Myr ago, was a geologically brief (~170 kyr) episode of globally elevated temperatures that occurred superimposed on the long-term late Paleocene
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References

SHOWING 1-10 OF 21 REFERENCES
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
TLDR
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.
A blast of gas in the latest Paleocene: simulating first-order effects of massive dissociation of oceanic methane hydrate.
TLDR
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.
A Transient Rise in Tropical Sea Surface Temperature During the Paleocene-Eocene Thermal Maximum
TLDR
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.
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 caused
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
Impact of Anthropogenic CO2 on the CaCO3 System in the Oceans
TLDR
The in situ CaCO3 dissolution rates for the global oceans from total alkalinity and chlorofluorocarbon data are estimated, and the future impacts of anthropogenic CO2 on Ca CO3 shell–forming species are discussed.
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