An Ancient Carbon Mystery

  title={An Ancient Carbon Mystery},
  author={Mark Pagani and Ken Caldeira and David F. Archer and James C. Zachos},
  pages={1556 - 1557}
Sudden global warming 55 million years ago provides evidence for high climate sensitivity to atmospheric CO, but the source of the carbon remains enigmatic. 
Carbon dioxide forcing alone insufficient to explain Palaeocene–Eocene Thermal Maximum warming
About 55 million years ago global surface temperatures increased by 5–9 ∘C within a few thousand years, following a pulse of carbon released to the atmosphere. Analysis of existing data with a carbon
A Hotter Greenhouse?
A controversy about how high tropical temperatures were during a previous hot period may soon be resolved.
Slow release of fossil carbon during the Palaeocene-Eocene Thermal Maximum
A brief period of warming 55.9 Myr ago has been attributed to the release of massive amounts of carbon. Geochemical and model data suggest the peak rate of carbon emission during this interval was
A middle Eocene carbon cycle conundrum
A 500,000-year-long period of warmth in the middle Eocene was marked by high atmospheric carbon dioxide concentrations and prolonged dissolution of carbonate in the deep oceans. Numerical simulations
A magmatic trigger for the Paleocene-Eocene Thermal Maximum?
  • A. Dubin
  • Geology, Environmental Science
  • 2015
Thesis: Ph. D., Joint Program in Chemical Oceanography (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution),
6.13 – Greenhouse Climates
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 warming
Climate Stabilization Targets : Emissions , Concentrations , And Impacts Over Decades To Millennia
  • Environmental Science
  • 2011
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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.
Release of methane from a volcanic basin as a mechanism for initial Eocene global warming
It is proposed that intrusion of voluminous mantle-derived melts in carbon-rich sedimentary strata in the northeast Atlantic may have caused an explosive release of methane—transported to the ocean or atmosphere through the vent complexes—close to the Palaeocene/Eocene boundary.
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
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
Arctic hydrology during global warming at the Palaeocene/Eocene thermal maximum
The Palaeocene/Eocene thermal maximum represents a period of rapid, extreme global warming ∼55 million years ago, superimposed on an already warm world. This warming is associated with a severe
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
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-Eocene
Subtropical Arctic Ocean temperatures during the Palaeocene/Eocene thermal maximum
It is shown that sea surface temperatures near the North Pole increased from ∼18 °C to over 23‬°C during this event, which suggests that higher-than-modern greenhouse gas concentrations must have operated in conjunction with other feedback mechanisms—perhaps polar stratospheric clouds or hurricane-induced ocean mixing—to amplify early Palaeogene polar temperatures.