Abrupt deep-sea warming, palaeoceanographic changes and benthic extinctions at the end of the Palaeocene

  title={Abrupt deep-sea warming, palaeoceanographic changes and benthic extinctions at the end of the Palaeocene},
  author={James Peter Kennett and Lowell D. Stott},
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 one of the largest deep-sea benthic extinctions of the past 90 million years. In contrast, the oceanic plankton were largely unaffected, implying a decoupling of the deep and shallow ecosystems. The data suggest that for a few thousand years, ocean circulation underwent fundamental changes producing a… 
Nannoplankton Extinction and Origination Across the Paleocene-Eocene Thermal Maximum
The Paleocene-Eocene Thermal Maximum was an interval of global warming and ocean acidification attributed to rapid release and oxidation of buried carbon that appears to have driven turnover, preferentially affecting rare taxa living close to their viable limits.
The Source and Fate of Massive Carbon Input During the Latest Paleocene Thermal Maximum.
The deposition of a mud clast interval and seismic evidence for slope disturbance provide evidence to confirm the gas hydrate dissociation hypothesis and identify the Blake Nose as a site of methane release.
Deep-Sea Temperature and Circulation Changes at the Paleocene-Eocene Thermal Maximum
Foraminiferal magnesium/calcium ratios indicate that bottom waters warmed by 4° to 5°C, similar to tropical and subtropical surface ocean waters, implying no amplification of warming in high-latitude regions of deep-water formation under ice-free conditions.
Rapid carbon injection and transient global warming during the Paleocene-Eocene thermal maximum
  • A. Stuijs, H. Brinkhuis
  • Environmental Science, Geography
    Netherlands Journal of Geosciences - Geologie en Mijnbouw
  • 2008
The Paleocene-Eocene Thermal Maximum (PETM), ~55.5 Myr ago, was a geologically brief (~170 kyr) episode of globally elevated temperatures, which occurred superimposed on the long-term late Paleocene
Palynomorphs from a sediment core reveal a sudden remarkably warm Antarctica during the middle Miocene
An exceptional triple palynological signal (unusually high abundance of marine, freshwater, and terrestrial palynomorphs) recovered from a core collected during the 2007 ANDRILL (Antarctic geologic
Abrupt reversal in ocean overturning during the Palaeocene/Eocene warm period
These results corroborate climate model inferences that a shift in deep-ocean circulation would deliver relatively warmer waters to the deep sea, thus producing further warming and can initiate abrupt deep-Ocean circulation changes in less than a few thousand years, but may have lasting effects.
Paleocene-Eocene Thermal Maximum: Implications for the benthic extinction Global decline in ocean ventilation, oxygenation, and productivity during the
ABSTRACTThe prominent global warming event at the Paleocene-Eocene boundary (55 Ma), referred to as the Paleocene-Eocene Thermal Maximum (PETM), was characterized by rapid temperature increase and
Global dinoflagellate event associated with the late Paleocene thermal maximum
The late Paleocene thermal maximum, or LPTM (ca. 55 Ma), represents a geologically brief time interval (∼220 k.y.) characterized by profound global warming and associated environmental change. The


Abyssal circulation and benthic foraminiferal changes near the Paleocene/Eocene boundary
A major change in Cenozoic deep-sea benthic foraminifera occurred in the Atlantic, Indian, and Pacific oceans near the Paleocene/Eocene boundary. Benthic foraminiferal abundance changes began at
Oxygen isotopic evidence for the development of the psychrosphere 38 Myr ago
THREE major elements were involved in the evolution of oceanic circulation during the Cainozoic. The first of these was the diminishing role of oceanic meridional circulation in equatorial areas, the
Warm saline bottom water in the ancient ocean
Considerable isotopic evidence indicates that oceanic bottom water was much warmer in the geological past. A simple convection model driven by multiple turbulent buoyant plumes and observations of
Productivity change as a control on planktonic foraminiferal evolution after the cretaceous/tertiary boundary
The rate of evolution of Palaeocene and Early Eocene planktonic Foraminifera is examined using taxonomic data from two distant sites. The two million years immediately following the
Cenozoic evolution of Antarctic glaciation the Circum-Antarctic Ocean and their impact on global paleoceanography
Deep-sea drilling in the Antarctic region (Deep-Sea Drilling Project legs 28, 29, 35, and 36) has provided many new data about the development of circum-Antarctic circulation and the closely related
Tertiary marine paleotemperatures
Oxygen isotopic compositions of the tests of planktonic foraminifera from several Deep Sea Drilling Project sites provide a general picture of low-latitude marine temperatures from Maastrichtian time
Paleoceanography: A review for the GSA Centennial
  • W. Hay
  • Environmental Science, Geography
  • 1988
The central problem of paleoceanography is the history of the circulation of the ocean. Although speculation about ancient oceanic circulation goes back to the past century, the field of
Paleogene stable isotope events
Ocean nutrient distribution and oxygenation: limits on the formation of warm saline bottom water over the past 91 m.y.
It has been proposed that deep-water formation in the oceans would be quite different during geologic intervals with reduced equator to pole temperature gradients. Salinity, rather than temperature,