Northern Hemisphere forcing of climatic cycles in Antarctica over the past 360,000 years

  title={Northern Hemisphere forcing of climatic cycles in Antarctica over the past 360,000 years},
  author={Kenji Kawamura and Fr{\'e}d{\'e}ric Parrenin and Lorraine E. Lisiecki and Ryu Uemura and Françoise Vimeux and Jeffrey P. Severinghaus and Manuel A. Hutterli and Takakiyo Nakazawa and Shuji Aoki and Jean Jouzel and Maureen E. Raymo and Koji Matsumoto and Hisakazu Nakata and Hideaki Motoyama and Shuji Fujita and Kumiko Goto‐Azuma and Yoshiyuki Fujii and Okitsugu Watanabe},
The Milankovitch theory of climate change proposes that glacial–interglacial cycles are driven by changes in summer insolation at high northern latitudes. The timing of climate change in the Southern Hemisphere at glacial–interglacial transitions (which are known as terminations) relative to variations in summer insolation in the Northern Hemisphere is an important test of this hypothesis. So far, it has only been possible to apply this test to the most recent termination, because the dating… 

Synchronicity of Antarctic temperatures and local solar insolation on orbital timescales

The Antarctic ice-core-derived temperature record, one of the best-dated records of the late Pleistocene temperature evolution, cannot be used to support or contradict the Milankovitch hypothesis that global climate changes are driven by Northern Hemisphere summer insolation variations.

Antarctic temperature at orbital timescales controlled by local summer duration

During the late Pleistocene epoch, proxies for Southern Hemisphere climate from the Antarctic ice cores vary nearly in phase with Northern Hemisphere insolation intensity at the precession and

A global perspective on Last Glacial maximum to Holocene climate change

North American ice-sheet dynamics and the onset of 100,000-year glacial cycles

The importance of ice dynamics and ice–climate interactions in establishing the 100,000-year glacial cycles is demonstrated, with enhanced North American ice-sheet growth and the subsequent merging of the ice sheets being key elements.

Climate change: Another Antarctic rhythm

  • K. Fujita
  • Environmental Science, Geography
  • 2011
Thomas Laepple and colleagues show that accumulation of Antarctic snow is biased towards austral winter and may be explained simply by variations in local insolation, with no recourse to northern influences.

State dependence of climatic instability over the past 720,000 years from Antarctic ice cores and climate modeling

Numerical experiments showed that climate becomes most unstable in intermediate glacial conditions associated with large changes in sea ice and the Atlantic Meridional Overturning Circulation, and model sensitivity experiments suggest that the prerequisite for the most frequent climate instability with bipolar seesaw pattern during the late Pleistocene era is associated with reduced atmospheric CO2 concentration via global cooling and sea ice formation in the North Atlantic.

Accurate chronology for Antarctic ice cores on orbital timescales

Deep ice cores from Antarctica have provided key records of past climate, including local temperature, atmospheric greenhouse gases and aerosols (e.g., Petit et al., 1999; Kawamura et al., 2007;

Onset of deglacial warming in West Antarctica driven by local orbital forcing

Results from a new, annually resolved ice-core record from West Antarctica suggest a more active role for the Southern Ocean in the onset of deglaciation than is inferred from ice cores in the East Antarctic interior, which are largely isolated from sea-ice changes.

Southern Hemisphere and Deep-Sea Warming Led Deglacial Atmospheric CO2 Rise and Tropical Warming

The chronology of high- and low-latitude climate change at the last glacial termination is determined by radiocarbon dating benthic and planktonic foraminiferal stable isotope and magnesium/calcium records from a marine core collected in the western tropical Pacific.



Homogeneous climate variability across East Antarctica over the past three glacial cycles

An isotopic profile from a core drilled at Dome Fuji indicates that Antarctic climate is essentially homogeneous at the scale of the East Antarctic Plateau, possibly as a consequence of the symmetry of the plateau and the adjacent ocean.

The timing of major climate terminations

  • M. Raymo
  • Environmental Science, Geography
  • 1997
A simple, untuned “constant sedimentation rate” timescale developed using three radiometric age constraints and eleven δ18O records longer than 0.8 Myr provides strong support for the validity of the

One-to-one coupling of glacial climate variability in Greenland and Antarctica

A glacial climate record derived from an ice core from Dronning Maud Land, Antarctica, is presented which represents South Atlantic climate at a resolution comparable with the Greenland ice core records and shows a one-to-one coupling between all Antarctic warm events and Greenland Dansgaard–Oeschger events by the bipolar seesaw.

Modelled atmospheric temperatures and global sea levels over the past million years

A coupled model of the Northern Hemisphere ice sheets and ocean temperatures, forced to match an oxygen isotope record for the past million years compiled from 57 globally distributed sediment cores, finds that during extreme glacial stages, air temperatures were 17.8 °C lower than present, with a 120 ± 10 m sea level equivalent of continental ice present.

Evidence from U–Th dating against Northern Hemisphere forcing of the penultimate deglaciation

The penultimate deglaciation in a record from the Bahamas is date using a new U-Th isochron technique and the midpoint age is determined to be 135 ± 2.5 kyr ago, which is consistent with some coral-based sea-level estimates, but it is difficult to reconcile with June Northern Hemisphere insolation as the trigger for the ice-age cycles.

Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica

The recent completion of drilling at Vostok station in East Antarctica has allowed the extension of the ice record of atmospheric composition and climate to the past four glacial–interglacial cycles.

Timing of millennial-scale climate change in Antarctica and Greenland during the last glacial period.

A precise relative chronology for Greenland and West Antarctic paleotemperature is extended to 90,000 years ago, based on correlation of atmospheric methane records from the Greenland Ice Sheet Project 2 and Byrd ice cores, to provide further evidence for the operation of a "bipolar see-saw" in air temperatures and an oceanic teleconnection between the hemispheres on millennial time scales.

Obliquity pacing of the late Pleistocene glacial terminations

A statistical test of the orbital forcing hypothesis is presented, focusing on the rapid deglaciation events known as terminations, and it is shown that the null hypothesis that glacial terminations are independent of obliquity can be rejected at the 5% significance level, whereas the corresponding null hypotheses for eccentricity and precession cannot be rejected.