The Last Glacial Termination

@article{Denton2010TheLG,
  title={The Last Glacial Termination},
  author={George H. Denton and R. F. Anderson and J. R. Toggweiler and Richard Lawrence Edwards and Joerg M. Schaefer and Aaron E. Putnam},
  journal={Science},
  year={2010},
  volume={328},
  pages={1652 - 1656}
}
Warming Up For the past half-million years, our planet has passed through a cycle of glaciation and deglaciation every 100,000 years or so. Each of these cycles consists of a long and irregular period of cooling and ice sheet growth, followed by a termination—a period of rapid warming and ice sheet decay—that precedes a relatively short warm interval. But what causes glacial terminations? Denton et al. (p. 1652) review the field and propose a chain of events that may explain the hows and whys… 

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References

SHOWING 1-10 OF 80 REFERENCES

Migration of the subtropical front as a modulator of glacial climate

It is shown that the degree of northwards migration of the subtropical front can partially decouple global climate from atmospheric partial pressure of carbon dioxide, and help to resolve the long-standing puzzle of differing glacial amplitudes within a consistent range of atmospheric temperatures.

Insolation changes, ice volumes, and the O18 record in deep‐sea cores

A detailed curve of ice volume versus time is needed in order to test the validity of the hypothesis that changes in the earth's orbital parameters are the cause of oscillations in Pleistocene

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

The results indicate that orbital-scale Antarctic climate change lags Northern Hemisphere insolation by a few millennia, and that the increases in Antarctic temperature and atmospheric carbon dioxide concentration during the last four terminations occurred within the rising phase of Northern Hemisphere summer insolation.

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

PALEOCEAN CIRCULATION DURING THE LAST DEGLACIATION : A BIPOLAR SEESAW ?

Hughen et al. [1998] have documented that during the first 200 years of Younger Dryas time the 14C content of atmospheric CO2 increased by ∼50‰ and that during the remainder of this

What drives glacial cycles

The Milankovitch theory advocates that the glacial cycles have three components: the tilt of the earth's spin axis; the shape of the earth's orbit; and the interaction between the tilt and the

Long-term sea surface temperature and climate change in the Australian–New Zealand region

[1] We compile and compare data for the last 150,000 years from four deep-sea cores in the midlatitude zone of the Southern Hemisphere. We recalculate sea surface temperature estimates derived from

Timing of abrupt climate change at the end of the Younger Dryas interval from thermally fractionated gases in polar ice

Rapid temperature change fractionates gas isotopes in unconsolidated snow, producing a signal that is preserved in trapped air bubbles as the snow forms ice. The fractionation of nitrogen and argon
...