How Antarctica got its ice

@article{Lear2016HowAG,
  title={How Antarctica got its ice},
  author={Caroline H. Lear and Daniel J. Lunt},
  journal={Science},
  year={2016},
  volume={352},
  pages={34 - 35}
}
  • C. LearD. Lunt
  • Published 1 April 2016
  • Environmental Science, Geology
  • Science
A complex set of interactions caused the rapid growth of the Antarctic ice sheet 34 million years ago [Also see Report by Galeotti et al.] Ice sheets such as those on Greenland and Antarctica today not only respond to changing climate but can also cause climate to change. Their sizes have fluctuated substantially in the past. In particular, Antarctica was effectively ice-free until its ice cover began to expand rapidly at the Eocene-Oligocene boundary around 34 million years ago (see the figure… 
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’ s repository of research publications and other research outputs Geological Society of London Scientific Statement : what the geological record tells us about our present and future climate

Lear, Caroline H.; Anand, Pallavi; Blenkinsop, Tom; Foster, Gavin L.; Gagan, Mary; Hoogakker, Babette; Larter, Robert D.; Lunt, Daniel J.; McCave, I. Nicholas.; McClymont, Erin; Pancost, Richard D.;…

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Antarctica

References

SHOWING 1-10 OF 14 REFERENCES

Antarctic Ice Sheet variability across the Eocene-Oligocene boundary climate transition

Sedimentary cycles from a drillcore in the western Ross Sea provide direct evidence of orbitally controlled glacial cycles between 34 million and 31 million years ago and provide insight into the potential of the AIS for threshold behavior and have implications for its sensitivity to atmospheric CO2 concentrations above present-day levels.

Rapid Cenozoic glaciation of Antarctica induced by declining atmospheric CO2

In this simulation, declining Cenozoic CO2 first leads to the formation of small, highly dynamic ice caps on high Antarctic plateaux, and at a later time, a CO2 threshold is crossed, initiating ice-sheet height/mass-balance feedbacks that cause the ice caps to expand rapidly with large orbital variations, eventually coalescing into a continental-scale East Antarctic Ice Sheet.

Antarctic glaciation caused ocean circulation changes at the Eocene–Oligocene transition

It is found that growth of the Antarctic ice sheet caused enhanced northward transport of Antarctic intermediate water and invigorated the formation of Antarctic bottom water, fundamentally reorganizing ocean circulation, whereas gateway openings had much less impact on ocean thermal stratification and circulation.

Atmospheric carbon dioxide through the Eocene–Oligocene climate transition

The results confirm the central role of declining in the development of the Antarctic ice sheet (in broad agreement with carbon cycle modelling) and help to constrain mechanisms and feedbacks associated with the Earth’s biggest climate switch of the past 65 Myr.

Atmospheric and oceanic impacts of Antarctic glaciation across the Eocene–Oligocene transition

It is shown that the global atmosphere and ocean response to growth of the Antarctic ice sheet is sensitive to subtle variations in palaeogeography, using two reconstructions representing Eocene and Oligocene geological stages using the HadCM3L model.

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…

Carbon cycle feedbacks and the initiation of Antarctic glaciation in the earliest Oligocene

Links between CO 2 , glaciation and water flow: reconciling the Cenozoic history of the Antarctic Circumpolar Current

Abstract. The timing of the onset of the Antarctic Circumpolar Current (ACC) is a crucial event of the Cenozoic because of its cooling and isolating effect over Antarctica. It is intimately related…

Opening the gateways for diatoms primes Earth for Antarctic glaciation

Refining our estimate of atmospheric CO2 across the Eocene–Oligocene climatic transition