Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition

@article{Hren2013TerrestrialCI,
  title={Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition},
  author={Michael T Hren and Nathan D. Sheldon and Stephen T. Grimes and Margaret E. Collinson and Jerry J. Hooker and Melanie J. Bugler and Kyger C. Lohmann},
  journal={Proceedings of the National Academy of Sciences},
  year={2013},
  volume={110},
  pages={7562 - 7567}
}
Geochemical and modeling studies suggest that the transition from the “greenhouse” state of the Late Eocene to the “icehouse” conditions of the Oligocene 34–33.5 Ma was triggered by a reduction of atmospheric pCO2 that enabled the rapid buildup of a permanent ice sheet on the Antarctic continent. Marine records show that the drop in pCO2 during this interval was accompanied by a significant decline in high-latitude sea surface and deep ocean temperature and enhanced seasonality in middle and… 
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