Atmospheric carbon dioxide through the Eocene–Oligocene climate transition

  title={Atmospheric carbon dioxide through the Eocene–Oligocene climate transition},
  author={Paul Nicholas Pearson and Gavin L. Foster and Bridget S Wade},
Geological and geochemical evidence indicates that the Antarctic ice sheet formed during the Eocene–Oligocene transition, 33.5–34.0 million years ago. Modelling studies suggest that such ice-sheet formation might have been triggered when atmospheric carbon dioxide levels () fell below a critical threshold of ∼750 p.p.m.v., but the timing and magnitude of relative to the evolution of the ice sheet has remained unclear. Here we use the boron isotope pH proxy on exceptionally well-preserved… CONTINUE READING
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