North Pacific seasonality and the glaciation of North America 2.7 million years ago

@article{Haug2005NorthPS,
  title={North Pacific seasonality and the glaciation of North America 2.7 million years ago},
  author={Gerald H. Haug and Andrey Ganopolski and Daniel M. Sigman and Antoni Rosell‐Mel{\'e} and George E. A. Swann and Ralf Tiedemann and Samuel Laurent Jaccard and J{\"o}rg Bollmann and Mark A. Maslin and Melanie J. J Leng and Geoffrey Eglinton},
  journal={Nature},
  year={2005},
  volume={433},
  pages={821-825}
}
In the context of gradual Cenozoic cooling, the timing of the onset of significant Northern Hemisphere glaciation 2.7 million years ago is consistent with Milankovitch's orbital theory, which posited that ice sheets grow when polar summertime insolation and temperature are low. However, the role of moisture supply in the initiation of large Northern Hemisphere ice sheets has remained unclear. The subarctic Pacific Ocean represents a significant source of water vapour to boreal North America… 

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