Aridification of the Sahara desert caused by Tethys Sea shrinkage during the Late Miocene

@article{Zhang2014AridificationOT,
  title={Aridification of the Sahara desert caused by Tethys Sea shrinkage during the Late Miocene},
  author={Zhongshi Zhang and Gilles Ramstein and Mathieu Schuster and Camille Li and Camille Contoux and Qing Yan},
  journal={Nature},
  year={2014},
  volume={513},
  pages={401-404}
}
It is widely believed that the Sahara desert is no more than ∼2–3 million years (Myr) old, with geological evidence showing a remarkable aridification of north Africa at the onset of the Quaternary ice ages. Before that time, north African aridity was mainly controlled by the African summer monsoon (ASM), which oscillated with Earth’s orbital precession cycles. Afterwards, the Northern Hemisphere glaciation added an ice volume forcing on the ASM, which additionally oscillated with glacial… 
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