Large contribution from anthropogenic warming to an emerging North American megadrought

@article{Williams2020LargeCF,
  title={Large contribution from anthropogenic warming to an emerging North American megadrought},
  author={A. Park Williams and Edward R. Cook and Jason E. Smerdon and Benjamin I. Cook and John T. Abatzoglou and Kasey Bolles and Seung H. Baek and Andrew M. Badger and Ben Livneh},
  journal={Science},
  year={2020},
  volume={368},
  pages={314 - 318}
}
A trend of warming and drying Global warming has pushed what would have been a moderate drought in southwestern North America into megadrought territory. Williams et al. used a combination of hydrological modeling and tree-ring reconstructions of summer soil moisture to show that the period from 2000 to 2018 was the driest 19-year span since the late 1500s and the second driest since 800 CE (see the Perspective by Stahle). This appears to be just the beginning of a more extreme trend toward… 
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