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    Large contribution from anthropogenic warming to an emerging North American megadroughtGlobal 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).https://science.sciencemag.org ... [Lire la suite]

 

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