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Climate change

Old droughts in New Mexico

A long climate record reveals abrupt hydrological variations during past interglacials in southwestern North America. These data set a natural benchmark for detecting human effects on regional climates. See Letter p.518

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Figure 1: An aerial view of Valles Caldera, site of the lake sediments from which Fawcett et al.1 extracted their climate record.

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Williams, J. Old droughts in New Mexico. Nature 470, 473–474 (2011). https://doi.org/10.1038/470473a

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