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Ancient trees reveal their secrets

Instrumental records show that El Niño is highly variable in space and time. Now a thousand-year-long record from trees in the southwestern United States reveals even greater extremes, and a possible link between El Niño activity and climate warming.

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Figure 1: A Juniper tree in Yosemite National Park.



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Correspondence to Matthew Therrell.

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Therrell, M. Ancient trees reveal their secrets. Nature Clim Change 1, 94–95 (2011).

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