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Contact: Talia S Ogliore
University of Hawaii at Manoa

El Niño Variability Derived from Tree Rings and Instrumental Measurements

Caption: This graph shows El Niño variability derived from tree rings (blue) and instrumental measurements (red). The dashed lines indicate boundary for natural variability. Recent El Niño behavior is largely beyond natural variability.

Credit: International Pacific Research Center

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Related news release: El Nino unusually active in the late 20th century

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