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Tree rings floating on ice cores

Because of difficulties in creating a radiocarbon calibration that covers the end of the last glaciation, defining the timing and duration of the Younger Dryas cold event has been a challenge. Linking related cosmogenic isotopes in tree rings and ice cores may provide new insights into abrupt climate changes.

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Figure 1: Comparison of two calibrations of a hypothetical radiocarbon-dated event.


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Reimer, P., Hughen, K. Tree rings floating on ice cores. Nature Geosci 1, 218–219 (2008).

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