Fig. 2 | Nature Communications

Fig. 2

From: A rapid cosmic-ray increase in BC 3372–3371 from ancient buried tree rings in China

Fig. 2

Comparison with IntCal13 data. Comparison of our five-year average of Δ14C data measured in the Beta Analytic laboratory (open squares) with the IntCal13 data (filled squares)4. They are generally consistent with each other considering the measurement errors. Uncertainties (s.d.) of our data are based on error propagation including measurement errors of the fraction of modern carbon F. The errors of filled squares are adopted from IntCal134

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