Fig. 3
From: A rapid cosmic-ray increase in BC 3372–3371 from ancient buried tree rings in China
Comparison with IntCal13 original data. Comparison of our data measured at the Beta laboratory (filled dots) with the IntCal13 original data (The UW Quaternary Isotope Laboratory (QL, open squares)26, The Queen’s University of Belfast (UB, open dots)27). For the three Δ14C value measured in the same year, they are consistent with each other within measurement errors. The value of Δ14C at bc 3385 from QL is between the nearby two points measured in Beta laboratory. Therefore, our measured results well agree with the IntCal13 original data considering the measurement errors. Uncertainties (s.d.) are based on error propagation including measurement errors of the fraction of modern carbon F
