Fig. 2
From: Solar superstorm of AD 774 recorded subannually by Arctic tree rings
14C measurements of the ME from multiple locations (see main text above for abbreviations). The horizontal axis represents the calendar year of the growing season, and the vertical axis represents the age-corrected and baseline-adjusted Δ14C (see Methods, Supplementary Table 3). The baseline adjustment has been performed for easier comparison of the data. The dashed red line shows an example of the analytical type I Gumbel distribution function (GDF) fit to the JAP data. Each measurement has a standard error of typically ±3‰ as visualized in the lower right corner. Original intensities, uncertainties and fitting procedure are as described in the Methods section
