Fig. 4: Reconstruction covariance.
a Inter-series correlations of the eight reconstructions shown in Fig. 3 calculated over 50-year intervals lagged by 25 years, including ±2SE bars. The one-tailed 95% significance threshold for 50-year windows is a correlation of approximately 0.24, which is represented by the solid pink line. b Comparison of the normalized P2k19 ensemble median and Bün20 reconstructions from 450 to 650 CE, and the Wil16 and P2k19 reconstructions from 1420 to 1620 and 1800 to 2000 CE. Dashed lines indicate the timing of major volcanic eruptions.
