Fig. 5 | Scientific Reports

Fig. 5

From: Woody legacies of railroad ties from the Southern Atacama Desert used to strengthen Nothofagus obliqua tree-ring chronologies from Northern Patagonia

Fig. 5

14C wiggle matching of the N. obliqua ALC002 tree-ring sample using as a reference curve the series of the 14C content in annual rings from the Southern Hemisphere zone 1-2 developed by Hua et al.80 (curve in red). Six consecutive years (blue) of the N. obliqua ALC002 series wiggle-matched to the exact calendar year during the bomb peak period. Inset plot: output of the Chi-square (χ2) Monte-Carlo test at 95% probability (horizontal orange line), t-statistic= 11.07; df = 6, the red dot indicates the lowest χ2 value (χ2 = 1.7; maximum probability) indicating the calendar year of the most recent year of the 14C N. obliqua series.

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