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Studentized residuals of FT (A), PH (B), and TGW (C) for each regeneration year. Residuals were estimated by modeling independent variances of residuals for each of the regeneration years. We alternated between red and blue colors to distinguish consecutive years. Dashed lines display thresholds for defining outliers. For TGW the outlier year 1961 is not shown. Please note that due to different data density per year and years without data the x-axes are not linear.
