Fig. 1.

Reconstructed mean annual temperature for each of the five methods (columns) and six 30° latitude bands (rows). Colored lines are ensemble medians. The uncertainties for each method take into account different sources of errors as described in Methods and listed in Table 1. The methods include Standard Calibrated Composite (SCC), Dynamic Calibrated Composite (DCC), Composite Plus Scale (CPS), Pairwise Comparison (PAI) and Generalized Additive Model (GAM). Temperature anomalies are relative to 1800–1900. The number of proxy records represented within each 100-year time step is shown in the sixth column (sample depth). Light-grey vertical bars are the number of records calibrated to temperature and the dark-grey bars are the number of non-calibrated proxy records. The actual number of records used differs slightly among the reconstruction methods depending on limitations of each.