Fig. 4: Absolute ages of the tree-ring data.
From: Atmospheric radiocarbon levels were highly variable during the last deglaciation
Comparison of the 3 floating tree-ring chronologies (coloured symbols, plotted with 1σ error bars) to modelled Δ14C based on 10Be-fluxes from the GRIP ice core (yellow line)46. The absolute ages of the tree-ring data are inferred by14C/12C comparison. The Δ14C is shown as the anomaly from the mean of each chronology. The ice-core data are shown on the GICC05 timescale shifted by +190 years48,49 and high-pass filtered with a cutoff-period of 1000 years.
