Extended Data Fig. 4: Alternative lead-lag analysis using one-box models with variable e-folding timescales.
From: Abrupt changes in the global carbon cycle during the last glacial period
The results of correlation of the various ice core proxy time-series against atmospheric CO2 after being passed through a series of one-box models. The x-axis shows the variable e-folding timescales of each run. Shading shows the uncertainty introduced from Monte Carlo error estimates in the delta-age history (90% CI) as in Fig. 1b (main text). The maximum reached in each curve indicates the apparent lead-lag with the horizontal bars indicate the range in maximum R2 values from the delta-age histories.
