Fig. 10

Simulated ∆¹⁴C time series (black) based on the ¹⁰Be concentration stack used as an input of the 12-box model²². The blue and orange time series correspond to simulations with an enhanced variability of 8 and 12%, respectively, aiming to represent minimum uncertainties on the resulting ∆¹⁴C. The yellow curve corresponds to a simulation with the ¹⁰Be stack with an enhanced long-term trend to take into account the polar bias for geomagnetic changes and a reduced high frequency variability to correct for the polar amplification of heliomagnetic changes³⁶. An additional reduction of 5% of the variability has been applied to account for production sensibility differences for ¹⁴C compared to ¹⁰Be⁶⁹.