Depositional flux of ¹⁰Be in polar ice. All data are pseudo-decadal and 25-yr low-pass smoothed because of strong high-frequency noise. Grey curves depict the fluxes measured at Dome Fuji (DF) in Antarctica (Horiuchi et al. 2007), and at NGRIP (scaled as 0.83), Greenland (Berggren et al. 2009). Error bars are estimates of both statistical and systematic errors. The blue and red curves depict the modelled ¹⁰Be depositional fluxes for the L- and H-scenarios (see text for details), respectively.