Figure 4: Ice Core Model-Data Comparison at NGRIP: effect of diffusion length (σ) on β. Estimated power spectral density for simulated (purple) vs. observed (black) δ18O of ice and the effect of varying diffusion length parameters. The grey shaded region spans experiments resampling the data 1000 times varying the diffusion length from 12 · σ to 2 · σ. In the case where σ = 0 (the royal blue line, δ18OPRECIP), GCM-simulated data is generally in agreement with the observations.
...read more