Supplementary Material

• Supplementary Table 1: Statistical results for various inversions.
• Supplementary Figure 1: Comparison of density models obtained from different starting models.
• Supplementary Figure 2: Comparison of density and P velocity models obtained from different starting models.
• Supplementary Figure 3: Comparison of density models with various parameterisations.
• Supplementary Figure 4: Comparison of density models with and without boundary topography.
• Supplementary Figure 5: Resolution tests with input peak at a depth.
• Supplementary Figure 6: Backus-Gilbert resolution kernels.
• Supplementary Figure 7: Checker-board resolution tests.
• Supplementary Figure 8: Resolution tests for the 660 and the CMB.
• Supplementary Figure 9: Mode-by-mode improvements in fit.
• Supplementary Figure 10: Effects of random noise in the data on the inversion.
• Supplementary Figure 11: Resolution matrix for the real part of degree 2 order 1.
• Supplementary Figure 12: Dependence on data sets (Density models at 2850 km depth).
• Supplementary Figure 13: Dependence on data sets (Comparison of models).
• Supplementary Figure 14: Density model using different radial basis function.

Reference