Fig. 4

Comparison of average first-order Sobol indices within 19 parameters. The first diagram displays the sorted parameters by decreasing \(log_{10}([{\overline{S}}]_{\downarrow })\). In order to detect the sharp drop in the \(\overline{S_{global, i}}\), the logarithms of relative ratios between the former one and the latter one \(r(i-1, i)\) are shown in the second diagram