Wind-driving contribution of different ions to the total wind acceleration, ${\mathrm{\Gamma }}_{\mathrm{rad}}^{\mathrm{total}}$. The upper panel focuses on the contribution of different Fe ions. The acceleration by electron scattering (Γ_es) and by H I are shown. The lower panel shows the breakdown of the contributions of CNO and Si ions. Fe III and the electron scattering acceleration, the most important contributors to wind launching, are also shown for comparison. The vertical lines represent the photospheric, sonic, and critical radii (dotted gray, dashed gray, and thin black lines, respectively). The dotted brown line marks the point where X-ray emission is switched on.