Fig. S4. A) Contour height and minimum distance between contours of the Bab-al-Mandab Strait plotted with the 3rd order polynomial fit (blue line) and 95% confidence intervals using 5000 iterations (red shaded area and lines). The arrow shows our 0 m contour and measured current BaMwidth. Formula and model coefficients are given below. B) Modelled BaMwidth over the last 150 kyrs using the RSL P-max (blue line) and the RSL P-max 95% confidence intervals (red lines).