Fig. 3: Initial and subsequent shift versus melt fraction amplitude.

The colormap shows the subsequent longitudinal shift of the tidal dissipation pattern resulting from an imposed degree and order 2 melt fraction pattern with varying melt fraction amplitude (x-axis) and eastward shift (y-axis). We define the subsequent shift as the total shift of the tidal dissipation pattern (only the degree and order 2 part) minus the shift of the imposed melt fraction pattern. In the stable band, the white area, further iterations do not change the shift. The colored lines represent the path followed in successive iterations when we only propagate the degree and order 2 component for different coupling strengths; the corresponding values for c can be found in the Methods. The case for which iterations do not result in a converged pattern (rightmost purple line) but a continuously moving pattern, is plotted in full in Supplementary Fig. 6.