Figure 3 . Conditions at Crane Glacier compared to process model cliff-failure thresholds. (Left) Cliff-height failure criteria required to trigger MICI (see Text S1; Figure S6, S7), including subaerial cliff height (Hc), bed slope\(\left(\frac{\text{db}}{\text{dx}}\right)\), ice thickness gradient\(\left(\frac{\text{dH}}{\text{dx}}\right)\), and timescale of ice shelf collapse (Tcollapse), with conditions we observe at Crane Glacier provided. (Right) Schematic diagram comparing cliff heights required for brittle failure under strong (S) and weak (W) model treatment of ice, if included in referenced work (with the model authors’ preferred estimate marked with a solid line).