Figure 2 . Data used to constrain timing of terminus retreat. (a) Landsat images of the Crane terminus, with manually-identified ice fronts (white), the Rack & Rott (2004) grounding line, and the calculated 2002 floatation point (orange) shown. (b) Altimetry record of near-terminus surface elevation, from NASA’s ATM and LVIS altimeters (2002-2018), and ICESat-2-calibrated photogrammetric DEMs produced from Maxar stereoimagery (2021). (c) Terminus evolution through time, corresponding to ice fronts in (a) and altimetry in (b).