The Greenland Ice Sheet and its surrounding oceans have changed rapidly as a result of shifting climate conditions in recent decades (IMBIE Team, 2019). Since the late 1990s, many of Greenland's tidewater glaciers have experienced periods of substantial thinning and retreat, interspersed with periods of greater stability or re-advance (Howat et al., 2008;Moon et al., 2012). Their mass loss derives from a combination of surface mass balance (the net difference between snow accumulation, meltwater runoff, and sublimation; Fettweis et al., 2017; van den Broeke et al., 2009) and dynamical changes that are associated with glacier