Fig. 6: Evolution of ice volume above basal channels under the RCP 8.5 scenario.
Map of the Petermann Ice Shelf draft overlaid with channel sections along the western (Sw; blue), central (Sc; black), and eastern (Se; red) regions (a) which are used in calculating the changes in respective channel averaged annual mean ice volume above the channel over time in panel (b) for the RCP 8.5 discharge experiment, following Eqns. (5) and (6) (Table 2). Apex locations of four prominent longitudinal ice shelf basal channels at the across-fjord transect shown in Fig. 5 are represented using magenta diamonds. For each colour-coded channel section shown in (a), corresponding changes in mean ice volume above the channel section are shown in (b) for three different ice advection rates, namely, 0.5 km/yr (asterisk), 1 km/yr (solid line) and 1.5 km/yr (circle). Channel averaged annual mean basal melt rates for Sw, Sc, and Se are, respectively, 45 m/yr, 51 m/yr, and 47 m/yr.
