Extended Data Fig. 4: Channel peak melt rates and normalized breakthrough times (NBTs).
From: Channelized melt beneath Antarctic ice shelves previously underestimated
a) Channel peak melt rates compared to ice shelf thicknesses outside the channels. Dashed lines connect peak melt rates from the different products of the same channel. Filled markers indicate channels with a characteristic channel width of 1.5-3.5 km, which is comparable to the characteristic channel width (2.5 km) used to obtain NBTs17. Unfilled markers represent all other channels (only narrower). Dashed square marks the zoomed-in region in b). In the lower subpanel, the thick, vertical black line represents the median peak melt rate, the solid box ranges from the first to the third quartile, and the whiskers extend the box to 1.5x the inter-quartile range. The box plots are based on 88, 107, and 108 (sub-)channels for Adusumilli7, Davison8, and BURGEE, respectively. b) Zoom-in of channel peak melt rates compared to ice shelf thicknesses outside the channels and NBTs obtained from ref. 17. An NBT of 1 is when linear breakthrough and breakthrough with secondary flow are equal. Linear breakthrough times are shown in Suppl. Fig. 7.
