Extended Data Fig. 3: Ice thickness and basal channels.
From: Channelized melt beneath Antarctic ice shelves previously underestimated
a–i, BedMachineV3 ice thicknesses43 overlaid with detected channels (’all channels’) of Pine Island (a), Thwaites (b), Dotson/Crosson (c), Drygalski (d), Cook (e), Mertz (f), Ninnis (g), Moscow University (h) and Totten (i) ice shelves. All detected channels are further sub-categorized into slope-corrected channels which represent channels with maximum slopes < 15°. Only a subset of the slope-corrected channels is studied (‘studied channels`), namely those channels where the 90% percentile melt rate is > 10 m/yr, as they are considered to be ”active” melt-channels. Persistent polynya locations from ref. 24 are marked by red diamonds. Lettering corresponds to Extended Data Fig. 1. The solid black line denotes the BedMachine V3 grounding line43. All panels use MODIS50 as background imagery and are generated using Quantarctica51. The Quantarctica package is published under a Creative Commons Attribution 4.0 International License.
