Fig. 1: Ice speed, speed change and thinning over the Getz basin.
From: Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018
a Ice speed in the Getz drainage basin of Marie Byrd Land, measured in 2018 using Interferometric Wide (IW) mode synthetic aperture radar (SAR) data acquired by the Sentinel-1a/b satellites. The grounding line location (solid black line67), inland limit of the drainage basin (solid grey line) and the location of 14 flow line profiles (dashed black lines) are also shown. Profiles 1 to 9 are located on unnamed glaciers; however, 10 to 14 correspond to DeVicq, Berry, Venzke, Hull and Land Glaciers, respectively. Measurements are superimposed on BEDMAP2 bedrock topography32. b A map of the observed rate of change in ice speed between 1994 and 2018. c Ice sheet elevation change with Firn Densification Model (FDM) correction applied from 1992 to 2017, measured using satellite radar altimetry data8. The names of islands and ice rises (brown area) bordering the Getz Ice Shelf are also indicated. The calving front location is shown from 2009 in yellow to 2019 in purple, see Supplementary Fig. 7 for a zoom of the calving front change.
