Fig. 1: Integrated ROV observations illuminate ice, ocean and seafloor connections in a recently ungrounded region along the KIS coast.
From: Crevasse refreezing and signatures of retreat observed at Kamb Ice Stream grounding zone
The background contour shows Conservative Temperature (Θ), with white contour lines indicating temperature difference from the freezing point (Θ – Θfp). Imagery insets (Supplementary Videos 1–4 and Extended Data Fig. 4) are as follows: a, 1.30-m-wide marine ice formations; b,e, ~0.65-m-wavelength, ~5-cm-amplitude ripples in meteoric ice; c, centimetre-scale grain boundaries in basal ice; d, layers of sediment-laden basal ice; f, 3.50 -m-wide incised runnels; g, 0.55- to 0.60-m-wide dimpled meteoric ice; h,l, ~0.10-m-wavelength seafloor ripples; i, smooth seafloor below basal ice; j, centimetre-scale clasts; k, sonar image of a 20-m-wide crevasse imprint. This transect is generated from the outbound legs of the second (upstream) and third (downstream) missions, which occurred 63 hours apart at reciprocal headings (see map inset and Extended Data Fig. 2). Data are interpolated between white points (the vehicle track), and grey points indicate ocean data filtered out due to aberrant conductivity readings. Elevation is metres below local sea level; distance is reported relative to the previously mapped GL position6. P1–P8 correspond to sections plotted as profiles in Fig. 2; 10× vertical exaggeration.
