Fig. 3: Water-column properties.
From: A West Antarctic grounding-zone environment shaped by episodic water flow
A plume of turbid water flows downstream in the upper portion of the grounding-zone channel. a, Channel cross section looking downstream determined using borehole altimeter profiling. Grey box denotes region of uncertainty due to lack of altimeter returns. b,c, Longitudinal (b) and transverse (c) mean current (dark blue) and individual cast current profiles overlain with 14-day fixed mooring velocities (mean and standard deviation (variability) shown in red). Currents are positive downstream and to the right when looking downstream. Legend in b shows timing of cross-section and current observations. d, Turbidity for each cast session. Legend shows timing of turbidity, temperature and salinity observations. e, Conservative temperature (Θ) of each cast session. f, Absolute salinity (SA) of each cast session. g, Volume fraction of subglacial discharge water (SGW, solid lines) and glacial meltwater (GMW, dashed lines). h, Temperature–salinity values coloured by the same colour scale as d. Dashed red line in h denotes Gade line38. Heavy dashed black line denotes freezing point at the base of the ice (channel apex), while heavy dashed grey line denotes freezing point at sea surface. Dotted black lines denote contours of potential density anomaly (σ0).
