Increased flow speed on a large East Antarctic outlet glacier caused by subglacial floods
Stearns, L.A., B.E. Smith, G.S. Hamilton
Nature Geoscience, 1,
(see reprint for detailed figure captions)
Figure 1: Byrd Glacier ice velocity. a). Ice velocity along the profile in panel b). The black line represents the mean of pre-2005 ice velocities; the vertical bars represent the standard deviation of all pre-2005 velocities. b). A contour map of velocity change. c). Surface elevation from the ICESat DEM and bed topography from a 1978–1979 airborne survey.
Figure 2: Surface elevation change. a). ICESat elevations for 11 passes between 2003 - 2007. b). Elevation residuals for ICESat data after correction for topography. c). Map of elevation ranges and interpreted lake boundaries. d). Estimated lake volume displacements for the downstream lake (green), the upstream lake (blue) and the two lakes together (black). e). Ice speed at the grounding line from 2002 to 2008.
Figure 3: Hydraulic pressure. The black contours show hydrostatic pressure
(relative to pressure at the grounding line) at the base of Byrd Glacier. The
white contours show the ice surface elevation at 250m intervals.