Subglacial bed roughness of Greenland, provided using two independent metrics

  • Michael Cooper (Creator)
  • Thomas Jordan (Contributor)
  • Michael Cooper (Contributor)
  • Dustin M. Schroeder (Contributor)
  • Martin Siegert (Contributor)
  • Chris Williams (Contributor)
  • Jonathan L Bamber (Contributor)



These two files (.csv) provide independent methods of quantifying subglacial roughness in Greenland, both calculated from radio-echo sounding (or ice penetrating radar) data collected by the Operation Ice Bridge programme using CReSIS instrumentation. They are an output of the Basal Properties of Greenland (BPOG) project (, with funding from NERC grant NE/M000869/1. Roughness here, and in the wider literature, is defined as the variation in bed elevation (in the vertical) at the ice-bed interface, over a given length-scale. These two metrics calculate/quantify this variation in different ways: one shows topographic-scale roughness, calculated from the variation in along-track topography (bed elevation measurements derived from the radar pulse); and the other shows scattering-derived roughness, calculated from quantifying characteristics of each bed-echo (the return from the radar pulse at the ice-bed interface).
Date made available2 Feb 2018
PublisherPolar Data Centre, Natural Environment Research Council, UK
Date of data production1 Jan 1993 - 1 Jan 2016
Geographical coverageGreenland
Geospatial polygon60.0, 10.0, 90.0, -80.0

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