Computation of driving stress across the Western GrIS’ ablation zone
This protocol is extracted from research article:
Sliding dominates slow-flowing margin regions, Greenland Ice Sheet
Sci Adv, Jul 10, 2019; DOI: 10.1126/sciadv.aaw5406

Driving stress across western GrIS’ ablation zone was calculated from Eq. 3 using a combination of CryoSAT ice sheet surface elevation (41) and bedrock topography (42). Ice thickness was computed by differencing the surface elevation and bed elevation datasets. Surface slopes were computed by smoothing the surface elevation using a weighted average incorporating neighboring grid cells. Gradients of the smoothed product were then computed using a centered difference with 2-km spacing.

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