The Distribution of Stress and Velocity in Glaciers and Ice-Sheets

摘要: A block of ice resting upon a rough slope forms theoretical model glacier or an ice-sheet, the sides valley being ignored. Previous papers have described two types steady flow in this model: ( ) laminar flow, which longitudinal velocity gradient r is zero, and b extending compressive non-zero, was derived under assumption general law for ice, but only perfect plasticity. In present paper used throughout, equations with allowed to be are found. The previous results appear as special cases. Possible variations density, temperature depth for. If density known functions any region, if surface slope, velocity, value known, give stresses depth. borehole experiment on Jungfraufirn (1948-50) allows experimental test. From observed , Glen’s laboratory curve result calculated compared curve. At 50 m effect ignoring has been done hitherto, underestimate shear rate by factor 50; theory it overestimated 1∙33. remaining discrepancy probably mainly due sides.