Abstract
Strain-rate measurements were carried out over eleven years on a firn pit 20 m deep in a temperate glacier. The stress strain-rate relation was applied in terms of invariants, because of the multiaxial state of stresses. The shear viscosity and the bulk viscosity were calculated as a function of depth and density. The result must be understood in terms of effective viscosities as the dependence of the viscosity from the state of stresses is unknown in this analysis.
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