Creep in Columnar Ice: Insights from Laboratory Experiments and Simple Numerical Modelling
Ice deformation experiments and related numerical modelling are necessary to increase our understanding of ice sheet flow, which is of extreme importance in predicting sea level rise in relation to global warming and climate change. We present the results of high temperature (?5?) uniaxial shortening experiments and finite element modelling of ice forced through a constriction. In our experiments we applied constant loads to columnar ice polycrystals oriented with their column axis normal to the shortening direction. We deformed samples to several increments of strain, between 0% and 14%. At these conditions the crystallographic preferred orientation (CPO) of columnar ice evolves from a large circle CPO to a CPO where two clusters exist at ~30
123 pages A4, digital appendix with 3D models
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Tooley, Lauren, “Creep in Columnar Ice: Insights from Laboratory Experiments and Simple Numerical Modelling,” Otago Geology Theses, accessed January 23, 2018, http://theses.otagogeology.org.nz/items/show/642.