Combining damage and fracture mechanics to model calving

摘要: Abstract. Calving of icebergs is a major negative component polar ice-sheet mass balance. Here we present new calving model relying on both continuum damage mechanics and linear elastic fracture mechanics. This combination accounts for the slow sub-critical surface crevassing rapid propagation crevasses when occurs. First, to ice occurs over long timescales enhances viscous flow ice. Then brittle fractures propagate downward, at very short timescales, body considered as an medium. The was calibrated Helheim Glacier, Southeast Greenland, well-monitored glacier with fast-flowing outlet. made it possible identify sets parameters enable consistent response produce dynamic equilibrium in agreement observed stable position front between 1930 today.