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Deformation and flow of ice (co-organized)
Convener: Daniela Jansen  | Co-Conveners: Thomas Kleiner , Sina Marti 
 / Attendance Wed, 11 Apr, 17:30–19:00

This session focuses on the deformation and flow of ice comprising processes active on the microscale to large-scale flow organization. Understanding the flow behaviour is essential for realistic projections of the reaction of the cryosphere to changing climatic conditions. As it determines the resistance to flow of a glacier under its own weight, the flow properties significantly affect the rate of ice-sheet deglaciation and glacier response to changing climate on longer time scales. The flow regime within ice bodies can distort their internal structure and layering, which we need to understand in order to reconstruct palaeo-data. On the other hand these distortions can be interpreted as a recording of accumulated strain, revealing changes in the flow regime in the past. On shorter time scales the low viscosity of relatively warm sea ice can retard fracturing and calving. And with an increase in overall temperature of ice bodies caused by climate warming and melt water infiltration, enhanced deformation rates are expected in many glacial systems. We invite scientific contributions from the field, laboratory and from modeling, spanning from micro- to macro-scale, aimed to advance our understanding of (i) the different modes of deformation, (ii) how ice flow properties are influenced by parameters such as (but not limited to) fabric, texture, solute and particle impurities and water availability, (iii) the formation of structures such as folds and shear zones (vi) how ice flow properties contributes to the large scale dynamics in polar ice sheets, mountain glaciers, sea ice and planetary ice. Additionally, we seek to promote an interdisciplinary exchange between glaciologists and geologists. As ice deforms by processes similar to those observed in many rock-forming minerals, and structures such as folds and shear zones are both ubiquitous in deforming ice masses and high-grade metamorphic rocks, ice is sometimes referred to as an analogue material for high-temperature rock deformation in the geological community. We therefore would welcome any interdisciplinary exchange including (but of course not limited to) the glaciology-, geology- and rock deformation communities.