Articles | Volume 17, issue 8
https://doi.org/10.5194/tc-17-3443-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-17-3443-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
23 Aug 2023
Research article |
| 23 Aug 2023
| 23 Aug 2023
Grain growth of natural and synthetic ice at 0 °C
Sheng Fan
CORRESPONDING AUTHOR
Department of Earth Sciences, University of Cambridge, Cambridge, UK
Department of Geology, University of Otago, Ōtepoti / Dunedin, Aotearoa / New Zealand
RSC, 93 The Terrace, Te Whanganui-a-Tara / Wellington, Aotearoa / New Zealand
David J. Prior
Department of Geology, University of Otago, Ōtepoti / Dunedin, Aotearoa / New Zealand
Brent Pooley
Department of Geology, University of Otago, Ōtepoti / Dunedin, Aotearoa / New Zealand
Hamish Bowman
Department of Geology, University of Otago, Ōtepoti / Dunedin, Aotearoa / New Zealand
Lucy Davidson
Department of Geology, University of Otago, Ōtepoti / Dunedin, Aotearoa / New Zealand
David Wallis
Department of Earth Sciences, University of Cambridge, Cambridge, UK
Sandra Piazolo
School of Earth and Environment, University of Leeds, Leeds, UK
Key Laboratory of Earth and Planetary Physics, Institute of Geology
and Geophysics, Chinese Academy of Sciences, Beijing, China
College of Earth and Planetary Sciences, University of Chinese
Academy of Sciences, Beijing, China
David L. Goldsby
Department of Earth and Environmental Science, University of
Pennsylvania, Philadelphia, PA, USA
Travis F. Hager
Department of Earth and Environmental Science, University of
Pennsylvania, Philadelphia, PA, USA
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Ice often exhibits a single-cluster fabric when deformed to high strains in glaciers and ice sheets. Using the equal-channel angular pressing technique, we achieved high shear strains in laboratory experiments and examined the fabrics. We investigated the evolutions of fabric and recrystallization mechanisms with strain. The results suggest that rotation recrystallization dominates fabric development when ice is deformed to high strains, explaining the fabrics found in natural ice.
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Morgan E. Monz, Peter J. Hudleston, David J. Prior, Zachary Michels, Sheng Fan, Marianne Negrini, Pat J. Langhorne, and Chao Qi
The Cryosphere, 15, 303–324, https://doi.org/10.5194/tc-15-303-2021, https://doi.org/10.5194/tc-15-303-2021, 2021
Short summary
Short summary
We present full crystallographic orientations of warm, coarse-grained ice deformed in a shear setting, enabling better characterization of how crystals in glacial ice preferentially align as ice flows. A commonly noted c-axis pattern, with several favored orientations, may result from bias due to overcounting large crystals with complex 3D shapes. A new sample preparation method effectively increases the sample size and reduces bias, resulting in a simpler pattern consistent with the ice flow.
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The Cryosphere, 14, 3875–3905, https://doi.org/10.5194/tc-14-3875-2020, https://doi.org/10.5194/tc-14-3875-2020, 2020
Short summary
Short summary
We performed uniaxial compression experiments on synthetic ice samples. We report ice microstructural evolution at –20 and –30 °C that has never been reported before. Microstructural data show the opening angle of c-axis cones decreases with increasing strain or with decreasing temperature, suggesting a more active grain rotation. CPO intensity weakens with temperature because CPO of small grains is weaker, and it can be explained by grain boundary sliding or nucleation with random orientations.
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Short summary
The microstructure of ice controls the behaviour of polar ice flow. Grain growth can modify the microstructure of ice; however, its processes and kinetics are poorly understood. We conduct grain-growth experiments on synthetic and natural ice samples at 0 °C. Microstructural data show synthetic ice grows continuously with time. In contrast, natural ice does not grow within a month. The inhibition of grain growth in natural ice is largely contributed by bubble pinning at ice grain boundaries.
The microstructure of ice controls the behaviour of polar ice flow. Grain growth can modify the...
