Articles | Volume 16, issue 8
https://doi.org/10.5194/tc-16-3313-2022
https://doi.org/10.5194/tc-16-3313-2022
Research article
 | 
24 Aug 2022
Research article |  | 24 Aug 2022

Ultrasonic and seismic constraints on crystallographic preferred orientations of the Priestley Glacier shear margin, Antarctica

Franz Lutz, David J. Prior, Holly Still, M. Hamish Bowman, Bia Boucinhas, Lisa Craw, Sheng Fan, Daeyeong Kim, Robert Mulvaney, Rilee E. Thomas, and Christina L. Hulbe

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Cited articles

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Bentley, C. R.: Seismic Anisotropy in the West Antarctic Ice Sheet, in: Antarctic Snow and Ice Studies II, edited by: Crary, A., American Geophysical Union, 131–177, https://doi.org/10.1029/AR016p0131, 1971. a
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Bouchez, J. and Duval, P.: The Fabric of Polycrystalline Ice Deformed in Simple Shear: Experiments in Torsion, Natural Deformation and Geometrical Interpretation, Texture, Stress, and Microstructure, 5, 753730, https://doi.org/10.1155/TSM.5.171, 1982. a
Budd, W. F., Warner, R. C., Jacka, T., Li, J., and Treverrow, A.: Ice flow relations for stress and strain-rate components from combined shear and compression laboratory experiments, J. Glaciol., 59, 374–392, https://doi.org/10.3189/2013JoG12J106, 2013. a
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Ice crystal alignment in the sheared margins of fast-flowing polar ice is important as it may control the ice sheet flow rate, from land to the ocean. Sampling shear margins is difficult because of logistical and safety considerations. We show that crystal alignments in a glacier shear margin in Antarctica can be measured using sound waves. Results from a seismic experiment on the 50 m scale and from ultrasonic experiments on the decimetre scale match ice crystal measurements from an ice core.
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