Articles | Volume 16, issue 5
https://doi.org/10.5194/tc-16-2009-2022
© Author(s) 2022. 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-16-2009-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
25 May 2022
Research article |
| 25 May 2022
| 25 May 2022
Can changes in deformation regimes be inferred from crystallographic preferred orientations in polar ice?
Maria-Gema Llorens
CORRESPONDING AUTHOR
Geosciencies Barcelona CSIC, Lluis Sole i Sabaris s/n, 08028
Barcelona, Spain
Albert Griera
Departament de Geologia, Universitat Autònoma de Barcelona, 08193
Cerdanyola del Vallès, Barcelona, Spain
Paul D. Bons
Department of Geosciences, Eberhard Karls University Tübingen,
Wilhemstr. 56, 72074 Tübingen, Germany
School of Earth Sciences and Resources, China University of Geosciences, Beijing, China
Ilka Weikusat
Department of Geosciences, Eberhard Karls University Tübingen,
Wilhemstr. 56, 72074 Tübingen, Germany
Alfred Wegener Institute Helmholtz Centre for Polar and Marine
Research, Bremerhaven, Germany
David J. Prior
Department of Geology, University of Otago, 362 Leith Street,
Dunedin 9016, New Zealand
Enrique Gomez-Rivas
Departament de Mineralogia, Petrologia i Geologia Aplicada,
Facultat de Ciències de la Terra, Universitat de Barcelona, Martí i
Franquès s/n, 08028 Barcelona, Spain
Tamara de Riese
Department of Geosciences, Eberhard Karls University Tübingen,
Wilhemstr. 56, 72074 Tübingen, Germany
Ivone Jimenez-Munt
Geosciencies Barcelona CSIC, Lluis Sole i Sabaris s/n, 08028
Barcelona, Spain
Daniel García-Castellanos
Geosciencies Barcelona CSIC, Lluis Sole i Sabaris s/n, 08028
Barcelona, Spain
Ricardo A. Lebensohn
Theoretical Division, Los Alamos National Laboratory, Los Alamos,
NM, 87545, USA
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Nicolas Stoll, Jan Eichler, Maria Hörhold, Tobias Erhardt, Camilla Jensen, and Ilka Weikusat
The Cryosphere, 15, 5717–5737, https://doi.org/10.5194/tc-15-5717-2021, https://doi.org/10.5194/tc-15-5717-2021, 2021
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We did a systematic analysis of the location of inclusions in the EGRIP ice core, the first ice core from an ice stream. We combine this with crystal orientation and grain size data, enabling the first overview about the microstructure of this unique ice core. Micro-inclusions show a strong spatial variability and patterns (clusters or horizontal layers); roughly one-third is located at grain boundaries. More holistic approaches are needed to understand deformation processes in the ice better.
Sebastian Hellmann, Melchior Grab, Johanna Kerch, Henning Löwe, Andreas Bauder, Ilka Weikusat, and Hansruedi Maurer
The Cryosphere, 15, 3507–3521, https://doi.org/10.5194/tc-15-3507-2021, https://doi.org/10.5194/tc-15-3507-2021, 2021
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In this study, we analyse whether ultrasonic measurements on ice core samples could be employed to derive information about the particular ice crystal orientation in these samples. We discuss if such ultrasonic scans of ice core samples could provide similarly detailed results as the established methods, which usually destroy the ice samples. Our geophysical approach is minimally invasive and could support the existing methods with additional and (semi-)continuous data points along the ice core.
Paul D. Bons, Tamara de Riese, Steven Franke, Maria-Gema Llorens, Till Sachau, Nicolas Stoll, Ilka Weikusat, Julien Westhoff, and Yu Zhang
The Cryosphere, 15, 2251–2254, https://doi.org/10.5194/tc-15-2251-2021, https://doi.org/10.5194/tc-15-2251-2021, 2021
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The modelling of Smith-Johnson et al. (The Cryosphere, 14, 841–854, 2020) suggests that a very large heat flux of more than 10 times the usual geothermal heat flux is required to have initiated or to control the huge Northeast Greenland Ice Stream. Our comparison with known hotspots, such as Iceland and Yellowstone, shows that such an exceptional heat flux would be unique in the world and is incompatible with known geological processes that can raise the heat flux.
Sebastian Hellmann, Johanna Kerch, Ilka Weikusat, Andreas Bauder, Melchior Grab, Guillaume Jouvet, Margit Schwikowski, and Hansruedi Maurer
The Cryosphere, 15, 677–694, https://doi.org/10.5194/tc-15-677-2021, https://doi.org/10.5194/tc-15-677-2021, 2021
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We analyse the orientation of ice crystals in an Alpine glacier and compare this orientation with the ice flow direction. We found that the crystals orient in the direction of the largest stress which is in the flow direction in the upper parts of the glacier and in the vertical direction for deeper zones of the glacier. The grains cluster around this maximum stress direction, in particular four-point maxima, most likely as a result of recrystallisation under relatively warm conditions.
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
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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.
Sheng Fan, Travis F. Hager, David J. Prior, Andrew J. Cross, David L. Goldsby, Chao Qi, Marianne Negrini, and John Wheeler
The Cryosphere, 14, 3875–3905, https://doi.org/10.5194/tc-14-3875-2020, https://doi.org/10.5194/tc-14-3875-2020, 2020
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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.
Cited articles
Alley, R. B.: Fabrics in polar ice sheets: development and prediction,
Science, 240, 493–495, 1988.
Azuma, N., Wang, Y., Mori, K., Narita, H., Hondoh, T., Shoji, H., and
Watanabe, O.: Textures and fabrics in the Dome F (Antarctica) ice core,
Ann. Glaciol., 29, 163–168, 1999.
Bachmann, F., Hielscher, R., and Schaeben, H.: Grain detection from 2d and 3d
EBSD data – Specification of the MTEX algorithm, Ultramicroscopy, 111, 1720–1733, 2011.
Behn, M. D., Goldsby, D. L., and Hirth, G.: The role of grain size evolution in the rheology of ice: implications for reconciling laboratory creep data and the Glen flow law, The Cryosphere, 15, 4589–4605, https://doi.org/10.5194/tc-15-4589-2021, 2021.
Boneh, Y. and Skemer, P.: The effect of deformation history on the evolution
of olivine CPO, Earth Planet. Sc. Lett., 406, 213–222, 2014.
Bons, P. D., Koehn, D., and Jessell, M. W.: Microdynamic Simulation, Lecture
Notes in Earth Sciences 106, Springer, Berlin, 405 pp., 2008.
Bons, P. D., Kleiner, T., Llorens, M. G., Prior, D. J., Sachau, T., Weikusat,
I., and Jansen, D.: Greenland Ice Sheet: Higher nonlinearity of ice flow
significantly reduces estimated basal motion, Geophys. Res. Lett.,
45, 6542–6548, 2018.
Budd, W. and Jacka, T.: A review of ice rheology for ice sheet modelling,
Cold Reg. Sci. Technol., 16, 107–144, https://doi.org/10.1016/0165-232X(89)90014-1, 1989.
Budd, W. F., Warner, R. C., Jacka, T. H., 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, 2013.
Castelnau, O., Shoji, H., Mangeney, A., Milsch, H., Duval, P., Miyamoto, A.,
Kawada, K., and Watanabe, O.: Anisotropic behavior of GRIP ices and flow in
central Greenland, Earth Planet. Sc. Lett., 154,
307–322, 1998.
Craw, L., Qi, C., Prior, D. J., Goldsby, D. L., and Kim, D.: Mechanics and
microstructure of deformed natural anisotropic ice, J. Struct. Geol., 115,
152–166, 2018.
Craw, L., Treverrow, A., Fan, S., Peternell, M., Cook, S., McCormack, F., and Roberts, J.: The temperature change shortcut: effects of mid-experiment temperature changes on the deformation of polycrystalline ice, The Cryosphere, 15, 2235–2250, https://doi.org/10.5194/tc-15-2235-2021, 2021.
Cuffey, K. M. and Paterson, W. S. B.: The physics of glaciers, Academic Press, 4th Edn., ISBN 9780123694614, 2010.
Dahl-Jensen, D., Thorsteinsson, T., Alley, R., and Shoji, H.: Flow properties
of the ice from the Greenland Ice Core Project ice core: the reason for
folds?, J. Geophys. Res.-Oceans, 102, 26831–26840,
1997.
Di Leo, J. F., Walker, A. M., Li, Z. H., Wookey, J., Ribe, N. M., Kendall, J. M.,
and Tommasi, A.: Development of texture and seismic anisotropy during the
onset of subduction, Geochem. Geophy. Geosy., 15, 192–212, 2014.
Durand, G., Gillet-Chaulet, F., Svensson, A., Gagliardini, O., Kipfstuhl, S., Meyssonnier, J., Parrenin, F., Duval, P., and Dahl-Jensen, D.: Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core, Clim. Past, 3, 155–167, https://doi.org/10.5194/cp-3-155-2007, 2007.
Duval, P. and Castelnau, O.: Dynamic recrystallization of ice in polar ice
sheets, J. Phys. IV, 5, 197–205, 1995.
Duval, P., Ashby, M. F., and Anderman, I.: Rate-controlling processes in the
creep of polycrystalline ice, J. Phys. Chem., 87,
4066–4074, 1983.
Edwards, T. L., Nowicki, S., Marzeion, B., Hock, R., Goelzer, H., Seroussi,
H., Jourdain, N. C., Slater, D. A., Turner, F. E., Smith, C. J., and McKenna,
C. M.: Projected land ice contributions to twenty-first-century sea level
rise, Nature, 593, 74–82, 2021.
ELLE International Consortium: ELLE Numerical Simulation Platform, https://git.code.sf.net/p/elle/gitelle-git (last access: 23 May 2022), 2018.
Fan, S., Hager, T. F., Prior, D. J., Cross, A. J., Goldsby, D. L., Qi, C., Negrini, M., and Wheeler, J.: Temperature and strain controls on ice deformation mechanisms: insights from the microstructures of samples deformed to progressively higher strains at −10, −20 and −30 ∘C, The Cryosphere, 14, 3875–3905, https://doi.org/10.5194/tc-14-3875-2020, 2020.
Fan, S., Cross, A. J., Prior, D. J., Goldsby, D. L., Hager, T. F., Negrini, M. and Qi, C.: Crystallographic Preferred Orientation (CPO) Development Governs Strain Weakening in Ice: Insights From High‐Temperature Deformation Experiments, J. Geophys. Res.-Sol. Ea., 126, e2021JB023173, https://doi.org/10.1029/2021JB023173, 2021.
Faria, S. H., Weikusat, I., and Azuma, N.: The microstructure of polar ice.
Part I: Highlights from ice core research, J. Struct. Geol., 61, 2–20,
https://doi.org/10.1016/j.jsg.2013.09.010, 2014.
Gerbi, C., Mills, S., Clavette, R., Campbell, S., Bernsen, S.,
Clemens-Sewall, D., Lee, I., Hawley, R., Kreutz, K., and Hruby, K.
Microstructures in a shear margin: Jarvis Glacier, Alaska, J.
Glaciol., 67, 1163–1176, 2021.
Golledge, N. R., Kowalewski, D. E., Naish, T. R., Levy, R. H., Fogwill, C.
J., and Gasson, E. G. W.: The multi-millennial Antarctic commitment to future
sea-level rise, Nature, 526, 421–425, https://doi.org/10.1038/nature15706, 2015.
Griera, A., Llorens, M. G., Gomez-Rivas, E., Bons, P. D., Jessell, M. W.,
Evans, L. A., and Lebensohn, R.: Numerical modelling of porphyroclast and
porphyroblast rotation in anisotropic rocks, Tectonophysics, 587, 4–29,
2013.
Gomez-Rivas, E., Griera, A., Llorens, M. G., Bons, P. D., Lebensohn, R. A., and
Piazolo, S.: Subgrain rotation recrystallization during shearing: insights
from full-field numerical simulations of halite polycrystals, J.
Geophys. Res.-Sol. Ea., 122, 8810–8827, 2017.
Gow, A. J., Meese, D. A., Alley, R. B., Fitzpatrick, J. J., Anandakrishnan, S.,
Woods, G. A., and Elder, B. C.: Physical and structural properties of the
Greenland Ice Sheet Project 2 ice core: A review, J. Geophys. Res.-Oceans, 102, 26559–26575,
1997.
Haefeli, R.: Contribution to the movement and the form of ice sheets in the
Arctic and Antarctic, J. Glaciol., 3, 1133–1151, 1961.
Hudleston, P. J.: Similar folds, recumbent folds, and gravity tectonics in ice and rocks, J. Geol., 85, 113–122, 1977.
Hudleston, P. J.: Structures and fabrics in glacial ice: a review, J.
Struct. Geol., 81, 1–27, 2015.
Jacka, T. H. and Maccagnan, M.: Ice crystallographic and strain rate changes
with strain in compression and extension, Cold Reg. Sci. Technol., 8, 269–286, 1984.
Jacka, T. H. and Li, J.: Flow rates and crystal orientation fabrics in compression of polycrystalline ice at low temperatures and stresses, in: International Symposium on Physics of Ice Core Records, edited by: Hondoh, T., Shikotsukohan, Hokkaido, Japan, 14–17 September 1998, 83–102, 2000.
Jackson, M. and Kamb, B.: The marginal shear stress of Ice Stream B, West
Antarctica, J. Glaciol., 43, 415–426, 1997.
Jansen, D., Llorens, M.-G., Westhoff, J., Steinbach, F., Kipfstuhl, S., Bons, P. D., Griera, A., and Weikusat, I.: Small-scale disturbances in the stratigraphy of the NEEM ice core: observations and numerical model simulations, The Cryosphere, 10, 359–370, https://doi.org/10.5194/tc-10-359-2016, 2016.
Jennings, S. J. A. and Hambrey, M. J.: Structures and deformation in
glaciers and ice sheets, Rev. Geophys., 59, e2021RG000743, https://doi.org/10.1029/2021RG000743, 2021.
Joughin, I. A. N., Smith, B. E., and Howat, I. M.: A complete map of Greenland ice
velocity derived from satellite data collected over 20 years, J.
Glaciol., 64, 1–11, 2018.
Journaux, B., Chauve, T., Montagnat, M., Tommasi, A., Barou, F., Mainprice, D., and Gest, L.: Recrystallization processes, microstructure and crystallographic preferred orientation evolution in polycrystalline ice during high-temperature simple shear, The Cryosphere, 13, 1495–1511, https://doi.org/10.5194/tc-13-1495-2019, 2019.
Jun, L. and Jacka, T. H.: Horizontal shear rate of ice initially exhibiting
vertical compression fabrics, J. Glaciol., 44, 670–672,
1998.
Kamb, W. B.: Experimental recrystallization of ice under stress, in: Flow and Fracture of Rocks, edited by: Heard, H. C., Borg, I. Y., Carter, N. L., and Rayleigh, C. B., American Geophysical Union, 211–242, 1972.
Kaminski, E., Ribe, N. M., and Browaeys, J. T.: D-Rex, a program for calculation
of seismic anisotropy due to crystal lattice preferred orientation in the
convective upper mantle, Geophys. J. Int., 158,
744-752, 2004.
Katayama, I. and Karato, S. I.: Effect of temperature on the B-to C-type
olivine fabric transition and implication for flow pattern in subduction
zones, Phys. Earth Planet. Int., 157, 33–45,
2006.
Kim, D., Prior, D. J., Han, Y., Qi, C., Han, H., and Ju, H. T.: Microstructures
and Fabric Transitions of Natural Ice from the Styx Glacier, Northern
Victoria Land, Antarctica, Minerals, 10, 892, https://doi.org/10.3390/min10100892, 2020.
Lebensohn, R. A. and Rollett, A. D.: Spectral methods for full-field
micromechanical modelling of polycrystalline materials, Comput.
Mater. Sci., 173, 109336, https://doi.org/10.1016/j.commatsci.2019.109336, 2020.
Li, Z. H., Di Leo, J. F., and Ribe, N. M.: Subduction-induced mantle flow,
finite strain, and seismic anisotropy: Numerical modeling, J.
Geophys. Res.-Sol. Ea., 119, 5052–5076, 2014.
Lipenkov, V. Y., Barkov, N. I., Duval, P. and Pimienta, P.: Crystalline texture of the 2083 m ice core at Vostok Station, Antarctica, J. Glaciol., 35, 392–398, 1989.
Llorens, M. G., Griera, A., Bons, P. D., Roessiger, J., Lebensohn, R.,
Evans, L., and Weikusat, I. Dynamic recrystallisation of ice aggregates
during co-axial viscoplastic deformation: a numerical approach, J.
Glaciol., 62, 359–377, 2016a.
Llorens, M. G., Griera, A., Bons, P. D., Lebensohn, R. A., Evans, L. A.,
Jansen, D., and Weikusat, I.: Full field predictions of ice dynamic
recrystallisation under simple shear conditions, Earth Planet. Sc.
Lett., 450, 233–242, 2016b.
Llorens, M. G., Griera, A., Steinbach, F., Bons, P. D., Gomez-Rivas, E.,
Jansen, D., Roessiger, J., Lebensohn, R. A., and Weikusat, I.: Dynamic
recrystallization during deformation of polycrystalline ice: insights from
numerical simulations, Philos. T. R. Soc. A, 375, 20150346, https://doi.org/10.1098/rsta.2015.0346, 2017.
Llorens, M. G., Griera, A., Bons, P. D., Gomez-Rivas, E., Weikusat, I., Prior,
D. J., Kerch, J., and Lebensohn, R. A.: Seismic anisotropy of temperate ice in
polar ice sheets, J. Geophys. Res.-Earth, 125, e2020JF005714, https://doi.org/10.1029/2020JF005714, 2020.
Llorens, M.-G., Griera, A., Bons, P. D., Weikusat, I., Prior, D. J., Gómez-Rivas, E., de Riese, T., Jimenez-Munt, I., García-Castellanos, D., and Lebensohn, R. A.: Full-field numerical simulations of ice
viscoplastic deformation during two deformation events, DIGITAL.CSIC [data set], https://doi.org/10.20350/digitalCSIC/14643, 2022.
LeDoux, C. M., Hulbe, C. L., Forbes, M. P., Scambos, T. A., and Alley, K.:
Structural provinces of the ross ice shelf, antarctica, Ann.
Glaciol., 58, 88–98, 2017.
Lilien, D. A., Rathmann, N. M., Hvidberg, C. S., and Dahl-Jensen, D.: Modeling
Ice-Crystal Fabric as a Proxy for Ice-Stream Stability, J.
Geophys. Res.-Earth, 126, e2021JF006306, https://doi.org/10.1029/2021JF006306, 2021.
Lipenkov, V. Y., Barkov, N. I., Duval, P., and Pimienta, P.: Crystalline Texture
of the 2083 m Ice Core at Vostok Station, Antarctica, J. Glaciol., 35,
392–398, 1989.
Llorens, M.-G., Griera, A., Bons, P. D., Weikusat, I., Prior, D. J., Gómez-Rivas, E., de Riese, T., Jimenez-Munt, I., García-Castellanos, D., and Lebensohn, R. A.: Full-field numerical simulations of ice viscoplastic deformation during two deformation events, DIGITAL.CSIC [data set], https://doi.org/10.20350/digitalCSIC/14643, 2022.
Lutz, F., Eccles, J., Prior, D. J., Craw, L., Fan, S., Hulbe, C., Forbes, M.,
Still, H., Pyne, A., and Mandeno, D.: Constraining Ice Shelf Anisotropy Using
Shear Wave Splitting Measurements from Active-Source Borehole Seismics,
J. Geophys. Res.-Earth, 125, e2020JF005707, https://doi.org/10.1029/2020JF005707,
2020.
Lutz, F., Prior, D. J., Still, H., Bowman, M. H., Boucinhas, B., Craw, L., Fan, S., Kim, D., Mulvaney, R., Thomas, R. E., and Hulbe, C. L.: Ultrasonic and seismic constraints on crystallographic preferred orientations of the Priestley Glacier shear margin, Antarctica, The Cryosphere Discuss. [preprint], https://doi.org/10.5194/tc-2021-382, in review, 2022.
Millstein, J., Minchew, B., and Pegler, S. S.: Reassessing the flow law of
glacier ice using satellite observations, Commun. Earth Environ., 3, 1–7, https://doi.org/10.31223/X5D32X, 2021.
Montagnat, M., Blackford, J. R., Piazolo, S., Arnaud, L., and Lebensohn, R. A.:
Measurements and full-field predictions of deformation heterogeneities in
ice, Earth Planet. Sc. Lett., 305, 153–160, https://doi.org/10.1016/j.epsl.2011.02.050, 2011.
Montagnat, M., Buiron, D., Arnaud, L., Broquet, A., Schlitz, P., Jacob, R.,
and Kipfstuhl, S.: Measurements and numerical simulation of fabric evolution
along the Talos Dome ice core, Antarctica, Earth Planet. Sc. Lett., 357, 168–178, 2012.
Montagnat, M., Azuma, N., Dahl-Jensen, D., Eichler, J., Fujita, S., Gillet-Chaulet, F., Kipfstuhl, S., Samyn, D., Svensson, A., and Weikusat, I.: Fabric along the NEEM ice core, Greenland, and its comparison with GRIP and NGRIP ice cores, The Cryosphere, 8, 1129–1138, https://doi.org/10.5194/tc-8-1129-2014, 2014a.
Montagnat, M., Castelnau, O., Bons, P. D., Faria, S. H., Gagliardini, O.,
Gillet-Chaulet, F., Grennerat, F., Griera, A., Lebensohn, R. A., Moulinec,
H., Roessiger, J., and Suquet, P.: Multiscale modeling of ice deformation
behavior, J. Struct. Geol., 61, 78–108,
https://doi.org/10.1016/j.jsg.2013.05.002, 2014b.
Montagnat, M., Chauve, T., Barou, F., Tommasi, A., Beausir, B., and
Frassengeas, C.: Analysis of dynamic recrystallisation of ice from EBSD
orientation mapping, Front. Earth Sci., 3, 13, https://doi.org/10.3389/feart.2015.00081, 2015.
Monz, M. E., Hudleston, P. J., Prior, D. J., Michels, Z., Fan, S., Negrini, M., Langhorne, P. J., and Qi, C.: Full crystallographic orientation (c and a axes) of warm, coarse-grained ice in a shear-dominated setting: a case study, Storglaciären, Sweden, The Cryosphere, 15, 303–324, https://doi.org/10.5194/tc-15-303-2021, 2021.
Nerem, R. S., Beckley, B. D., Fasullo, J. T., Hamlington, B. D., Masters, D., and
Mitchum, G. T.: Climate-change–driven accelerated sea-level rise detected in
the altimeter era, P. Natl. Acad. Sci. USA, 115,
2022–2025, 2018.
Passchier, C. W.: Reconstruction of deformation and flow parameters from
deformed vein sets, Tectonophysics, 180, 185–199, 1990.
Peternell, M. and Wilson, C. J.: Effect of strain rate cycling on
microstructures and crystallographic preferred orientation during
high-temperature creep, Geology, 44, 279–282, 2016.
Piazolo, S., Bons, P. D., Griera, A., Llorens, M. G., Gomez-Rivas, E., Koehn,
D., Wheeler, J., Gardner, R., Godinho, J. R., Evans, L., and Lebensohn, R. A.: A
review of numerical modelling of the dynamics of microstructural development
in rocks and ice: Past, present and future, J. Struct. Geol.,
125, 111–123, 2019.
Qi, C., Goldsby, D. L., and Prior, D. J.: The down-stress transition from
cluster to cone fabrics in experimentally deformed ice, Earth Planet.
Sc. Lett., 471, 136–147, 2017.
Qi, C., Prior, D. J., Craw, L., Fan, S., Llorens, M.-G., Griera, A., Negrini, M., Bons, P. D., and Goldsby, D. L.: Crystallographic preferred orientations of ice deformed in direct-shear experiments at low temperatures, The Cryosphere, 13, 351–371, https://doi.org/10.5194/tc-13-351-2019, 2019.
Richards, D. H., Pegler, S. S., Piazolo, S., and Harlen, O. G.: The evolution of
ice fabrics: A continuum modelling approach validated against laboratory
experiments, Earth Planet. Sc. Lett., 556, 116718, https://doi.org/10.1016/j.epsl.2020.116718, 2021.
Skemer, P., Katayama, I., Jiang, Z., and Karato, S. I.: The misorientation
index: Development of a new method for calculating the strength of
lattice-preferred orientation, Tectonophysics, 411, 157–167, 2005.
Smith, E. C., Baird, A. F., Kendall, J. M., Martín, C., White, R. S., Brisbourne, A. M., and Smith, A. M.: Ice fabric in an Antarctic ice stream interpreted from seismic anisotropy, Geophys. Res. Lett., 44, 3710–3718, 2017.
Steinbach, F., Bons, P. D., Griera, A., Jansen, D., Llorens, M.-G., Roessiger, J., and Weikusat, I.: Strain localization and dynamic recrystallization in the ice–air aggregate: a numerical study, The Cryosphere, 10, 3071–3089, https://doi.org/10.5194/tc-10-3071-2016, 2016.
Thomas, R. E., Negrini, M., Prior, D. J., Mulvaney, R., Still, H., Bowman,
M. H., Craw, L., Fan, S., Hubbard, B., Hulbe, C., Kim, D., and Lutz, F.:
Microstructure and Crystallographic Preferred Orientations of an Azimuthally
Oriented Ice Core from a Lateral Shear Margin: Priestley Glacier,
Antarctica, Front. Earth Sci., 9, 1084, https://doi.org/10.3389/feart.2021.702213, 2021.
Thorsteinsson, T., Kipfstuhl, J., and Miller, H.: Textures and fabrics in the
GRIP ice core, J. Geophys. Res.-Ocean, 102, 26583–26599, 1997.
Thorsteinsson, T., Waddington, E. D., and Fletcher, R. C.: Spatial and temporal
scales of anisotropic effects in ice-sheet flow, Ann. Glaciol., 37, 40–48, 2003.
Treverrow, A., Budd, W. F., Jacka, T. H., amd Warner, R. C.: The tertiary creep of
polycrystalline ice: experimental evidence for stress dependent levels of
strain rate enhancement, J. Glaciol., 58, 301–314, https://doi.org/10.3189/2012JoG11J149, 2012.
Vaughan, M. J., Prior, D. J., Jefferd, M., Brantut, N., Mitchell, T. M., and
Seidemann, M.: Insights into anisotropy development and weakening of ice from
in situ P wave velocity monitoring during laboratory creep, J.
Geophys. Res.-Sol. Ea., 122, 7076–7089, 2017.
Voigt, D. E.: c-Axis Fabric of the South Pole Ice Core, SPC14, U.S. Antarctic
Program (USAP) Data Center [data set], https://doi.org/10.15784/601057, 2017.
Vollmer, F. W.: An application of eigenvalue methods to structural domain
analysis, Geol. Soc. Am. Bull., 102, 786–791, 1990.
Young, N. W. and Hyland, G.: Velocity and strain rates derived from InSAR
analysis over the Amery Ice Shelf, East Antarctica, Ann. Glaciol.,
34, 228–234, 2002.
Wang, Y., Thorsteinsson, T., Kipfstuhl, J., Miller, H., Dahl-Jensen, D., and Shoji, H.: A vertical girdle fabric in the NorthGRIP deep ice core, North Greenland, Ann. Glaciol., 35, 515–520, https://doi.org/10.3189/172756402781817301, 2002.
Weikusat, I., Jansen, D., Binder, T., Eichler, J., Faria, S. H., Wilhelms,
F., Kipfstuhl, S., Sheldon, S., Miller, H., Dahl-Jensen, D., and Kleiner, T.:
Physical analysis of an Antarctic ice core – towards an integration of
micro-and macrodynamics of polar ice, Philos. T.
R. Soc. A, 375, 20150347, https://doi.org/10.1098/rsta.2015.0347, 2017.
Wilson, C. J., Peternell, M., Hunter, N. J., and Luzin, V.: Deformation of
polycrystalline D2O ice: Its sensitivity to temperature and strain-rate as
an analogue for terrestrial ice, Earth Planet. Sc. Lett., 532,
115999, https://doi.org/10.1016/j.epsl.2019.115999, 2020.
Wilson, C. J. L.: Fabrics in polycrystalline ice deformed experimentally at
−108 ∘C, Cold Reg. Sci. Technol., 6, 149–161, 1982.
Wilson, C. J. L. and Peternell, M. A.: Ice deformed in compression and simple
shear: control of temperature and initial fabric, J. Glaciol., 58, 11–22, 2012.
Short summary
Polar ice is formed by ice crystals, which form fabrics that are utilised to interpret how ice sheets flow. It is unclear whether fabrics result from the current flow regime or if they are inherited. To understand the extent to which ice crystals can be reoriented when ice flow conditions change, we simulate and evaluate multi-stage ice flow scenarios according to natural cases. We find that second deformation regimes normally overprint inherited fabrics, with a range of transitional fabrics.
Polar ice is formed by ice crystals, which form fabrics that are utilised to interpret how ice...
