Articles | Volume 19, issue 9
https://doi.org/10.5194/tc-19-3805-2025
© Author(s) 2025. 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-19-3805-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| Highlight paper
| 
15 Sep 2025
Research article | Highlight paper |
| 15 Sep 2025
| 15 Sep 2025
Linking crystallographic orientation and ice stream dynamics: evidence from the EastGRIP ice core
Nicolas Stoll
Department of Geosciences, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Department of Environmental Sciences, Informatics and Statistics, Ca'Foscari University of Venice, Venice, Italy
Department of Earth and Space Sciences, University of Washington, Seattle, USA
Department of Geosciences, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Geoscience Department, Eberhard Karls University, Tübingen, Germany
Daniela Jansen
Department of Geosciences, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Paul Bons
Geoscience Department, Eberhard Karls University, Tübingen, Germany
Kyra Darányi
Department of Geosciences, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Geoscience Department, Eberhard Karls University, Tübingen, Germany
Department of Earth Sciences, Utrecht University, Utrecht, the Netherlands
Julien Westhoff
Physics of Ice, Climate and Earth, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
María-Gema Llorens
GEO3BCN-CSIC, Lluís Solé Sabarís s/n, 08028 Barcelona, Spain
David Wallis
Department of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, UK
Jan Eichler
Department of Geosciences, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement (LGL-TPE), ENS Lyon, Université Claude Bernard Lyon 1, CNRS, Villeurbanne, France
Tomotaka Saruya
National Institute of Polar Research, Tokyo 190-8518, Japan
Tomoyuki Homma
Department of Mechanical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka-machi, Nagaoka 940-2188, Japan
Sune Olander Rasmussen
Physics of Ice, Climate and Earth, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
Giulia Sinnl
Physics of Ice, Climate and Earth, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
Anders Svensson
Physics of Ice, Climate and Earth, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
Martyn Drury
Department of Earth Sciences, Utrecht University, Utrecht, the Netherlands
Frank Wilhelms
Department of Geosciences, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Geoscience Centre, University of Göttingen, Göttingen, Germany
Sepp Kipfstuhl
Department of Geosciences, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Dorthe Dahl-Jensen
Physics of Ice, Climate and Earth, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada
Johanna Kerch
Department of Geosciences, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Geoscience Centre, University of Göttingen, Göttingen, Germany
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Co-editor-in-chief
The orientation and size of ice crystals play a crucial role in the movement of ice and, consequently, how ice sheets and glaciers respond to changes in climate. In this study, results from the analysis of the ice crystal fabric of the EastGRIP ice core are presented. This is the first ice core to be collected in an ice stream, uniquely addressing issues related to ice dynamics. As a result, the work provides new insights into the processes, kinematics, and conditions within an ice stream, greatly advancing our understanding of fast-flowing ice streams.
The orientation and size of ice crystals play a crucial role in the movement of ice and,...
Short summary
A better understanding of ice flow requires more observational data. The EastGRIP core is the first ice core through an active ice stream. We discuss crystal orientation data determining the present deformation regimes. A comparison with other deep cores shows the unique properties of EastGRIP and shows that deep ice likely originates from the Eemian. We further show that the overall plug flow of NEGIS is characterised by many small-scale variations, which remain to be considered in ice flow models.
A better understanding of ice flow requires more observational data. The EastGRIP core is the...
