Measurements and numerical simulation of fabric evolution along the Talos Dome ice core, Antarctica
We present measurements of fabrics and microstructures made along the Talos Dome ice core, a core drilled in East Antarctica in the framework of the TALDICE project. Fabric and average grain size data are analyzed regarding changes in climatic conditions. In particular, the fabric strength increases...
Published in: | Earth and Planetary Science Letters |
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2012
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Online Access: | https://epic.awi.de/id/eprint/31583/ https://doi.org/10.1016/j.epsl.2012.09.025 https://hdl.handle.net/10013/epic.40314 |
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ftawi:oai:epic.awi.de:31583 2024-09-15T17:45:40+00:00 Measurements and numerical simulation of fabric evolution along the Talos Dome ice core, Antarctica Montagnat, M. Buiron, D. Arnaud, L. Broquet, A. Schlitz, P. Jacob, R. Kipfstuhl, S. 2012 https://epic.awi.de/id/eprint/31583/ https://doi.org/10.1016/j.epsl.2012.09.025 https://hdl.handle.net/10013/epic.40314 unknown Montagnat, M. , Buiron, D. , Arnaud, L. , Broquet, A. , Schlitz, P. , Jacob, R. and Kipfstuhl, S. (2012) Measurements and numerical simulation of fabric evolution along the Talos Dome ice core, Antarctica , Earth and Planetary Science Letters, 357-35 , pp. 168-178 . doi:10.1016/j.epsl.2012.09.025 <https://doi.org/10.1016/j.epsl.2012.09.025> , hdl:10013/epic.40314 EPIC3Earth and Planetary Science Letters, 357-35, pp. 168-178, ISSN: 0012821X Article isiRev 2012 ftawi https://doi.org/10.1016/j.epsl.2012.09.025 2024-06-24T04:06:16Z We present measurements of fabrics and microstructures made along the Talos Dome ice core, a core drilled in East Antarctica in the framework of the TALDICE project. Fabric and average grain size data are analyzed regarding changes in climatic conditions. In particular, the fabric strength increases sharply going downward from Holocene to Wisconsin ice. Following (Durand et al., 2007), this change is associated with a positive feedback between variations in ice viscosity, due to variations in dust content, and the impact of a shear stress component, increasing with depth. A ViscoPlastic Self-Consistent modeling approach is used to simulate the fabric evolution for a “perfect dome” configuration. The discrepancies between the measured and the simulated fabrics highlight the depth ranges where shear strongly affects the fabric strengthening. Finally, the grain size and fabric analyses show the occurrence of dynamic recrystallization mechanisms (continuous and discontinuous) along the core. Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Earth and Planetary Science Letters 357-358 168 178 |
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Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We present measurements of fabrics and microstructures made along the Talos Dome ice core, a core drilled in East Antarctica in the framework of the TALDICE project. Fabric and average grain size data are analyzed regarding changes in climatic conditions. In particular, the fabric strength increases sharply going downward from Holocene to Wisconsin ice. Following (Durand et al., 2007), this change is associated with a positive feedback between variations in ice viscosity, due to variations in dust content, and the impact of a shear stress component, increasing with depth. A ViscoPlastic Self-Consistent modeling approach is used to simulate the fabric evolution for a “perfect dome” configuration. The discrepancies between the measured and the simulated fabrics highlight the depth ranges where shear strongly affects the fabric strengthening. Finally, the grain size and fabric analyses show the occurrence of dynamic recrystallization mechanisms (continuous and discontinuous) along the core. |
format |
Article in Journal/Newspaper |
author |
Montagnat, M. Buiron, D. Arnaud, L. Broquet, A. Schlitz, P. Jacob, R. Kipfstuhl, S. |
spellingShingle |
Montagnat, M. Buiron, D. Arnaud, L. Broquet, A. Schlitz, P. Jacob, R. Kipfstuhl, S. Measurements and numerical simulation of fabric evolution along the Talos Dome ice core, Antarctica |
author_facet |
Montagnat, M. Buiron, D. Arnaud, L. Broquet, A. Schlitz, P. Jacob, R. Kipfstuhl, S. |
author_sort |
Montagnat, M. |
title |
Measurements and numerical simulation of fabric evolution along the Talos Dome ice core, Antarctica |
title_short |
Measurements and numerical simulation of fabric evolution along the Talos Dome ice core, Antarctica |
title_full |
Measurements and numerical simulation of fabric evolution along the Talos Dome ice core, Antarctica |
title_fullStr |
Measurements and numerical simulation of fabric evolution along the Talos Dome ice core, Antarctica |
title_full_unstemmed |
Measurements and numerical simulation of fabric evolution along the Talos Dome ice core, Antarctica |
title_sort |
measurements and numerical simulation of fabric evolution along the talos dome ice core, antarctica |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/31583/ https://doi.org/10.1016/j.epsl.2012.09.025 https://hdl.handle.net/10013/epic.40314 |
genre |
Antarc* Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctica East Antarctica ice core |
op_source |
EPIC3Earth and Planetary Science Letters, 357-35, pp. 168-178, ISSN: 0012821X |
op_relation |
Montagnat, M. , Buiron, D. , Arnaud, L. , Broquet, A. , Schlitz, P. , Jacob, R. and Kipfstuhl, S. (2012) Measurements and numerical simulation of fabric evolution along the Talos Dome ice core, Antarctica , Earth and Planetary Science Letters, 357-35 , pp. 168-178 . doi:10.1016/j.epsl.2012.09.025 <https://doi.org/10.1016/j.epsl.2012.09.025> , hdl:10013/epic.40314 |
op_doi |
https://doi.org/10.1016/j.epsl.2012.09.025 |
container_title |
Earth and Planetary Science Letters |
container_volume |
357-358 |
container_start_page |
168 |
op_container_end_page |
178 |
_version_ |
1810493558242672640 |