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Deformation Microstructures in an Antarctic Ice Core (EDML) and in Experimentally Deformed Artificial Ice

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Title: Deformation Microstructures in an Antarctic Ice Core (EDML) and in Experimentally Deformed Artificial Ice
Authors: Weikusat, Ilka Browse this author
Kipfstuhl, Sepp Browse this author
Azuma, Nobuhiko Browse this author
Faria, Sérgio H. Browse this author
Miyamoto, Atsushi Browse this author
Keywords: low angle grain boundary
creep test
dynamic recrystallization
sublimation grooves
Issue Date: Dec-2009
Publisher: Institute of Low Temperature Science, Hokkaido University
Citation: Physics of Ice Core Records II : Papers collected after the 2nd International Workshop on Physics of Ice Core Records, held in Sapporo, Japan, 2-6 February 2007. Edited by Takeo Hondoh
Journal Title: 低温科学
Journal Title(alt): Low Temperature Science
Volume: 68
Issue: Supplement
Start Page: 115
End Page: 123
Abstract: Deformation microstructures in an Antarctic ice core (EDML) and in experimentally deformed artificial ice, which together comprise a great variety of conditions and parameters, are reconsidered and compared. Data presented here cover grain substructure and shape. Despite the different flow conditions surprising similarities in these observations indicate intracrystalline slip as the deformation carrier in natural as well as in experimentally deformed ice. Similar subgrain-boundary shapes and arrangements in both cases indicate characteristic types, which suggest that non-basal dislocations may play a significant role in the deformation of ice. Subgrain-boundary density and grain-boundary shapes show that a difference between processes in creep tests and in the Antarctic ice sheet is the efficiency of recovery and dynamic recrystallization.
Description: I. Microphysical properties, deformation, texture and grain growth
Type: bulletin (article)
Appears in Collections:低温科学 = Low Temperature Science > vol. 68, Supplement Issue

Submitter: 低温科学研究所図書室

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