Unknown
PANGAEA
In:
Supplement to: Weikusat, Ilka; Kipfstuhl, Sepp; Faria, Sérgio H; Azuma, Nobuhiko; Miyamoto, Atsushi (2009): Subgrain boundaries and related microstructural features in EDML (Antarctica) deep ice core. Journal of Glaciology, 55(191), 461-472, https://doi.org/10.3189/002214309788816614
Publication Date:
2023-10-28
Description:
Subgrain boundaries revealed as shallow sublimation grooves on ice sample surfaces are a direct and easily observable feature of intracrystalline deformation and recrystallization. Statistical data obtained from the EPICA Dronning Maud Land (EDML) deep ice core drilled in East Antarctica cannot detect a depth region of increased subgrain-boundary formation. Grain-boundary morphologies show a strong influence of internal strain energy on the microstructure at all depths. The data do not support the classical view of a change of dominating recrystallization regimes with depth. Three major types of subgrain boundaries, reflecting high mechanical anisotropy, are specified in combination with crystal-orientation analysis.
Keywords:
EDML; EDRILL; EPICA; EPICA-Campaigns; EPICA drill; EPICA Dronning Maud Land, DML28C01_00; European Project for Ice Coring in Antarctica; Kohnen Station; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; SPP1158
Type:
Dataset
Format:
application/zip, 2 datasets
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