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Siple Dome A (SDMA) Grain Orientation 640 - 790 Meters Data DOI: https://doi.org/10.7265/N53T9F5X Cite as Baker, I., Obbard, R., & Sieg, K. (2012) "Siple Dome A (SDMA) Grain Orientation 640 - 790 Meters" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.7265/N53T9F5X. AMD - DIF Record(s) NSIDC-0526_1 Abstract This data set characterizes the microstructure in ice cores, in particular the microstructural locations of impurities, grain orientations, and strain gradients. The fabric of polycrystalline ice is typically described using only the c-axis orientation, but this is insufficient for a full description of grain orientations in this hexagonal material. Thus, both the a-axis and c-axis are used in this data set showing pole figures for five depths of the Siple Dome (SDMA) core between 640 m and 790 m and misorientation angle distribution for the same grains. Creator(s): Baker, Ian; Obbard, Rachel; Sieg, Katherine Date Created: 2012-11-26 Repository: USAP-DC (current) - NSIDC (original) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: -148.82, East: -148.82, South: -81.66, North: -81.66 Temporal Extent(s) Start: 2009-01-15 - End: 2009-06-15 Award(s) NSF 0738975 Version: 1 Related Project(s) Advanced Microstructural Characterization of Polar Ice Cores References Iliescu, D., I. Baker, and H. Chang. 2004. Determining the Orientations of Ice Crystals Using Electron Backscatter Patterns. Microsc. Res. Techn., 63(4), 183 - 187. (doi:10.1002/jemt.20029) Obbard, R., I. Baker, and K. Sieg. 2006. Using Electron Backscatter Diffraction Patterns to Examine Recrystallization in Polar Ice Sheets. Journal of Glaciology, 52(179), 546 - 557. (doi:10.3189/172756506781828458) Rasband, W .S., Retzlaff, R. and C. R. Bentley. Image J Program. 2006. Bethesda, MA, National Institutes of Health. R. W. Obbard, K. E. Sieg, I. Baker, D. Meese. 2011. Microstructural Evolution in the Fine-graine Region of the Siple Dome Ice Core. Journal of Glaciology, 57(206):1046-1056. (doi:10.3189/002214311798843322) Keywords Antarctica Glaciers/ice Sheet Glaciology Sample/collection Description Siple Dome Siple Dome Ice Core South Pole WAISCORES