气候变化领域集成服务门户(CCPortal): EBSD analysis of subgrain boundaries and dislocation slip systems in Antarctic and Greenland ice

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.879614
	EBSD analysis of subgrain boundaries and dislocation slip systems in Antarctic and Greenland ice
	Weikusat; Ilka; Kuiper; Ernst-Jan N; Pennock; Gillian M; Kipfstuhl; Sepp; Drury; Martyn R
发布日期	2017-08-15
数据集类型	dataset
英文简介	Ice has a very high plastic anisotropy with easy dislocation glide on basal planes while glide on non-basal planes is much harder. Basal glide involves dislocations with Burgers vector b=, while glide on non-basal planes can involve dislocations with b=, b=[c] and b=. During natural ductile flow of polar ice sheets most of the deformation is expected to occur by basal slip accommodated by other processes including non-basal slip and grain boundary processes, however the importance of different accommodating processes is controversial. The recent application of micro-diffraction analysis methods to ice such as X-ray Laue diffraction and electron backscattered diffraction (EBSD) has demonstrated that subgrain boundaries indicative of non-basal slip are present in naturally deformed ice, although, so far the available data sets are limited. In this study we present an analysis of a large number of subgrain boundaries in ice core samples from one depth level from two deep ice cores, from Antarctica (EPICA-DML deep ice core at 656 m depth) and from the Greenland (NEEM deep ice core at 719 m depth).
空间范围	Median Latitude: 1.223750 * Median Longitude: -25.495800 * South-bound Latitude: -75.002500 * West-bound Longitude: -51.060000 * North-bound Latitude: 77.450000 * East-bound Longitude: 0.068400
时间范围	2001-01-10T00:00:00 - 2009-08-20T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	冰冻圈
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/213747
推荐引用方式 GB/T 7714	Weikusat,Ilka,Kuiper,et al. EBSD analysis of subgrain boundaries and dislocation slip systems in Antarctic and Greenland ice.2017-08-15.https://doi.org/10.1594/PANGAEA.879614.