Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL072093 |
Ice fabric in an Antarctic ice stream interpreted from seismic anisotropy | |
Smith, Emma C.1,2,3; Baird, Alan F.4; Kendall, J. Michael4; Martin, Carlos1; White, Robert S.2; Brisbourne, Alex M.1; Smith, Andrew M.1 | |
2017-04-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Germany |
英文摘要 | Here we present new measurements of an anisotropic ice fabric in a fast moving (377ma(-1)) ice stream in West Antarctica. We use similar to 6000 measurements of shear wave splitting observed in microseismic signals from the bed of Rutford Ice Stream, to show that in contrast to large-scale ice flow models, which assume that ice is isotropic, the ice in Rutford Ice Stream is dominated by a previously unobserved type of partial girdle fabric. This fabric has a strong directional contrast in mechanical properties, shearing 9.1 times more easily along the ice flow direction than across flow. This observed fabric is likely to be widespread and representative of fabrics in other ice streams and large glaciers, suggesting it is essential to consider anisotropy in data-driven models to correctly predict ice loss and future flow in these regions. We show how passive microseismic monitoring can be effectively used to provide these data. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401847500032 |
WOS关键词 | POLYCRYSTALLINE ICE ; MANTLE DEFORMATION ; WEST ANTARCTICA ; FLOW-LAW ; SHEET ; MICROSTRUCTURE ; ELASTICITY ; RETREAT |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27546 |
专题 | 气候变化 |
作者单位 | 1.British Antarctic Survey, NERC, Cambridge, England; 2.Univ Cambridge, Dept Earth Sci, Bullard Labs, Cambridge, England; 3.Alfred Wegener Inst Polar & Marine Res, Bremerhaven, Germany; 4.Univ Bristol, Sch Earth Sci, Bristol, Avon, England |
推荐引用方式 GB/T 7714 | Smith, Emma C.,Baird, Alan F.,Kendall, J. Michael,et al. Ice fabric in an Antarctic ice stream interpreted from seismic anisotropy[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(8). |
APA | Smith, Emma C..,Baird, Alan F..,Kendall, J. Michael.,Martin, Carlos.,White, Robert S..,...&Smith, Andrew M..(2017).Ice fabric in an Antarctic ice stream interpreted from seismic anisotropy.GEOPHYSICAL RESEARCH LETTERS,44(8). |
MLA | Smith, Emma C.,et al."Ice fabric in an Antarctic ice stream interpreted from seismic anisotropy".GEOPHYSICAL RESEARCH LETTERS 44.8(2017). |
条目包含的文件 | 条目无相关文件。 |
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