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DOI | 10.1002/2016GL071919 |
Experimental observation of the onset of fracture percolation in columnar ice | |
Renshaw, Carl E.1,2; Schulson, Erland M.2; Sigward, Stephen J. G.2 | |
2017-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | While the contribution of brine channels to the critical behavior of sea ice permeability is well known, fractures can also contribute to the critical behavior of ice permeability. Above a critical fracture density, cracks link together to create a continuous pathway for flow. To isolate the contribution of fractures to percolation through ice, we present novel experiments to quantify the critical strain required for the onset of fracture percolation in freshwater columnar-grained ice. We monitored the percolation of the ice as it was compressed uniaxially across the columns at -10 degrees C to axial strains of 0.5-2% at a strain rate of 10(-5) s(-1), i.e., 1 order of magnitude below the ductile-to-brittle transition. We observed that the threshold for along-column permeability corresponds with peak strength. Lateral connectivity develops over limited distances postpeak strength near the onset of near-steady state flow and is facilitated by the breakage of the columns. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396411100021 |
WOS关键词 | BRITTLE COMPRESSIVE FAILURE ; SEA-ICE ; HYDRAULIC-PROPERTIES ; LENGTH DISTRIBUTION ; ARCTIC-OCEAN ; NETWORKS ; CONNECTIVITY ; ROCK ; DISTRIBUTIONS ; TRANSITION |
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/27899 |
专题 | 气候变化 |
作者单位 | 1.Dartmouth Coll, Dept Earth Sci, Hanover, NH 03755 USA; 2.Dartmouth Coll, Thayer Sch Engn, Hanover, NH 03755 USA |
推荐引用方式 GB/T 7714 | Renshaw, Carl E.,Schulson, Erland M.,Sigward, Stephen J. G.. Experimental observation of the onset of fracture percolation in columnar ice[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(4). |
APA | Renshaw, Carl E.,Schulson, Erland M.,&Sigward, Stephen J. G..(2017).Experimental observation of the onset of fracture percolation in columnar ice.GEOPHYSICAL RESEARCH LETTERS,44(4). |
MLA | Renshaw, Carl E.,et al."Experimental observation of the onset of fracture percolation in columnar ice".GEOPHYSICAL RESEARCH LETTERS 44.4(2017). |
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