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DOI | 10.1029/2018GL078069 |
Describing Snow Instability by Failure Initiation, Crack Propagation, and Slab Tensile Support | |
Reuter, B.1,2; Schweizer, J.1 | |
2018-07-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:14页码:7019-7027 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; USA |
英文摘要 | Snow instability is a generic term describing the propensity of a snow slope to avalanche. In need of a concise mechanics-based concept we suggest a framework based on failure initiation, crack propagation, and slab tensile support. Following these three steps we modeled three metrics from mechanical data, which we derived from snow micropenetrometer signals. Verifying the metrics with field measurements confirmed that slab thickness and weak layer strength typically influence failure initiation, elastic modulus and weak layer fracture energy largely control crack propagation, and slab thickness and tensile strength provide the required tensile support. For all three metrics, considering slab layering was essential. Validation with signs of instability showed that the most accurate model includes all three steps - suggesting that snow instability can be described by failure initiation, crack propagation, and slab tensile support. Further validation is needed to assess the framework's potential for operational use. |
英文关键词 | snowpack stability snow mechanics avalanche release finite elements ROC curve |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442582100030 |
WOS关键词 | NUMERICAL-MODEL ; STABILITY ; LAYERS ; AVALANCHES ; FORECASTS ; PATTERNS ; FRACTURE ; COVER ; TESTS ; SCALE |
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/29092 |
专题 | 气候变化 |
作者单位 | 1.WSL Inst Snow & Avalanche Res SLF, Davos, Switzerland; 2.Montana State Univ, Dept Civil Engn, Bozeman, MT 59717 USA |
推荐引用方式 GB/T 7714 | Reuter, B.,Schweizer, J.. Describing Snow Instability by Failure Initiation, Crack Propagation, and Slab Tensile Support[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(14):7019-7027. |
APA | Reuter, B.,&Schweizer, J..(2018).Describing Snow Instability by Failure Initiation, Crack Propagation, and Slab Tensile Support.GEOPHYSICAL RESEARCH LETTERS,45(14),7019-7027. |
MLA | Reuter, B.,et al."Describing Snow Instability by Failure Initiation, Crack Propagation, and Slab Tensile Support".GEOPHYSICAL RESEARCH LETTERS 45.14(2018):7019-7027. |
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