Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL071560 |
Bounds on the calving cliff height of marine terminating glaciers | |
Ma, Yue1; Tripathy, Cory S.2; Bassis, Jeremy N.3 | |
2017-02-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Increased calving and rapid retreat of glaciers can contribute significantly to sea level rise, but the processes controlling glacier retreat remain poorly understood. We seek to improve our understanding of calving by investigating the stress field controlling tensile and shear failure using a 2-D full-Stokes finite element model. Using idealized rectangular geometries, we find that when rapidly sliding glaciers thin to near buoyancy, full thickness tensile failure occurs, similar to observations motivating height-above-buoyancy calving laws. In contrast, when glaciers are frozen to their beds, basal crevasse penetration is suppressed and calving is minimal. We also find that shear stresses are largest when glaciers are thickest. Together, the tensile and shear failure criteria map out a stable envelope in an ice-thickness-water-depth diagram. The upper and lower bounds on cliff height can be incorporated into numerical ice sheet models as boundary conditions, thus bracketing the magnitude of calving rates in marine-terminating glaciers. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396115000022 |
WOS关键词 | FRACTURE-MECHANICS ; ICE ; STABILITY ; CREVASSES ; DAMAGE ; WATER ; RATES ; MELT ; LAW |
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/25810 |
专题 | 气候变化 |
作者单位 | 1.Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA; 2.Univ Michigan, Earth & Environm Sci, Ann Arbor, MI 48109 USA; 3.Univ Michigan, Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 | Ma, Yue,Tripathy, Cory S.,Bassis, Jeremy N.. Bounds on the calving cliff height of marine terminating glaciers[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(3). |
APA | Ma, Yue,Tripathy, Cory S.,&Bassis, Jeremy N..(2017).Bounds on the calving cliff height of marine terminating glaciers.GEOPHYSICAL RESEARCH LETTERS,44(3). |
MLA | Ma, Yue,et al."Bounds on the calving cliff height of marine terminating glaciers".GEOPHYSICAL RESEARCH LETTERS 44.3(2017). |
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