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| DOI | 10.1126/science.aaz1183 |
| A slip law for glaciers on deformable beds | |
| Zoet L.K.; Iverson N.R. | |
| 发表日期 | 2020 |
| ISSN | 0036-8075 |
| 卷号 | 368期号:6486 |
| 英文摘要 | Slip of marine-terminating ice streams over beds of deformable till is responsible for most of the contribution of the West Antarctic Ice Sheet to sea level rise. Flow models of the ice sheet and till-bedded glaciers elsewhere require a law that relates slip resistance, slip velocity, and water pressure at the bed. We present results of experiments in which pressurized ice at its melting temperature is slid over a water-saturated till bed. Steady-state slip resistance increases with slip velocity owing to sliding of ice across the bed, but above a threshold velocity, till shears at its rate-independent Coulomb strength. These results motivate a generalized slip law for glacier-flow models that combines processes of hard-bedded sliding and bed deformation. © 2020 American Association for the Advancement of Science. All rights reserved. |
| 关键词 | icewaterCoulomb criterionflow modelingglacier flowice sheetsea level changeslidingthresholdArticlecontrolled studyflow rateglacierglacier slipice sheetmelting temperaturepressurepriority journalsteady statestrengthwater flowwater pressureAntarctic Ice SheetAntarcticaWest Antarctic Ice SheetWest Antarctica |
| 语种 | 英语 |
| 来源机构 | Science |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/133588 |
| 推荐引用方式 GB/T 7714 | Zoet L.K.,Iverson N.R.. A slip law for glaciers on deformable beds[J]. Science,2020,368(6486). |
| APA | Zoet L.K.,&Iverson N.R..(2020).A slip law for glaciers on deformable beds.,368(6486). |
| MLA | Zoet L.K.,et al."A slip law for glaciers on deformable beds".368.6486(2020). |
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