| DOI: | 10.1002/2015GL067247
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| 论文题名: | On the role of buoyant flexure in glacier calving |
| 作者: | Wagner T.J.W.; James T.D.; Murray T.; Vella D.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9482
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| EISSN: | 1944-9213
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| 出版年: | 2016
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| 卷: | 43, 期:1 | | 起始页码: | 232
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| 结束页码: | 240
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| 语种: | 英语
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| 英文关键词: | elastic beam theory
; floating ice shelves/glacier tongues
; glacier calving
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| Scopus关键词: | Buoyancy
; Hydraulics
; Ice
; Additional buoyancy
; Elastic beam
; Floating ice
; Grounding line
; Horizontal pressure
; Hydrostatic forces
; In-plane stress
; Material conditions
; Climate models
; buoyancy
; cryosphere
; deformation mechanism
; elasticity
; flexure
; floating ice
; grounding line
; hydrostatics
; ice breakup
; ice shelf
; ice-ocean interaction
; numerical model
; torque
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| 英文摘要: | Interactions between glaciers and the ocean are key for understanding the dynamics of the cryosphere in the climate system. Here we investigate the role of hydrostatic forces in glacier calving. We develop a mathematical model to account for the elastic deformation of glaciers in response to three effects: (i) marine and lake-terminating glaciers tend to enter water with a nonzero slope, resulting in upward flexure around the grounding line; (ii) horizontal pressure imbalances at the terminus are known to cause hydrostatic in-plane stresses and downward acting torque; (iii) submerged ice protrusions at the glacier front may induce additional buoyancy forces that can cause calving. Our model provides theoretical estimates of the importance of each effect and suggests geometric and material conditions under which a given glacier will calve from hydrostatic flexure. We find good agreement with observations. This work sheds light on the intricate processes involved in glacier calving and can be hoped to improve our ability to model and predict future changes in the ice-climate system. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957727688&doi=10.1002%2f2015GL067247&partnerID=40&md5=eefb51bd93784fcf179b65860a501656
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/10445
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Scripps Institution of Oceanography, University of California San Diego, San Diego, CA, United States
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| Recommended Citation: | |
Wagner T.J.W.,James T.D.,Murray T.,et al. On the role of buoyant flexure in glacier calving[J]. Geophysical Research Letters,2016-01-01,43(1).
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