| DOI: | 10.1002/2014GL060832
|
| 论文题名: | The "footloose" mechanism: Iceberg decay from hydrostatic stresses |
| 作者: | Wagner T.J.W.; Wadhams P.; Bates R.; Elosegui P.; Stern A.; Vella D.; Abrahamsen E.P.; Crawford A.; Nicholls K.W.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-9885
|
| EISSN: | 1944-9616
|
| 出版年: | 2014
|
| 卷: | 41, 期:15 | | 起始页码: | 5522
|
| 结束页码: | 5529
|
| 语种: | 英语
|
| 英文关键词: | iceberg beam theory
; iceberg breakup observations
; iceberg modeling
|
| Scopus关键词: | Hydraulics
; Mathematical models
; Analytic expressions
; Analytical expressions
; Beam theories
; Field experiment
; Hydrostatic stress
; iceberg breakup observations
; Iceberg models
; Surface profiles
; Critical length
; East Canada
; Induced decay
; Induced stress
; Sea ice
; hydrostatics
; ice breakup
; iceberg
; overburden
; shoreline
; Arctic Ocean
; Baffin Bay [Arctic Ocean]
; Canada
|
| 英文摘要: | We study a mechanism of iceberg breakup that may act together with the recognized melt and wave-induced decay processes. Our proposal is based on observations from a recent field experiment on a large ice island in Baffin Bay, East Canada. We observed that successive collapses of the overburden from above an unsupported wavecut at the iceberg waterline created a submerged foot fringing the berg. The buoyancy stresses induced by such a foot may be sufficient to cause moderate-sized bergs to break off from the main berg. A mathematical model is developed to test the feasibility of this mechanism. The results suggest that once the foot reaches a critical length, the induced stresses are sufficient to cause calving. The theoretically predicted maximum stable foot length compares well to the data collected in situ. Further, the model provides analytical expressions for the previously observed "rampart-moat" iceberg surface profiles. Key Points Observational iceberg data from 2012 Baffin Bay field experiment Mathematical model of iceberg decay due to hydrostatic stresses Analytic expressions for iceberg profiles and breakup conditions developed © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905327992&doi=10.1002%2f2014GL060832&partnerID=40&md5=5dfa216977259d9fd269c11a97e09e56
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7149
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | Scripps Institution of Oceanography, University of California, San Diego, CA, United States
|
| Recommended Citation: | |
Wagner T.J.W.,Wadhams P.,Bates R.,et al. The "footloose" mechanism: Iceberg decay from hydrostatic stresses[J]. Geophysical Research Letters,2014-01-01,41(15).
|
|
|