| DOI: | 10.1002/2014GL062715
|
| 论文题名: | Dynamic jamming of iceberg-choked fjords |
| 作者: | Peters I.R.; Amundson J.M.; Cassotto R.; Fahnestock M.; Darnell K.N.; Truffer M.; Zhang W.W.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-8947
|
| EISSN: | 1944-8678
|
| 出版年: | 2015
|
| 卷: | 42, 期:4 | | 起始页码: | 1122
|
| 结束页码: | 1129
|
| 语种: | 英语
|
| 英文关键词: | calving
; glaciers
; icebergs
; jamming
|
| Scopus关键词: | Glaciers
; Jamming
; Kinetic energy
; Kinetics
; Sea ice
; Calving
; Icebergs
; Jammed state
; Motion of individual
; Orders of magnitude
; Rapid motions
; Slow relaxations
; Stress transmission
; Ice
; compaction
; fjord
; ice breakup
; ice movement
; iceberg
; kinetic energy
; melange
; radar
; videography
; Arctic
; Greenland
; Jakobshavn Isbrae
|
| 英文摘要: | We investigate the dynamics of ice mélange by analyzing rapid motion recorded by a time-lapse camera and terrestrial radar during several calving events that occurred at Jakobshavn Isbræ, Greenland. During calving events (1) the kinetic energy of the ice mélange is 2 orders of magnitude smaller than the total energy released during the events, (2) a jamming front propagates through the ice mélange at a rate that is an order of magnitude faster than the motion of individual icebergs, (3) the ice mélange undergoes initial compaction followed by slow relaxation and extension, and (4) motion of the ice mélange gradually decays before coming to an abrupt halt. These observations indicate that the ice mélange experiences widespread jamming during calving events and is always close to being in a jammed state during periods of terminus quiescence. We therefore suspect that local jamming influences longer timescale ice mélange dynamics and stress transmission. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924867205&doi=10.1002%2f2014GL062715&partnerID=40&md5=c1ec08d0c76d3dc1a9ab8e417e2082d7
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8563
|
| Appears in Collections: | 科学计划与规划
气候变化与战略
|
|
There are no files associated with this item.
|
|
作者单位: | James Franck Institute, Department of Physics, University of Chicago, Chicago, IL, United States
|
| Recommended Citation: | |
Peters I.R.,Amundson J.M.,Cassotto R.,et al. Dynamic jamming of iceberg-choked fjords[J]. Geophysical Research Letters,2015-01-01,42(4).
|
|
|