| DOI: | 10.1002/2014GL060618
|
| 论文题名: | Basal terraces on melting ice shelves |
| 作者: | Dutrieux P.; Stewart C.; Jenkins A.; Nicholls K.W.; Corr H.F.J.; Rignot E.; Steffen K.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-9889
|
| EISSN: | 1944-9620
|
| 出版年: | 2014
|
| 卷: | 41, 期:15 | | 起始页码: | 5506
|
| 结束页码: | 5513
|
| 语种: | 英语
|
| 英文关键词: | cryosphere
; ice
; ice shelf-ocean interactions
; ocean
|
| Scopus关键词: | Melting
; Oceanography
; Boundary layers
; Cryosphere
; Current models
; Flat terraces
; Inclined walls
; Melting ice
; ocean
; Pine island glaciers
; West antarctica
; Ice shelves
; Ocean boundaries
; Ocean water
; Ice
; boundary layer
; ice flow
; ice shelf
; melting
; terrace
; Antarctica
; Pine Island Glacier
; West Antarctica
; West Antarctica
|
| 英文摘要: | Ocean waters melt the margins of Antarctic and Greenland glaciers, and individual glaciers' responses and the integrity of their ice shelves are expected to depend on the spatial distribution of melt. The bases of the ice shelves associated with Pine Island Glacier (West Antarctica) and Petermann Glacier (Greenland) have similar geometries, including kilometer-wide, hundreds-of-meter high channels oriented along and across the direction of ice flow. The channels are enhanced by, and constrain, oceanic melt. New meter-scale observations of basal topography reveal peculiar glaciated landscapes. Channel flanks are not smooth, but are instead stepped, with hundreds-of-meters-wide flat terraces separated by 5-50m high walls. Melting is shown to be modulated by the geometry: constant across each terrace, changing from one terrace to the next, and greatly enhanced on the ∼45° inclined walls. Melting is therefore fundamentally heterogeneous and likely associated with stratification in the ice-ocean boundary layer, challenging current models of ice shelf-ocean interactions. Key Points Basal topography of melting ice shelves is complex Basal terraces appear ubiquitous under melting ice shelves Melting concentrates on walls between terraces © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905289632&doi=10.1002%2f2014GL060618&partnerID=40&md5=0a223a55e552ed49ed73702fd5aa5f9a
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7153
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | British Antarctic Survey, NERC, Cambridge, United Kingdom
|
| Recommended Citation: | |
Dutrieux P.,Stewart C.,Jenkins A.,et al. Basal terraces on melting ice shelves[J]. Geophysical Research Letters,2014-01-01,41(15).
|
|
|