| DOI: | 10.5194/tc-9-1169-2015
|
| Scopus记录号: | 2-s2.0-84930947880
|
| 论文题名: | Evolution of ice-shelf channels in Antarctic ice shelves |
| 作者: | Drews R
|
| 刊名: | Cryosphere
|
| ISSN: | 19940416
|
| 出版年: | 2015
|
| 卷: | 9, 期:3 | | 起始页码: | 1169
|
| 结束页码: | 1181
|
| 语种: | 英语
|
| 英文关键词: | basal melting
; channel morphology
; data set
; flow field
; ice shelf
; ice thickness
; ice-ocean interaction
; numerical model
; radar
; velocity
; Antarctica
; East Antarctica
; Roi Baudouin Ice Shelf
|
| 英文摘要: | Ice shelves buttress the continental ice flux and mediate ice-ocean interactions. They are often traversed by channels in which basal melting is enhanced, impacting ice-shelf stability. Here, channel evolution is investigated using a transient, three-dimensional full Stokes model and geophysical data collected on the Roi Baudouin Ice Shelf (RBIS), Antarctica. The modeling confirms basal melting as a feasible mechanism for channel creation, although channels may also advect without melting for many tens of kilometers. Channels can be out of hydrostatic equilibrium depending on their width and the upstream melt history. Inverting surface elevation for ice thickness using hydrostatic equilibrium in those areas is erroneous, and corresponding observational evidence is presented at RBIS by comparing the hydrostatically inverted ice thickness with radar measurements. The model shows that channelized melting imprints the flow field characteristically, which can result in enhanced horizontal shearing across channels. This is exemplified for a channel at RBIS using observed surface velocities and opens up the possibility to classify channelized melting from space, an important step towards incorporating these effects in ice-ocean models. © Author(s) 2015. CC Attribution 3.0 License. |
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/75289
|
| Appears in Collections: | 影响、适应和脆弱性
气候变化与战略
|
|
There are no files associated with this item.
|
|
作者单位: | Laboratoire de Glaciologie, Université Libre de Bruxelles, Brussels, Belgium
|
| Recommended Citation: | |
Drews R. Evolution of ice-shelf channels in Antarctic ice shelves[J]. Cryosphere,2015-01-01,9(3)
|
|
|