Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41467-017-00513-8 |
Direct measurements of ice-shelf flexure caused by surface meltwater ponding and drainage | |
Banwell, Alison F.1,2; Willis, Ian C.1,2; Macdonald, Grant J.3; Goodsell, Becky3; MacAyeal, Douglas R.3 | |
2019-02-13 | |
发表期刊 | NATURE COMMUNICATIONS
![]() |
ISSN | 2041-1723 |
出版年 | 2019 |
卷号 | 10 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA |
英文摘要 | Global sea-level rise is caused, in part, by more rapid ice discharge from Antarctica, following the removal of the restraining forces of floating ice-shelves after their break-up. A trigger of ice-shelf break-up is thought to be stress variations associated with surface meltwater ponding and drainage, causing flexure and fracture. But until now, there have been no direct measurements of these processes. Here, we present field data from the McMurdo Ice Shelf, Antarctica, showing that the filling, to similar to 2 m depth, and subsequent draining, by overflow and channel incision, of four surface lakes causes pronounced and immediate ice-shelf flexure over multiple-week timescales. The magnitude of the vertical ice-shelf deflection reaches maxima of similar to 1 m at the lake centres, declining to zero at distances of <500 m. Our results should be used to guide development of continent-wide ice-sheet models, which currently do not simulate ice-shelf break-up due to meltwater loading and unloading. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000458567500010 |
WOS关键词 | SUPRAGLACIAL LAKE ; SEASONAL EVOLUTION ; GREENLAND ; SHEET ; FRACTURE ; COLLAPSE ; DRIVEN ; ANTARCTICA ; GLACIER ; RETREAT |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/203445 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Cambridge, Scott Polar Res Inst, Cambridge CB2 1ER, England; 2.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 3.Univ Chicago, Dept Geophys Sci, 5734 S Ellis Ave, Chicago, IL 60637 USA |
推荐引用方式 GB/T 7714 | Banwell, Alison F.,Willis, Ian C.,Macdonald, Grant J.,et al. Direct measurements of ice-shelf flexure caused by surface meltwater ponding and drainage[J]. NATURE COMMUNICATIONS,2019,10. |
APA | Banwell, Alison F.,Willis, Ian C.,Macdonald, Grant J.,Goodsell, Becky,&MacAyeal, Douglas R..(2019).Direct measurements of ice-shelf flexure caused by surface meltwater ponding and drainage.NATURE COMMUNICATIONS,10. |
MLA | Banwell, Alison F.,et al."Direct measurements of ice-shelf flexure caused by surface meltwater ponding and drainage".NATURE COMMUNICATIONS 10(2019). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论