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Quantifying the role of marine ice in Larsen C ice shelf dynamics

量化海冰在拉森 C 冰架动力学中的作用

基本信息

批准号：
NE/I016678/1
负责人：
Adrian Luckman
金额：
$ 6.27万
依托单位：
Swansea University
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2011
资助国家：
英国
起止时间：
2011 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FI016678%2F1
关键词：
Quantifying role marine ice Larsen

项目摘要

The Antarctic continent is fringed by ice shelves, the floating extensions of glaciers and ice streams, which provide an important buffer between the ice sheets and the ocean. The collapse of ice shelves has been shown to allow inland ice to accelerate, thus leading to sea level rise. Previous collapses are not completely explained, partly because the structure of ice shelves is only now being understood. In this small project we will focus on an emerging aspect of ice shelf structure which may be fundamental to their stability. Where two ice-shelf-feeding glaciers merge, the ice between them is thin and water can freeze onto the base of this ice to form a band of 'marine ice' which is then entrained with the glacier (or 'meteoric') ice as it flows with the ice shelf towards the open ocean. Marine ice is warmer, softer, and more permeable than meteoric ice and can therefore provide bands of weakness which need to be better understood. We will investigate this aspect of the Larsen C ice shelf on the Antarctic Peninsula using unique ice-penetrating radar data that we have collected over the last two seasons, remote sensing techniques that we have been developing for many years, and specific expertise in ice shelf modelling. Within the eight months of the project we will be able to test the importance of marine ice bands in the stability of Antarctic ice shelves where they form.

南极大陆的边缘是冰架，冰川和冰流的漂浮延伸，在冰盖和海洋之间提供了重要的缓冲。冰架的崩溃已被证明允许内陆冰加速，从而导致海平面上升。之前的崩塌并没有得到完全解释，部分原因是冰架的结构现在才被了解。在这个小项目中，我们将重点关注冰架结构的一个新兴方面，这可能是其稳定性的基础。在两个冰架喂养冰川合并的地方，它们之间的冰很薄，水可以冻结在冰的底部，形成一个“海洋冰”带，然后随着冰架流向开阔的海洋，冰川（或“流星”）冰被夹带。海冰比流冰更温暖，更柔软，更易渗透，因此可以提供需要更好理解的薄弱地带。我们将调查这方面的拉森C冰架在南极半岛使用独特的冰穿透雷达数据，我们已经收集了在过去的两个赛季，遥感技术，我们已经开发了多年，在冰架建模的具体专业知识。在该项目的八个月内，我们将能够测试海洋冰带在南极冰架稳定性方面的重要性。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Flow regime of the Joerg Peninsula suture zone, Larsen C Ice Shelf: The role of marine ice

约尔格半岛缝合带、拉森 C 冰架的流态：海冰的作用

DOI：
发表时间：
2012
期刊：
EGU General Assembly 2012
影响因子：
0
作者：
Daniela Jansen
通讯作者：
Daniela Jansen

Basal crevasses in Larsen C Ice Shelf and implications for their global abundance

DOI：
10.5194/tc-6-113-2012
发表时间：
2012-01-01
期刊：
CRYOSPHERE
影响因子：
5.2
作者：
Luckman, A.;Jansen, D.;Benn, D. I.
通讯作者：
Benn, D. I.

Marine ice regulates the future stability of a large Antarctic ice shelf.

DOI：
10.1038/ncomms4707
发表时间：
2014-04-22
期刊：
NATURE COMMUNICATIONS
影响因子：
16.6
作者：
Kulessa, Bernd;Jansen, Daniela;Luckman, Adrian J.;King, Edward C.;Sammonds, Peter R.
通讯作者：
Sammonds, Peter R.

Marine ice formation in a suture zone on the Larsen C Ice Shelf and its influence on ice shelf dynamics