Subglacial Access and Fast Ice Research Experiment (SAFIRE): Resolving the Basal Control on Ice Flow and Calving in Greenland

冰下通道和快速结冰研究实验（SAFIRE）：解决格陵兰岛冰流和崩解的基础控制问题

• 批准号: NE/K006126/1
• 负责人: Bryn Hubbard
• 金额: $ 43.43万
• 依托单位: Aberystwyth University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FK006126%2F1
• 关键词: Subglacial; Access; Fast; Ice; Research

Marine-terminating outlet glaciers drain 88% of the Greenland Ice Sheet and are responsible for at least half of the ice sheet's net annual mass loss, which at present is around 200 km3/year. Understanding the processes that drive the fast flow of these glaciers is crucial because a growing body of evidence points to a strong, but spatially varied and often complex, response to both oceanographic and atmospheric forcing. While the bed of glaciers elsewhere is known to strongly influence the flow of ice, no observations have ever been made from beneath a marine-terminating glacier in Greenland; a potential and likely cause of significant error in current predictions of sea level rise. This project will correct this paucity of observational constraint by gaining access to the bed of a major marine-terminating outlet glacier (Store Gletscher) in West Greenland, in order to observe and characterise the basal interface. With instruments deployed at the bed and on the glacier's surface and forefield, the project will fully resolve the basal control on ice flow and the glacier's response to iceberg calving, including the effects of meltwater input to the bed. The observational outcome will inform the glacier's sensitivity to atmospheric as well as oceanographic forcing while also enabling numerical ice flow modelling of unprecedented detail and accuracy.

海洋末端的出口冰川排出了格陵兰冰盖的88%，并至少造成了冰盖年净质量损失的一半，目前约为200千米/年。理解驱动这些冰川快速流动的过程至关重要，因为越来越多的证据表明，对海洋和大气强迫的反应很强烈，但在空间上不同，而且往往是复杂的。虽然众所周知，其他地方的冰川床对冰川的流动有很大的影响，但从格陵兰岛海洋冰川的底部从未进行过观测；这可能是目前海平面上升预测出现重大错误的潜在原因。该项目将通过进入格陵兰岛西部一个主要的海洋终点出口冰川(Store Gletscher)的河床来纠正这种观测限制的匮乏，以便观察和描述基本界面。随着仪器部署在冰床和冰川表面以及FOREFIELD，该项目将完全解决对冰流的基本控制和冰川对冰山崩解的反应，包括融水输入到冰床的影响。观测结果将告知冰川对大气和海洋强迫的敏感性，同时也使冰流数值模拟能够获得前所未有的细节和准确性。

项目成果

Subglacial water pressure records from a fast-flowing outlet glacier in Greenland

格陵兰岛快速流动的出口冰川的冰下水压记录

• DOI: 10.5194/egusphere-egu2020-7271
• 发表时间: 2020
• 作者: Doyle S

Water flow through sediments and at the ice-sediment interface beneath Sermeq Kujalleq (Store Glacier), Greenland

水流穿过沉积物以及格陵兰岛 Sermeq Kujalleq（斯托冰川）下方的冰-沉积物界面

• DOI: 10.31223/x56w54
• 发表时间: 2022
• 作者: Doyle S

Physical Conditions of Fast Glacier Flow: 1. Measurements From Boreholes Drilled to the Bed of Store Glacier, West Greenland

• DOI: 10.1002/2017jf004529
• 发表时间: 2018-02-01
• 期刊: JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
• 影响因子: 3.9
• 作者: Doyle, S. H.;Hubbard, B.;Hubbard, A.
• 通讯作者: Hubbard, A.

Persistent flow acceleration within the interior of the Greenland ice sheet

• DOI: 10.1002/2013gl058933
• 发表时间: 2014-02-16
• 期刊: GEOPHYSICAL RESEARCH LETTERS
• 影响因子: 5.2
• 作者: Doyle, Samuel H.;Hubbard, Alun;Hubbard, Bryn
• 通讯作者: Hubbard, Bryn

Detecting anisotropy using Distributed Acoustic Sensing and fibre-optic seismology in a fast-flowing glacier in Greenland

使用分布式声学传感和光纤地震学检测格陵兰岛快速流动的冰川中的各向异性

• DOI: 10.5194/egusphere-egu2020-7709
• 发表时间: 2020
• 作者: Booth A