Subglacial drainage dynamics
冰下排水动力学
基本信息
- 批准号:361960-2013
- 负责人:
- 金额:$ 1.27万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Northern Research Supplement
- 财政年份:2017
- 资助国家:加拿大
- 起止时间:2017-01-01 至 2018-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Glaciers and ice sheets hold the key to future sea level rise. Glaciers also play a crucial role regionally, particularly in the Canadian north, as they reshape the landscape and affect the availability of water resources through storing and diverting water. Ice flow is a key part in the behaviour of glaciers: faster flow tends to lead to thinner and smaller glaciers. Yet controls on some of the most dramatic examples of fast glacier flow, glacier surges, are poorly understood. Glacier surges are rapid advances in a glacier that are caused by an abrupt change in water pressure at its bed. All glaciers, not only those that surge, are affected by pressurized water at their base, as this weakens the ice-bed contact and facilitates fast sliding. The physics that controls the level of pressurization of water at the glacier bed is only incompletely understood. The proposed research will combine a targeted field work program with advanced quantitative geophysics techniques to map and quantify the evolution of the melt water drainage system at the base of a surge-type glacier in the St Elias Mountains, Yukon Territory. We will use these data to develop novel numerical models of subglacial drainage in order to understand the physics behind surges and other fast glacier flow phenomena. Capitalizing on the proximity of the proposed field site to a glacier-dammed lake, we will also conduct a study of the outburst floods produced this lake. Such floods can present major natural hazards in glacierized areas. Flood waters in such floods are routed under the glacier before emerging to potentially destructive effect, and the physics involved are similar to those that drive less disruptive drainage under glaciers. Our research will aim to quantify how floods are triggered and therefore how their occurence and size can ultimately be predicted.
冰川和冰盖是未来海平面上升的关键。冰川还在区域范围内发挥着至关重要的作用,特别是在加拿大北部,因为它们重塑了景观,并通过储存和转移水来影响水资源的可用性。冰流是冰川行为的一个关键部分:更快的流动往往导致更薄和更小的冰川。然而,对一些最引人注目的快速冰川流动的例子,冰川涌动的控制却知之甚少。冰川涌浪是冰川的快速前进,是由河床水压的突然变化引起的。所有的冰川,不仅仅是那些涌动的冰川,都受到底部加压水的影响,因为这削弱了冰床的接触,促进了快速滑动。控制冰川床水加压水平的物理学还不完全清楚。拟议的研究将结合联合收割机有针对性的实地工作计划与先进的定量地球物理学技术,以映射和量化的变化,在圣伊莱亚斯山脉,育空地区地区的浪涌型冰川的基础上的融水排水系统。我们将利用这些数据开发新的冰下排水数值模型,以了解浪涌和其他快速冰川流动现象背后的物理学。利用拟议的现场接近一个冰川堰塞湖,我们还将进行一项研究,该湖产生的突发洪水。这种洪水可能对冰川化地区造成重大的自然危害。这种洪水中的洪水沃茨在出现潜在的破坏性影响之前被引导到冰川下,所涉及的物理学与那些在冰川下驱动破坏性较小的排水的物理学相似。我们的研究将旨在量化洪水是如何引发的,因此如何最终预测其发生和规模。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Schoof, Christian其他文献
How sensitive are mountain glaciers to climate change? Insights from a block model
- DOI:
10.1017/jog.2018.15 - 发表时间:
2018-04-01 - 期刊:
- 影响因子:3.4
- 作者:
Bach, Eviatar;Radic, Valentina;Schoof, Christian - 通讯作者:
Schoof, Christian
Marine ice sheet stability
- DOI:
10.1017/jfm.2012.43 - 发表时间:
2012-05-10 - 期刊:
- 影响因子:3.7
- 作者:
Schoof, Christian - 通讯作者:
Schoof, Christian
Ice sheet grounding line dynamics: Steady states, stability, and hysteresis
- DOI:
10.1029/2006jf000664 - 发表时间:
2007-07-14 - 期刊:
- 影响因子:3.9
- 作者:
Schoof, Christian - 通讯作者:
Schoof, Christian
Boundary layer models for calving marine outlet glaciers
- DOI:
10.5194/tc-11-2283-2017 - 发表时间:
2017-10-05 - 期刊:
- 影响因子:5.2
- 作者:
Schoof, Christian;Davis, Andrew D.;Popa, Tiberiu V. - 通讯作者:
Popa, Tiberiu V.
Marine ice-sheet dynamics. Part 1. The case of rapid sliding
- DOI:
10.1017/s0022112006003570 - 发表时间:
2007-02-25 - 期刊:
- 影响因子:3.7
- 作者:
Schoof, Christian - 通讯作者:
Schoof, Christian
Schoof, Christian的其他文献
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{{ truncateString('Schoof, Christian', 18)}}的其他基金
Hydraulic and mechanical controls on fast glacier flow
对快速冰川流动的液压和机械控制
- 批准号:
RGPIN-2018-04665 - 财政年份:2022
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Individual
Hydraulic and mechanical controls on fast glacier flow
对快速冰川流动的液压和机械控制
- 批准号:
RGPIN-2018-04665 - 财政年份:2021
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Individual
Glacier Lake Outburst Floods, Subglacial drainage, Glacier surges
冰川湖溃决洪水、冰下排水、冰川涌动
- 批准号:
518002-2018 - 财政年份:2021
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Northern Research Supplement
Hydraulic and mechanical controls on fast glacier flow
对快速冰川流动的液压和机械控制
- 批准号:
RGPIN-2018-04665 - 财政年份:2020
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Individual
Glacier Lake Outburst Floods, Subglacial drainage, Glacier surges
冰川湖溃决洪水、冰下排水、冰川涌动
- 批准号:
518002-2018 - 财政年份:2020
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Northern Research Supplement
Hydraulic and mechanical controls on fast glacier flow
对快速冰川流动的液压和机械控制
- 批准号:
RGPIN-2018-04665 - 财政年份:2019
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Individual
Glacier Lake Outburst Floods, Subglacial drainage, Glacier surges
冰川湖溃决洪水、冰下排水、冰川涌动
- 批准号:
518002-2018 - 财政年份:2019
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Northern Research Supplement
Hydraulic and mechanical controls on fast glacier flow
对快速冰川流动的液压和机械控制
- 批准号:
RGPIN-2018-04665 - 财政年份:2018
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Individual
Glacier Lake Outburst Floods, Subglacial drainage, Glacier surges
冰川湖溃决洪水、冰下排水、冰川涌动
- 批准号:
518002-2018 - 财政年份:2018
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Northern Research Supplement
Processes of fast glacier flow
冰川快速流动过程
- 批准号:
357193-2013 - 财政年份:2017
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Individual
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Subglacial drainage dynamics
冰下排水动力学
- 批准号:
361960-2013 - 财政年份:2016
- 资助金额:
$ 1.27万 - 项目类别:
Discovery Grants Program - Northern Research Supplement