Basal Conditions on Rutford Ice Stream: Bed Access, Monitoring and Ice Sheet History
拉特福德冰流的基础条件:冰床通道、监测和冰盖历史
基本信息
- 批准号:NE/G014159/1
- 负责人:
- 金额:$ 251.86万
- 依托单位:
- 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:
- 关键词:
项目摘要
The Antarctic and Greenland ice sheets play a major role in controlling Earth's sea level and climate, but our understanding of their history and motion is poor. At the moment, the biggest uncertainty in our ability to predict future sea level comes from these ice sheets. This is particularly important because sea level rise from ice sheets is increasing faster than expected, and because ice sheets have the potential to trigger irreversible sea level rise that would continue for many centuries. Reducing this uncertainty is currently one of the biggest challenges in glaciology. Our project aims to improve our understanding of two aspects of this uncertainty: first, the past behaviour of the West Antarctic Ice Sheet (WAIS), and second, the flow of the fast ice streams that drain it. By choosing the right location, we can address both these aims within one project. Rutford Ice Stream is one of the large, fast-flowing glaciers that drain WAIS and deliver the ice to the ocean. It has the advantage that a large amount of data have already been collected there from surface fieldwork, from aircraft, and from satellites. The next step is to access the ice stream bed directly, and the existing data mean we can identify the optimum locations for this. Using a hot-water drill we will make holes to the bed of the ice stream, through ice more than 2 km thick. Once the drill reaches the bed we will collect samples of sediment from beneath the ice. We will also collect sections of ice core from the ice column. Strings of instruments will be lowered down the holes to measure the pressure in the water system beneath the ice, the temperature profile in the ice and the way the ice deforms as it flows downstream. We will also insert probes into the bed that will measure how fast the ice is sliding, as well as the strength of the sediment in the bed itself. Borehole video cameras will record the nature of the ice, bed and water system, including how much sediment is frozen into the bottom of the ice. On the ice stream surface we will carry out a number of geophysical experiments designed to study the flow of the ice and to map the topography and the variations in basal water and sediment in the area around the drill holes. This will help us to interpret the measurements made in the drill holes. GPS receivers will track the motion of the ice surface; seismic surveys will map the softer and harder areas of bed sediment; radar surveys will show where water beneath the glacier is concentrated or distributed; and a seismometer array will detect the noise bursts emitted as the ice stream grinds over its bed. Project results will be analysed at the British Antarctic Survey, Swansea University and NERC-GEF. Other project partners at NASA-JPL, University College London and the University of Bristol will also contribute. When completed, the project will give information on: - An age for the most recent collapse of the ice sheet in this region - The water system beneath the ice - The thermal regime of the ice and bed - The partition of ice motion between the three different flow mechanisms - sliding, ice deformation and bed deformation The timing of the last ice sheet collapse will be extremely valuable because no other information yet exists in this region. It will help us to understand the way the ice sheet has changed as climate has warmed and cooled in the past. Our other results - characterising ice stream dynamics and how ice, water and the sedimentary bed interact - will help us understand the processes by which ice streams move, and how we should include these processes into models. The results will help to clarify previous work from ice streams elsewhere in Antarctica, which in some cases have been contradictory or inconclusive. Overall, these results will be big steps forward in our ability to understand the way ice sheets behaved in the past, what controls them today, and how they might evolve in the future.
南极和格陵兰冰盖在控制地球海平面和气候方面发挥着重要作用,但我们对它们的历史和运动的了解却很少。目前,我们预测未来海平面的能力的最大不确定性来自这些冰盖。这一点特别重要,因为冰盖导致的海平面上升速度比预期的要快,而且冰盖有可能引发不可逆转的海平面上升,这种上升将持续许多世纪。减少这种不确定性是目前冰川学面临的最大挑战之一。我们的项目旨在提高我们对这种不确定性的两个方面的理解:第一,西南极冰盖(WAIS)的过去行为,第二,快速冰流的流动。通过选择正确的位置,我们可以在一个项目中解决这两个目标。拉特福德冰流(Rutford Ice Stream)是一条大型、快速流动的冰川,它将WAIS排出并将冰输送到海洋中。它的优点是已经从地面实地调查、飞机和卫星收集了大量数据。下一步是直接进入冰河床,现有的数据意味着我们可以确定最佳位置。我们将用热水钻在冰流的河床上打洞,穿过2公里厚的冰。一旦钻头到达海床,我们将从冰下收集沉积物样本。我们还将从冰柱中收集冰芯切片。成串的仪器将下降到洞里,以测量冰下水系的压力、冰中的温度分布以及冰在向下游流动时变形的方式。我们还将在冰床中插入探针,以测量冰的滑动速度,以及冰床中沉积物的强度。钻孔摄像机将记录冰的性质,床和水系统,包括有多少沉积物冻结到冰的底部。在冰流表面,我们将进行若干地球物理实验,以研究冰的流动情况,并绘制钻孔周围地区的地形和基底水和沉积物的变化。这将有助于我们解释钻孔中的测量结果。全球定位系统接收器将跟踪冰表面的运动;地震勘测将绘制河床沉积物的软质和硬质区域;雷达勘测将显示冰川下的水集中或分布的位置;地震仪阵列将探测冰流在河床上研磨时发出的噪音。项目结果将在英国南极调查局、斯旺西大学和全球环境基金国家环境资源中心进行分析。NASA喷气推进实验室、伦敦大学学院和布里斯托大学的其他项目合作伙伴也将作出贡献。项目完成后,将提供以下信息:- 该地区冰盖最近崩塌的年龄-冰下的水系-冰和床的热状态-冰运动在三种不同流动机制之间的划分-滑动,冰的变形和河床的变形最后一次冰盖崩塌的时间将是非常有价值的,因为在这个地区还没有其他的信息。它将帮助我们了解过去随着气候变暖和变冷,冰盖发生变化的方式。我们的其他结果-描述冰流动力学以及冰,水和沉积床如何相互作用-将帮助我们了解冰流移动的过程,以及我们应该如何将这些过程纳入模型。这些结果将有助于澄清以前在南极洲其他地方的冰流研究,这些研究在某些情况下是矛盾的或不确定的。总的来说,这些结果将是我们理解过去冰盖行为方式的能力向前迈出的一大步,今天是什么控制着它们,以及它们在未来可能如何演变。
项目成果
期刊论文数量(9)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Distributed Acoustic Sensing in Antarctica: What we can learn for studying microseismicity elsewhere
南极洲的分布式声学传感:我们可以从其他地方研究微震活动中学到什么
- DOI:10.3997/2214-4609.202131037
- 发表时间:2021
- 期刊:
- 影响因子:0
- 作者:Hudson T
- 通讯作者:Hudson T
Radon transform-based detection of microseismicity on DAS networks: A case study from Antarctica
基于氡变换的 DAS 网络微震活动检测:南极洲的案例研究
- DOI:10.3997/2214-4609.202131039
- 发表时间:2021
- 期刊:
- 影响因子:0
- 作者:Butcher A
- 通讯作者:Butcher A
Downhole distributed acoustic seismic profiling at Skytrain Ice Rise, West Antarctica
西南极洲 Skytrain Ice Rise 的井下分布式声学地震剖面
- DOI:10.5194/tc-2021-1
- 发表时间:2021
- 期刊:
- 影响因子:0
- 作者:Brisbourne A
- 通讯作者:Brisbourne A
Array processing in cryoseismology
冷冻学中的阵列处理
- DOI:10.5194/egusphere-2023-657
- 发表时间:2023
- 期刊:
- 影响因子:0
- 作者:Hudson T
- 通讯作者:Hudson T
Array processing in cryoseismology: a comparison to network-based approaches at an Antarctic ice stream
冷冻地震学中的阵列处理:与南极冰流中基于网络的方法的比较
- DOI:10.5194/tc-17-4979-2023
- 发表时间:2023
- 期刊:
- 影响因子:0
- 作者:Hudson T
- 通讯作者:Hudson T
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Andrew Smith其他文献
Congo red staining in digital pathology: the "SPADA" pipeline.
数字病理学中的刚果红染色:“SPADA”管道。
- DOI:
10.1016/j.labinv.2023.100243 - 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
G. Cazzaniga;M. Bolognesi;Matteo Davide Stefania;Francesco Mascadri;A. Eccher;F. Alberici;Federica Mescia;Andrew Smith;F. Fraggetta;Mattia Rossi;G. Gambaro;F. Pagni;V. L’Imperio - 通讯作者:
V. L’Imperio
Pyroelectrics on purpose: A perspective on generation vs harvesting
有意的热释电:发电与收集的视角
- DOI:
- 发表时间:
2022 - 期刊:
- 影响因子:4
- 作者:
B. Hanrahan;Andrew Smith;B. Bhatia - 通讯作者:
B. Bhatia
A Real-Time Algorithm for Accurate Collision Detection for Deformable Polyhedral Objects
可变形多面体物体精确碰撞检测的实时算法
- DOI:
10.1162/105474698565514 - 发表时间:
1998 - 期刊:
- 影响因子:0
- 作者:
Y. Kitamura;Andrew Smith;H. Takemura;F. Kishino - 通讯作者:
F. Kishino
Destination London: The Expansion of the Visitor Economy
伦敦目的地:游客经济的扩张
- DOI:
- 发表时间:
2019 - 期刊:
- 影响因子:0
- 作者:
Andrew Smith;A. Graham - 通讯作者:
A. Graham
A Symptom-Triggered Benzodiazepine Protocol Utilizing SAS and CIWA-Ar Scoring for the Treatment of Alcohol Withdrawal Syndrome in the Critically Ill
利用 SAS 和 CIWA-Ar 评分的症状触发苯二氮卓方案治疗重症患者的酒精戒断综合征
- DOI:
- 发表时间:
2017 - 期刊:
- 影响因子:0
- 作者:
Soumitra Sen;Phil Grgurich;A. Tulolo;Andrew Smith;Y. Lei;A. Gray;J. Dargin - 通讯作者:
J. Dargin
Andrew Smith的其他文献
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{{ truncateString('Andrew Smith', 18)}}的其他基金
Establishing a new palaeothermometer from the speleothem archive of phosphate-oxygen isotopes
利用磷酸氧同位素洞穴档案建立新的古温度计
- 批准号:
NE/X011968/1 - 财政年份:2023
- 资助金额:
$ 251.86万 - 项目类别:
Research Grant
Next Generation, Physics-Inspired AI for Space Weather Forecasting
用于空间天气预报的下一代物理启发人工智能
- 批准号:
NE/W009129/1 - 财政年份:2022
- 资助金额:
$ 251.86万 - 项目类别:
Fellowship
Exploiting Chalcogen Bonding and Non-Covalent Interactions in Isochalcogenourea Catalysis: Catalyst Preparation, Mechanistic Studies and Applications
在异硫属脲催化中利用硫属键合和非共价相互作用:催化剂制备、机理研究和应用
- 批准号:
EP/T023643/1 - 财政年份:2020
- 资助金额:
$ 251.86万 - 项目类别:
Research Grant
Video-Recordings of Eyewitness Identification in Actual Cases: The Postdictive Value of Eyewitness Behaviors
实际案件中目击者识别的录像:目击者行为的事后价值
- 批准号:
2017510 - 财政年份:2020
- 资助金额:
$ 251.86万 - 项目类别:
Continuing Grant
Underpinning Mechanistic Studies of NHC-Organocatalysis: A Breslow Intermediate Reactivity Scale
NHC 有机催化的基础机制研究:Breslow 中级反应量表
- 批准号:
EP/S019359/1 - 财政年份:2019
- 资助金额:
$ 251.86万 - 项目类别:
Research Grant
RUI: Collaborative Research: Assessments and Stances Regarding the Uncertainty of (Un)Desired Outcomes
RUI:协作研究:关于(不)期望结果的不确定性的评估和立场
- 批准号:
1851766 - 财政年份:2019
- 资助金额:
$ 251.86万 - 项目类别:
Continuing Grant
NSFPLR-NERC: GHOST (Geophysical Habitat of Subglacial Thwaites)
NSFPLR-NERC:GHOST(冰下思韦特斯地球物理栖息地)
- 批准号:
NE/S006672/1 - 财政年份:2018
- 资助金额:
$ 251.86万 - 项目类别:
Research Grant
REU Site: Frontiers in Biomedical Imaging
REU 网站:生物医学成像前沿
- 批准号:
1757837 - 财政年份:2018
- 资助金额:
$ 251.86万 - 项目类别:
Standard Grant
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