权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Collaborative Research: GreenDrill: The response of the northern Greenland Ice Sheet to Arctic Warmth - Direct constrains from sub-ice bedrock

合作研究：GreenDrill：格陵兰岛北部冰盖对北极温暖的响应 - 来自冰下基岩的直接限制

基本信息

批准号：
1934477
负责人：
Robert DeConto
金额：
$ 44.93万
依托单位：
University of Massachusetts Amherst
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-10-01 至 2024-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1934477&HistoricalAwards=false
关键词：
Collaborative Research GreenDrill response northern

项目摘要

The GreenDrill project is motivated by a need to understand past and future change in the extent of the Greenland Ice Sheet. The Greenland Ice Sheet (GrIS) holds about 24 feet (7.4 m) of sea level equivalent, yet it remains difficult to predict the rate of melt and possible tipping points in the stability of the ice sheet. In GreenDrill, the team of investigators will sample bedrock from under ice at sites in northern Greenland, analyzing cosmogenic nuclides to determine past periods of ice free conditions. These data will provide better understanding of how this region of the GrIS has responded to warm periods in the past. The team will also use these data in computer models to place results in the context of the entire ice sheet to explore mechanisms and climate forcing driving past periods of ice sheet disintegration, which in turn will inform projections of future ice sheet behavior and sea level rise. In addition to the high relevance of this research to society, the GreenDrill project includes broader impacts such as development of a new television episode called Adventures in Science, educational programs for middle and high school students via the Scientists are Superheroes program, and training for early career postdoctoral scientists, graduate students, and undergraduates.In this project, the investigators propose to gather new data to test the sensitivity of the northern Greenland Ice Sheet (GrIS) and its potential to contribute to sea level rise in the future. Specifically, data from the GreenDrill project will better constrain the response of the GrIS to past periods of warmth and address the hypothesis that the northern GrIS is more sensitive to Arctic warming than the southern GrIS. The team will drill through the ice at sites in northern Greenland, sample bedrock obtained from those cores, and analyze a suite of cosmogenic nuclides (Beryllium-10, Aluminum-26, Chlorine-36, Carbon-14, and Neon-21) that can act as signatures of changes to the GrIS margin. These data will deliver direct observations of periods when the GrIS was substantially smaller than today and ice sheet margins retreated inland. Results will be incorporated into a numerical ice sheet model with a built-in cosmogenic nuclide module to identify plausible ice sheet histories. The modeling experiments will help understand the mechanisms and climate forcing underlying past periods of ice sheet retreat and help inform predictions of the future. Based on the melting scenarios, a first-order map of sea level rise fingerprints and inundation scenarios for major port cities will be produced.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

绿色钻探项目的动机是需要了解格陵兰冰盖范围过去和未来的变化。格陵兰冰盖(GRIS)相当于大约24英尺(7.4米)的海平面，但仍然很难预测冰盖的融化速度和可能的临界点。在GreenDrill，研究小组将从格陵兰岛北部一些地点的冰下基岩中取样，分析宇宙成因核素，以确定过去的无冰条件。这些数据将使我们更好地了解这一区域对过去暖期的反应。该团队还将使用计算机模型中的这些数据，将结果放在整个冰盖的背景下，以探索推动过去冰盖解体的机制和气候强迫，这反过来将为对未来冰盖行为和海平面上升的预测提供信息。除了这项研究对社会的高度相关性，GreenDrill项目还包括更广泛的影响，如开发一部名为《科学冒险》的新电视连续剧，通过科学家是超级英雄计划为初中生和高中生提供教育项目，以及对早期职业博士后科学家、研究生和本科生的培训。在这个项目中，研究人员提议收集新的数据来测试格陵兰北部冰盖(GRIS)的敏感性及其对未来海平面上升的潜在贡献。具体地说，来自GreenDrill项目的数据将更好地限制灰熊对过去温暖时期的反应，并解决北方灰熊比南方灰熊对北极变暖更敏感的假设。该团队将在格陵兰岛北部的冰层中钻探，从这些岩芯中提取基岩样本，并分析一套宇宙成因核素(铍-10、铝-26、氯-36、碳-14和霓虹-21)，这些核素可以作为GRIS边缘变化的标志。这些数据将提供对GRI比今天小得多、冰盖边缘向内陆后退的时期的直接观测。结果将被合并到一个带有内置宇宙成因核素模块的数值冰盖模型中，以确定可信的冰盖历史。模拟实验将有助于理解过去冰盖退缩背后的机制和气候强迫，并有助于为未来的预测提供信息。基于融化情景，将制作主要港口城市海平面上升指纹和淹没情景的一阶地图。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（6）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Iceberg Calving: Regimes and Transitions

冰山崩解：制度和转变

DOI：
10.1146/annurev-earth-032320-110916
发表时间：
2023
期刊：
Annual Review of Earth and Planetary Sciences
影响因子：
14.9
作者：
Alley, R.B.;Cuffey, K.M.;Bassis, J.N.;Alley, K.E.;Wang, S.;Parizek, B.R.;Anandakrishnan, S.;Christianson, K.;DeConto, R.M.
通讯作者：
DeConto, R.M.

The Paris Agreement and Climate Justice: Inequitable Impacts of Sea Level Rise Associated With Temperature Targets

DOI：
10.1029/2022ef002940
发表时间：
2021-11
期刊：
Earth's Future
影响因子：
0
作者：
Shaina Sadai;R. Spector;R. DeConto;N. Gomez
通讯作者：
Shaina Sadai;R. Spector;R. DeConto;N. Gomez

The Influence of the Solid Earth on the Contribution of Marine Sections of the Antarctic Ice Sheet to Future Sea‐Level Change

固体地球对南极冰盖海洋部分对未来海平面变化的影响

DOI：
10.1029/2021gl097525
发表时间：
2022
期刊：
Geophysical Research Letters
影响因子：
5.2
作者：
Yousefi, M.;Wan, J.;Pan, L.;Gomez, N.;Latychev, K.;Mitrovica, J. X.;Pollard, D.;DeConto, R. M.
通讯作者：
DeConto, R. M.

Modeling Northern Hemispheric Ice Sheet Dynamics, Sea Level Change, and Solid Earth Deformation Through the Last Glacial Cycle