THETIS: Thetis modeling of the Heterogenous Environment beneath Thwaites Ice Shelf

THETIS：思韦茨冰架下异质环境的 Thetis 建模

基本信息

批准号：
2151295
负责人：
David Holland
金额：
$ 58.8万
依托单位：
New York University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2023
资助国家：
美国
起止时间：
2023-01-01 至 2025-12-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2151295&HistoricalAwards=false
关键词：
THETIS Thetis modeling Heterogenous Environment

项目摘要

The current, rapid melting of Thwaites Glacier in Antarctica and its ongoing contribution to sea-level rise are of broad societal concern for their potential to impact coastal communities around the globe. Sea-level rise more than three meters due to the eventual collapse of this glacier and its neighbors could displace millions. The results of this research will help to project the future behavior of this critical glacier by combining observations and computer modeling of the glacier. The results will also advance the ability to estimate the future sea-level contribution of this glacier and contribute to the broader effort of the International Thwaites Glacier Collaboration to provide better insight into future societal impacts. In addition, this project will contribute to the training and career development of a postdoctoral scholar.This project will develop a computational model of the ocean around and beneath the Thwaites Glacier Ice Shelf in Antarctica. The project will develop Thetis, an unstructured-mesh, discontinuous Galerkin finite-element ocean model to simulate ocean circulation within the glacier sub-ice-shelf ocean cavity. The unstructured mesh will allow for increased resolution in important regions, such as the grounding zone, and regions with complex coastal geometry, effectively concentrating computational resources where they are needed most. The unstructured mesh will also allow for smooth representations of coastal, seabed, and ice-base geometry, an improvement over the stair-step style boundaries of commonly used structured mesh models. The model developed for this project will not only be the most detailed model of the Thwaites Glacier ocean cavity, it will also represent a step forward for modeling of ocean-ice interaction in general.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.

目前南极洲思韦茨冰川的快速融化及其对海平面上升的持续影响引起了社会的广泛关注，因为它们可能对全球沿海社区产生影响。由于这座冰川及其邻近冰川的最终崩塌，海平面上升超过三米，可能导致数百万人流离失所。这项研究的结果将有助于通过结合冰川的观测和计算机建模来预测这个关键冰川的未来行为。研究结果还将提高估计该冰川未来海平面贡献的能力，并有助于国际思韦茨冰川合作组织更广泛的努力，以更好地了解未来的社会影响。此外，该项目还将有助于博士后学者的培训和职业发展。该项目将开发南极洲思韦茨冰川冰架周围和下方海洋的计算模型。该项目将开发 Thetis，一种非结构化网格、不连续 Galerkin 有限元海洋模型，用于模拟冰川冰架下洋腔内的海洋环流。非结构化网格将提高重要区域（例如接地区和具有复杂海岸几何形状的区域）的分辨率，从而有效地将计算资源集中在最需要的地方。非结构化网格还可以平滑地表示沿海、海底和冰基几何形状，这是对常用结构化网格模型的阶梯式边界的改进。为该项目开发的模型不仅将成为思韦茨冰川洋腔最详细的模型，而且还将代表着海洋与冰相互作用建模的总体进步。该奖项反映了 NSF 的法定使命，并被认为是值得的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来提供支持。