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，南极的Thwaites冰川的快速融化及其对海平面上升的持续贡献对它们影响全球沿海社区的潜力引起了广泛的社会关注。由于这个冰川及其邻居最终崩溃，海平面上升超过三米，可能会取代数百万。这项研究的结果将通过结合冰川的观测和计算机建模来帮助投影这种关键冰川的未来行为。结果还将提高估计这种冰川的未来海平面贡献的能力，并为国际Thwaites冰川合作的更广泛努力做出贡献，以更好地了解未来的社会影响。此外，该项目将有助于博士后学者的培训和职业发展。该项目将开发出南极的Thwaites Glacier Ice架的海洋计算模型。该项目将开发Thetis，这是一种非结构化的网格，不连续的Galerkin有限元元素模型，以模拟冰川子冰架海洋腔内的海洋循环。非结构化的网格将允许在重要区域（例如接地区）以及具有复杂沿海几何形状的区域增加分辨率，从而有效地集中了最需要的计算资源。非结构化的网格还将允许平滑地表示沿海，海床和冰基几何形状，这是对常用结构化网格模型的楼梯 - 步骤风格边界的改进。为该项目开发的模型不仅将是Thwaites冰川海洋腔的最详细模型，而且还将代表一般的海洋冰互动建模的一步。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准来通过评估来获得支持的。