NSF-SNSF: Dynamics of the Earth's core under the plesio-geostrophy paradigm
NSF-SNSF:准地转范式下的地核动力学
基本信息
- 批准号:2401254
- 负责人:
- 金额:$ 29.99万
- 依托单位:
- 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:2023-11-01 至 2025-10-31
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
NSF-SNSF: Dynamics of the Earth’s core under the plesio-geostrophy paradigmThree-dimensional numerical simulations are an important tool for understanding the origin of the Earth’s magnetic field. However, these tools must be used with caution because calculations with realistic parameter values are beyond the reach of current computational capabilities. Instead, the team proposes to develop a new class of simulations based on reduced complexity models. These models are designed to make approximations that exploit the extreme values of realistic model parameter. In effect, they take advantage of the very properties that make three-dimensional simulations impractical. The proposed research will undertake rigorous tests of the reduced complexity models in a variety of settings. The end goal is to simulate convection and magnetic-field generation in the Earth's core with unprecedented fidelity. This work will provide insights into the power needed to generate the Earth's magnetic field. The team will also gain an ability to forecast changes in the magnetic field by combining the reduced complexity models with prior observations, a process known as data assimilation. This is use-inspired research to enable reliable forecasting of the magnetic field. This enables the planning of space missions because changes in the magnetic field modulate the effect of solar and cosmic radiation on spacecraft . This collaborative effort is made possible through the National Science Foundation and Swiss National Science Foundation Lead Agency Opportunity.The team's specific research plan relies on several key elements. First, they will extend a new theoretical formulation of reduced complexity models called plesio-geostrophy. This formulation explicitly accounts for the influences of very low fluid viscosity and rapid planetary rotation. These are the two main barriers to conventional three-dimensional simulations. Second, they will address a long-standing challenge for all reduced complexity models by dealing with the special dynamics that occurs in the equatorial region. They will combine these elements to explore a hierarchy of problems to assess the efficiency of the PG formulation in capturing the correct physics in Earth's core. Success in confirming the reliability of the PG model will be a starting point for the problem of variational data assimilation. Outcomes of this project include a major contribution to research infrastructure by providing open-source software to enable researchers to investigate short-period dynamics of the core. It would also be the starting point for efforts to implement data assimilation methods. The team expects this work to produce novel insights into the dynamics of the Earth's core and to establish the groundwork for forecasting the geomagnetic field.This collaborative U.S.-Swiss project is supported by the U.S. National Science Foundation (NSF) and the Swiss National Science Foundation (SNSF), where NSF funds the U.S. investigator and SNSF funds the partners in Switzerland.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.
NSF-SNSF:准地转范式下的地核动力学三维数值模拟是理解地球磁场起源的重要工具。但是,必须谨慎使用这些工具,因为使用实际参数值的计算超出了当前计算能力的范围。相反,该团队建议基于降低复杂性的模型开发一类新的模拟。这些模型旨在利用真实模型参数的极值进行近似。实际上,它们利用了使三维模拟变得不切实际的特性。拟议的研究将在各种环境下对降低复杂性的模型进行严格的测试。最终目标是以前所未有的逼真度模拟地核的对流和磁场产生。这项工作将提供对产生地球磁场所需功率的洞察。该团队还将通过将降低复杂性的模型与先前的观测相结合,获得预测磁场变化的能力,这一过程被称为数据同化。这是一项受使用启发的研究,旨在实现对磁场的可靠预测。这使得能够规划空间飞行任务,因为磁场的变化调制了太阳和宇宙辐射对航天器的影响。这一合作努力是通过国家科学基金会和瑞士国家科学基金会牵头机构Opportunity实现的。团队的具体研究计划依赖于几个关键要素。首先,他们将推广一种新的降低复杂性模型的理论公式,称为准地质学。这个公式清楚地说明了极低的流体粘度和快速的行星自转的影响。这是传统三维模拟的两个主要障碍。其次,它们将通过处理赤道地区发生的特殊动态来解决所有降低复杂性的模型面临的长期挑战。他们将结合这些元素来探索问题的层次结构,以评估PG公式在捕捉地核正确物理方面的效率。成功地确认PG模式的可靠性将是变分资料同化问题的一个起点。该项目的成果包括通过提供开放源码软件使研究人员能够调查岩芯的短期动态,从而对研究基础设施作出重大贡献。它也将是实施数据同化方法的努力的起点。该团队希望这项工作将对地核的动力学产生新的见解,并为预测地磁场奠定基础。这一美国和瑞士的合作项目得到了美国国家科学基金会(NSF)和瑞士国家科学基金会(SNSF)的支持,其中NSF资助美国的研究人员,SNSF资助瑞士的合作伙伴。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(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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Bruce Buffett其他文献
Role reversal in geomagnetism
地磁场中的角色反转
- DOI:
10.1038/44724 - 发表时间:
1999-10-28 - 期刊:
- 影响因子:48.500
- 作者:
Bruce Buffett - 通讯作者:
Bruce Buffett
Role reversal in geomagnetism
地磁场中的角色反转
- DOI:
10.1038/44724 - 发表时间:
1999-10-28 - 期刊:
- 影响因子:48.500
- 作者:
Bruce Buffett - 通讯作者:
Bruce Buffett
A matter of boundaries
界限问题
- DOI:
10.1038/ngeo673 - 发表时间:
2009-11-01 - 期刊:
- 影响因子:16.100
- 作者:
Bruce Buffett - 通讯作者:
Bruce Buffett
A deep foundry
一家深度铸造厂
- DOI:
10.1038/473292a - 发表时间:
2011-05-18 - 期刊:
- 影响因子:48.500
- 作者:
Bruce Buffett - 通讯作者:
Bruce Buffett
Geomagnetism under scrutiny
地磁场正在受到审查
- DOI:
10.1038/485319a - 发表时间:
2012-05-16 - 期刊:
- 影响因子:48.500
- 作者:
Bruce Buffett - 通讯作者:
Bruce Buffett
Bruce Buffett的其他文献
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{{ truncateString('Bruce Buffett', 18)}}的其他基金
Data-driven detection of waves in Earth's core and geophysical interpretation
数据驱动的地核波探测和地球物理解释
- 批准号:
2214244 - 财政年份:2022
- 资助金额:
$ 29.99万 - 项目类别:
Standard Grant
CSEDI Collaborative Research: The Origins and Implications of Inner Core Seismic Anisotropy
CSEDI合作研究:内核地震各向异性的起源和意义
- 批准号:
2054964 - 财政年份:2021
- 资助金额:
$ 29.99万 - 项目类别:
Continuing Grant
Cooperative Institute for Dynamic Earth Research: Fluid and Magma Transport at Plate Boundaries
动态地球研究合作研究所:板块边界的流体和岩浆输送
- 批准号:
2025195 - 财政年份:2021
- 资助金额:
$ 29.99万 - 项目类别:
Standard Grant
Detecting and Inverting Magnetic Waves for the Structure and Dynamics of Earth's Core
探测和反演磁波以了解地核的结构和动力学
- 批准号:
1915807 - 财政年份:2019
- 资助金额:
$ 29.99万 - 项目类别:
Standard Grant
Cooperative Institute for Dynamic Earth Research
动力地球研究所合作研究所
- 批准号:
1903727 - 财政年份:2019
- 资助金额:
$ 29.99万 - 项目类别:
Standard Grant
Cooperative Institute for Dynamic Earth Research
动力地球研究所合作研究所
- 批准号:
1664595 - 财政年份:2018
- 资助金额:
$ 29.99万 - 项目类别:
Standard Grant
Interpreting the Paleomagnetic Field Using Stochastic Models
使用随机模型解释古磁场
- 批准号:
1644644 - 财政年份:2017
- 资助金额:
$ 29.99万 - 项目类别:
Continuing Grant
Geomagnetic Signals from the Earth's Core: Searching for Evidence of Waves and Stable Stratification
来自地核的地磁信号:寻找波和稳定层结的证据
- 批准号:
1430526 - 财政年份:2014
- 资助金额:
$ 29.99万 - 项目类别:
Standard Grant
Integrated Models of Mantle Convection and True Polar Wander, and the Structure of the Earth's Deep Interior
地幔对流和真实极地漂移的综合模型以及地球深层内部结构
- 批准号:
1246670 - 财政年份:2013
- 资助金额:
$ 29.99万 - 项目类别:
Standard Grant
CSEDI: Support for 13th SEDI Meeting in Leeds, UK
CSEDI:支持在英国利兹举行的第 13 届 SEDI 会议
- 批准号:
1228393 - 财政年份:2012
- 资助金额:
$ 29.99万 - 项目类别:
Standard Grant
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