Using ocean tidal load response to explore upper mantle density and elastic structure
利用海洋潮汐载荷响应探索上地幔密度和弹性结构
基本信息
- 批准号:1417245
- 负责人:
- 金额:$ 21.3万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2014
- 资助国家:美国
- 起止时间:2014-07-15 至 2017-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Seismology has revolutionized our understanding of the Earth's interior, but is also limited in its ability to distinguish between variations in different basic characteristics inside the Earth such between elastic properties and density. Constraining such properties is essential to the fundamental understanding of the evolution of the earth, the structure of continents and the processes driving plate tectonics. This project explores the use of a new observable that can complement seismology as a probe of the earth?s interior. Using global position system (GPS) estimates of ground movement, one can now detect the impact of the periodic movement of water mass associated with daily tides as they flex the surface of the earth due to the enormous weight of the moving oceans. Since the amount of flexing is directly controlled by interior properties of the solid earth, we can use these observations coupled with models of the ocean tides to constrain spatial variations in interior properties. This project focuses on both developing these new observation types and using them in models of the structure of the Earth's upper mantle with a particular focus on understanding the outermost 500 km of the Earth in the South American continent.Earth's ocean tidal load (OTL) response is manifest as horizontal and vertical spatial displacements up to 5-10 cm in amplitude and are regularly measured by GPS receivers with 1 mm accuracy at sub-daily tidal periods. Investigations into OTL response provide a direct means of testing scaling laws and assumptions commonly adopted in seismology to relate seismic velocities to fundamental rock properties, as well as a means of rejecting existing proposed models of the Earth that are inconsistent with the geodetic observations. Furthermore, inferred density and elasticity models can be used to address outstanding questions in geophysics, such as the long-term stability of continental cratons against tectonic deformation. A byproduct of this effort will be the development of computational infrastructure to invert tidal observations in a Bayesian framework.
地震学已经彻底改变了我们对地球内部的理解,但它在区分地球内部不同基本特性的变化方面的能力也有限,例如弹性特性和密度之间的变化。 限制这些性质对于从根本上理解地球的演化、大陆的结构和驱动板块构造的过程至关重要。 这个项目探索使用一种新的可观测的,可以补充地震学作为地球探测器?的内部。 利用全球定位系统对地面运动的估计,人们现在可以探测到与每日潮汐有关的水团周期性运动的影响,因为它们由于移动海洋的巨大重量而弯曲地球表面。 由于弯曲的量直接由固体地球的内部属性控制,我们可以使用这些观测结果与海洋潮汐模型相结合,以限制内部属性的空间变化。 该项目的重点是开发这些新的观测类型,并将其用于地球上地幔结构的模型中,特别侧重于了解南美洲大陆地球最外500公里的地球。地球的海洋潮汐负荷(OTL)响应表现为水平和垂直空间位移,最大可达5- 1000米。振幅为10厘米,由全球定位系统接收器定期测量,精度为1毫米。 对OTL响应的调查提供了一种直接的方法来检验地震学中普遍采用的标度律和假设,以将地震速度与基本岩石性质联系起来,同时也提供了一种方法来拒绝现有的与大地测量观测不一致的地球模型。此外,推断的密度和弹性模型可以用来解决地球物理学中的突出问题,如大陆板块的长期稳定性对构造变形。这一努力的副产品将是计算基础设施的发展,在贝叶斯框架内反演潮汐观测。
项目成果
期刊论文数量(0)
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会议论文数量(0)
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Mark Simons其他文献
Jet activity on Enceladus linked to tidally driven strike-slip motion along tiger stripes
土卫二上的射流活动与沿虎纹带的潮汐驱动走滑运动有关
- DOI:
10.1038/s41561-024-01418-0 - 发表时间:
2024-04-29 - 期刊:
- 影响因子:16.100
- 作者:
Alexander Berne;Mark Simons;James T. Keane;Erin J. Leonard;Ryan S. Park - 通讯作者:
Ryan S. Park
The elastic response to ocean tidal loading estimated from GPS observations in the western United States
根据美国西部 GPS 观测估计的海洋潮汐载荷的弹性响应
- DOI:
- 发表时间:
2009 - 期刊:
- 影响因子:0
- 作者:
T.Ito;Mark Simons - 通讯作者:
Mark Simons
Strain Accumulation and Release in the Himalaya from ALOS-2 InSAR Analysis
ALOS-2 InSAR 分析中喜马拉雅地区应变的积累和释放
- DOI:
10.1109/igarss52108.2023.10283012 - 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Niloufar Abolfathian;Eric Fielding;Sreejith K. M.;M. Jasir;R. Agrawal;Mark Simons - 通讯作者:
Mark Simons
Performance Analysis of A Repeat-Pass Insar Mission for Deformation and Topography Mapping of Saturn’s Moon Enceladus
土星卫星土卫二变形和地形测绘重复通过 Insar 任务的性能分析
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Andreas Benedikter;Paul Rosen;Mark Simons;Ryan Park;M. Rodríguez;P. Prats;G. Krieger;Jalal Matar - 通讯作者:
Jalal Matar
スマトラ島北西部のスマトラ断層における地震発生ポテンシャル
苏门答腊岛西北部苏门答腊断层的地震潜力
- DOI:
- 发表时间:
2010 - 期刊:
- 影响因子:0
- 作者:
2)伊藤武男,Gunawan,木股文昭,田部井隆雄;Irwandi;Agstan,Irwan Meilano;Mark Simons - 通讯作者:
Mark Simons
Mark Simons的其他文献
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{{ truncateString('Mark Simons', 18)}}的其他基金
A new generation of earthquake source models- Past, present and future
新一代震源模型——过去、现在和未来
- 批准号:
1447107 - 财政年份:2015
- 资助金额:
$ 21.3万 - 项目类别:
Continuing Grant
Collaborative Research: Great Earthquakes, Megathrust Phenomenology and Continental Dynamics in the Southern Andes
合作研究:安第斯山脉南部的大地震、巨型逆冲现象学和大陆动力学
- 批准号:
1118239 - 财政年份:2011
- 资助金额:
$ 21.3万 - 项目类别:
Continuing Grant
CDI-Type I- Bringing a Bayesian perspective to the study of large earthquakes and their impacts on the built environment
CDI-I 型 - 将贝叶斯视角引入大地震及其对建筑环境影响的研究
- 批准号:
0941374 - 财政年份:2010
- 资助金额:
$ 21.3万 - 项目类别:
Standard Grant
Three-dimensional modeling of interseismic, co-seismic, and post-seismic deformation in Taiwan
台湾震间、同震和震后形变的三维建模
- 批准号:
0537625 - 财政年份:2006
- 资助金额:
$ 21.3万 - 项目类别:
Standard Grant
Collaborative Research: Interpreting High Resolution Geodetic Data With Viscoelastic Models
合作研究:用粘弹性模型解释高分辨率大地测量数据
- 批准号:
0229868 - 财政年份:2002
- 资助金额:
$ 21.3万 - 项目类别:
Standard Grant
Emplacement of Large Crustal Sills and The Mechanics of Magmatic Underplating
大型地壳基台的侵位与岩浆底侵机制
- 批准号:
9980664 - 财政年份:2000
- 资助金额:
$ 21.3万 - 项目类别:
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Constraints on the Dynamics of Temperate Ice Caps in Iceland from Radar Interferometry
雷达干涉测量对冰岛温带冰盖动力学的约束
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9813029 - 财政年份:1998
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通过机器学习架构优化设计潮汐/海洋发电机
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