Imaging the multi-scale topography of the Earth's core

对地核的多尺度地形进行成像

• 批准号: 2696819
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2696819
• 关键词: Imaging; multi; scale; topography; Earth

Earth's core-mantle boundary (CMB) is the strongest physical and chemical discoutinuity within our planet. It separates the fluid outer core and solid mantle, with processes interacting at this interface that depend on the shape (topography) of the CMB. For example, the topography of the CMB influences the transfer of angular momentum between the core and mantle, which can lead to changes in the dynamic flow field in the outer core and consequently Earth's magnetic field (Tarduno et al., 2015). Reversely, the CMB topography is affected by the density and viscosity distribution in the lower mantle and outermost outer core through flow dynamics and isostasic compensation. These links can be utilised to constrain the structure of the highly heterogeneous lower mantle using constraints on the CMB topography (Deschamps, Rogister, and Tackley, 2018).

地球的地核-地幔边界（CMB）是地球上最强的物理和化学不连续。它分离了流体的外核和固体的地幔，在这个界面上的相互作用过程取决于CMB的形状（地形）。例如，CMB的地形会影响地核和地幔之间角动量的传递，从而导致外核动态流场的变化，从而导致地球磁场的变化（Tarduno et al., 2015）。相反，下地幔和最外层外核的密度和粘度分布通过流动动力学和均衡补偿对CMB地形产生影响。这些联系可以利用CMB地形的约束来约束高度非均质下地幔的结构（Deschamps, Rogister, and Tackley, 2018）。