Dynamics of earth and planetary interiors

地球和行星内部的动力学

• 批准号: 217591-2008
• 负责人: Heimpel, Moritz
• 金额: $ 1.64万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=424958
• 关键词: Dynamics; earth; planetary; interiors

The Earth and other planets of our solar system are dynamical bodies from their surfaces to their cores. Studies in comparative planetology address the dynamical history of the Earth and planets, the nature of large scale planetary turbulence, the origins of the geomagnetic planetary magnetic fields, the origin of life on Earth and the possibility of life on Mars. We use numerical models of planetary convection along with observational and analytical methods in projects that range from integrated studies of global and regional seismology and the dynamics of solid-state convection in the Earth's mantle to numerical simulations of winds and magnetic fields of the outer planets. The mantle dynamics and seismology study is aimed at understanding the fate of subducting slabs as they interact with the upper mantle transition zone and penetrate into the deep mantle. This work is being carried out with a PhD student and in collaboration with the global seismology group at U of A. In the planetary dynamics models, numerical simulations are compared to models derived from previous and ongoing space missions (such as the Cassini spacecraft, currently orbiting Saturn). This work is in collaboration with researchers from UCLA and the Max Planck Institute for Solar System research in Lindau, Germany. Coupled models of convective dynamo action and solar wind - magnetosphere interaction are presently being developed to study the Earth, Mercury and Mars. These models help us to understand Mercury's intrinsic and relatively weak magnetic field, which will be mapped by the MESSENGER spacecraft, starting with a flyby through the magnetosphere in January, 2008 and orbit insertion in 2011. Collaborators include the Space Physics group at U of A, and the Carnegie Institution in Washington DC -- home of the MESSENGER mission. A planned project on the early Mars dynamo will integrate core, mantle, amospheric, and magnetospheric dynamics. This project will benefit greatly from interdepartmental interaction through the newly created Institute for Space Science, Exploration and Technology (ISSET) at the University of Alberta.

地球和我们太阳系的其他行星从它们的表面到核心都是动态的天体。比较行星学的研究涉及地球和行星的动力史、大规模行星湍流的性质、地磁行星磁场的起源、地球上生命的起源以及火星上生命存在的可能性。我们在各种项目中使用行星对流的数值模型以及观测和分析方法，这些项目包括对全球和区域地震学以及地幔固体对流动力学的综合研究，以及对外行星风场和磁场的数值模拟。地幔动力学和地震学研究旨在了解俯冲板块与上地幔过渡带相互作用并侵入深部地幔时的命运。这项工作是与一名博士生一起进行的，并与阿肯色州大学的全球地震学小组合作。在行星动力学模型中，数值模拟与之前和正在进行的太空任务(如目前绕土星运行的卡西尼号航天器)的模型进行了比较。这项工作是与加州大学洛杉矶分校和德国林道的马克斯·普朗克太阳系研究所的研究人员合作进行的。目前正在开发对流发电机作用和太阳风-磁层相互作用的耦合模型来研究地球、水星和火星。这些模型有助于我们理解水星的内在磁场和相对较弱的磁场，信使号航天器将绘制出这一磁场图，从2008年1月飞越磁层开始，并于2011年进入轨道。合作者包括美国大学的空间物理小组和华盛顿特区的卡内基研究所--信使任务的发源地。一项关于早期火星发电机的计划项目将整合核心、地幔、非电离层和磁层动力学。该项目将通过阿尔伯塔大学新成立的空间科学、探索和技术研究所(空间科学、探索和技术研究所)从部门间互动中受益匪浅。