Dynamic Simulations of Oceanic and Continental Plates & Eustatic Sea Level

海洋板块和大陆板块的动态模拟

• 批准号: 8904660
• 负责人: Michael Gurnis
• 金额: $ 9万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-12-15 至 1992-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8904660&HistoricalAwards=false
• 关键词: Dynamic; Simulations; Oceanic; Continental; Plates

The PI will develop dynamically self-consistent simulations of the plate/mantle system. In these simulations, non-subducting continental masses will interact with ridges, subducting slabs, and long wavelength temperature anomalies in the interior of the fluid. The dynamic topography will be computed on the top surface of the fluid, from which eustatic sea level fluctuations will be computed for the continental masses. The resulting simulations will be compared to the history of oceanic ridge spreading over the last 150 my, the history of subduction, the history of eustatic sea-level over the last 500 my paleogeographic positions of the continents, and present day seismic tomography and geoid. Through comparison of the numerical experiments with geophysical and geological observations, one will obtain an unprecedented view of the physics of sea level change.

PI将对板块/地幔系统进行动态自洽模拟。在这些模拟中，非俯冲大陆块体将与脊、俯冲板块和流体内部的长波温度异常相互作用。将在流体的上表面计算动力地形，由此计算大陆块体的海平面波动。模拟结果将与过去150年来洋脊扩张的历史、俯冲的历史、过去500年来大陆古地理位置的海平面上升的历史以及当今的地震层析成像和大地水准面进行比较。通过数值实验与地球物理和地质观测的比较，人们将获得一个前所未有的海平面变化的物理学观点。