Joint Seismic and Geodynamic Inversion for Whole Mantle Structure

本项目的目标是：(1)通过大地水准面/地震数据联合拟合，更好地约束地幔的黏度和流动结构；(2)建立体波（S和P）、面波和正态数据的自洽反演方案，在地震反演过程中考虑任何内部密度异常引起的边界变形的影响；(3)通过二维和三维数值实验和地震数据对比，探讨相变和侧向（温度依赖）粘度变化对地幔内部结构和大地水准面的影响。

The goals of this project are (1) To better constrain the viscosity and flow structure of the mantle through joint geoid/seismic data fitting, (2) develop a self-consistent inversion scheme for the body wave (S and P), surface wave, and normal mode data that includes in the seismic inversion process the effects due to the boundary deformations induced by any internal density anomalies, and (3) explore the effects of phase transitions and lateral (temperature-dependent) viscosity variations on internal mantle structure and the geoid through 2-D and 3-D numerical experiments and seismic dataset intercomparisons.