Structure and Dynamics of Earth's Core and Lowermost Mantle

题目：地核与最下地幔的结构与动力学（Structure and Dynamics of Earth’s Core and最下地幔）项目发起人：宋晓东，美国伊利诺伊大学香槟分校（University of Illinois at urbana - champa佩恩）。该项目拟在以下相关领域开展地核与最下地幔的结构与动力学研究。(1)利用差分PKP走时测量、联合反演内核旋转和内核与下地幔精细横向结构，寻求对内核旋转的约束。本研究还将解决确定内核旋转的不确定性，特别是事件错位造成系统偏差的可能性。(2)本研究将通过详细的波形建模和增加内核不同深度的横向样本来寻求对内核精细结构的约束。(3)利用地震岩心相位的差分走时和波形，消除或减少上地幔非均质性和震源不确定性带来的偏差，对下地幔结构进行约束

Abstract for proposal EAR0106544 (PH # 50x)Title: Structure and Dynamics of Earth's Core and Lowermost MantlePI's: Xiaodong Song, University of Illinois at Urbana-ChampaignThis proposal is to conduct research in the following related areas concerning the structure and dynamics of Earth's core and lowermost mantle. (1) The study will seek to constrain the inner core rotation using differential PKP travel-time measurements and joint inversion of inner core rotation and fine lateral structure of inner core and lower mantle. This study will also address uncertainties in determining inner core rotation, in particular the possibility of systematic biases from event mislocation. (2) This study will seek to constrain fine structure of the inner core by modeling of detailed waveforms and increasing lateral samples of various depths of the inner core. (3) This study will seek to constrain the structure of lowermost mantle by using differential travel times and waveforms of seismic core phases, which remove or reduce biases from upper mantle heterogeneities and source uncertainties