Structure and Dynamics of Earth's Core and Lowermost Mantle

建议摘要EAR0106544(PH#50x)标题：地球核心和最低地幔的结构和动力学：伊利诺伊大学香槟分校宋晓东该建议将在以下相关领域进行研究，涉及地球核心和最低地幔的结构和动力学。(1)该研究将寻求通过差动PKP走时测量和联合反演内核自转和内核和下地幔细小的横向结构来约束内核自转。这项研究还将处理在确定内核旋转方面的不确定性，特别是事件错位造成系统性偏差的可能性。(2)本研究将寻求通过模拟详细的波形和增加不同深度的内核的横向样本来约束内核的精细结构。(3)这项研究将寻求通过利用不同的走时和地震核相的波形来约束最下地幔的结构，以消除或减少上地幔不均质性和震源不确定性的偏差。

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