Resolving the Structure and Rotation of the Inner Core

9706201宋这项研究涉及到对以前关于地球内核差异自转的发现的扩展。波形模拟和岩心相位差分时间测量(PKP)已经成功地对核心层的P波各向异性、结构和旋转有了新的认识。使用同一震源的相对观测(波形、差分时间)的方法消除了对震源起源时间、激发、错位和震源和接收器下方地壳和上地幔速度不确定性的担忧。将收集更多的差异数据，以反转旋转内核的框架中内核的各向异性/衰减结构。***

9706201 Song This research involves the expansion of previous findings concerning the differential rotation of the earth's inner core. Waveform modeling and differential time measurements of core phases (PKP) have successfully led to new insights on both the P- wave anisotropy, structure and rotation of the inner core. The approach of using relative observations (waveforms, differential times) with a common source eliminates the concern about uncertainties in source origin time, excitation, mislocation, and velocity uncertainties in the crust and upper mantle under the source and receiver. More differential data will be assembled to invert the anisotropy/attenuation structure of the inner core in a frame of a spinning inner core. ***