Presidential Faculty Fellow/Presidential Early Career Awards for Scientists and Engineers (PFF/PECASE)

9629018周末，P.I.S的研究涉及到利用地震学绘制地球内部的地图，并对这些地图进行解读，以了解地球是由什么构成的，以及它是如何运作的。就像医生使用超声波或CAT扫描来为病人成像一样，他使用来自大地震的反射和折射波来成像地球。这一最重大的贡献来自于地核和地幔之间高度可变的边界的测绘，地核和地幔之间的边界距离我们星球的中心有一半的距离。这些信息帮助改变了地质学家对地球内部工作的动态过程的看法。在接下来的五年里，他将继续在几个方向上发展他的地球结构测绘研究计划。他将专注于核-地幔边界区域，但也将研究地球的其他区域，包括地核、410和660公里深处的橄榄石相变，以及扩张板块边界下的上地幔结构。

9629018 Wysession The P.I.'s research involves using seismology to map the interior of the Earth, and interpreting these maps to understand the big picture of what our planet is made of and how it works. Just as medical doctors use a sonogram or CAT-scan to image a patient, he uses the reflecting and refracting waves from large earthquakes to image the Earth. This most significant contributions have come through the mapping of the highly variable boundary between Earth's core and mantle, half-way to the center of our planet. This information has helped change the ways geologists perceive the dynamic processes at work inside the Earth. Over the next five years he will continue to develop his research program in the mapping of Earth structure in several directions. He will concentrate on the core-mantle boundary region, but will examine other regions of the Earth, including the Earth's core, the olivine phase transitions at depths of 410 and 660 km, and the upper mantle structure beneath spreading plate boundaries.