U.S.-Japan Cooperative Science: Seismological Study of the Upper Mantle Transition Zone Associated with Northwestern Pacific Subduction Zones

9603327田岛该奖项资助了奥斯汀得克萨斯大学的田岛文子教授、西北大学的克雷格·比纳教授和日本东京大学地震研究所的福尾义夫博士之间为期一年的合作研究项目。该项目涉及与西北太平洋俯冲带有关的上地幔过渡带的地震学研究。该项目的主要目标是改进层析反演法产生的三维图像。该项目汇集了两个主要实验室的努力，这两个实验室构成了这一过程的不同部分：美国人将为地幔和俯冲带制作热和整体成分模型，日本人将修正残差，并修改3D旅行时间反演代码，以包括稍后到达的旅行时间数据。400-700公里深度上地幔过渡带的地震结构对于了解地幔内部的对流模式具有重要意义。改进三维全地幔层析模型将有助于更好地了解这种结构。通过思想和技术的交流，这个项目将扩大我们的基础知识基础，促进国际理解与合作。***

9603327 Tajima This award supports a one year collaborative research project between Professor Fumiko Tajima of the University of Texas in Austin, Professor Craig Bina of Northwestern University and Dr. Yoshio Fukao of the Earthquake Research Institute at the University of Tokyo in Japan. This project involves a seismological study of the upper mantle transition zone associated with the Northwestern Pacific subduction zones. The major goal of this project is to improve the 3-D images produced by tomographic inversion. The project brings together the efforts of two major laboratories that have constituted different parts of the process: the Americans will produce thermal and bulk compositional models for the mantle and subduction zone and the Japanese will correct for residuals and modify the 3-D travel time inversion code to include travel time data for later arrivals. The seismic structure of the upper mantle transition zone, from 400-700 km depth is of fundamental importance for understanding the mode of convection within the Earth's mantle. Improving the 3-D whole mantle tomographic models will provide for better understanding of this structure. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation. ***