FastTrip: A Fast MPI-Accelerated 1D Triplication Waveform Inversion Package for Constraining Mantle Transition Zone Discontinuities
FastTrip: A Fast MPI-Accelerated 1D Triplication Waveform Inversion Package for Constraining Mantle Transition Zone Discontinuities
复制标题
DOI：
10.1785/0220200475
复制
发表时间：
2021-05
影响因子：
3.3
通讯作者：
Jiaqi Li;Min Chen;K. Koper;T. Zhou;Z. Xi;Shaohua Li;Guoliang Li
中科院分区：
文献类型：
--
作者：
Jiaqi Li;Min Chen;K. Koper;T. Zhou;Z. Xi;Shaohua Li;Guoliang Li
410 公里和 660 公里的不连续面定义了地幔过渡带 (MTZ) 的顶部和底部。这些矿物学相变界面的特性对 MTZ 的动力学、温度和成分提供了关键约束。在这些不连续性附近底部的三重体波携带着有关它们的丰富信息。为了简化在区域距离（13°–30°）记录的上地幔三倍体的建模，我们开发了一种（快速）消息传递接口（MPI）加速的一维（Tr）倍增波形（I）反转（P）ackage（FastTrip）。以三倍波形数据作为输入，FastTrip 使用全局搜索方法输出一组可接受的一维速度模型。可以根据可接受模型的范围进一步导出模型不确定性的定量估计。 FastTrip 支持中央处理器 (CPU) 并行加速（100 个 CPU 在 2 小时内处理 15,000 个模型），并且可移植到可以通过相对少量的模型参数描述的其他反演问题。
The 410- and 660-km discontinuities define the top and bottom of the mantle transition zone (MTZ). The properties of these mineralogical phase transformation interfaces provide critical constraints on the dynamics, temperature, and composition of the MTZ. Triplicated body waves that bottom near these discontinuities carry rich information about them. To streamline the modeling of upper-mantle triplications recorded at regional distances (13°–30°), we have developed a (Fast) Message Passing Interface (MPI)-accelerated 1D (Tr)iplication Waveform (I)nversion (P)ackage (FastTrip). With triplication waveform data as input, FastTrip uses a global search method to output a set of acceptable 1D velocity models. Quantitative estimation of the model uncertainties can be further derived based on the range of acceptable models. FastTrip supports central processing unit (CPU) parallel acceleration (15,000 models within 2 hr with 100 CPUs) and is portable to other inversion problems that can be described by a relatively small number of model parameters.