Pillars of the Mantle: Imaging the Interior of the Earth with Adjoint Tomography. In: PEARC17 Proceedings of the Practice and Experience in Advanced Research Computing 2017 on Sustainability, Success and Impact, Article No. 75

Conference · Sun Jan 01 00:00:00 EST 2017

DOI:https://doi.org/10.1145/3093338.3104170· OSTI ID:1567648

Pugmire, David ^[1]; Bozdağ, Ebru ^[2]; Lefebvre, Matthieu ^[3]; Tromp, Jeroen ^[3]; Komatitsch, Dmitri ^[4]; Peter, Daniel ^[5]; Podhorszki, Norbert ^[1]; Hill, Judith ^[1]

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1. Oak Ridge National Laboratory
2. Colorado School of Mines
3. Princeton University
4. University of Aix-Marseille
5. King Abdullah University of Science and Technology

In this work, we investigate global seismic tomographic models obtained by spectral-element simulations of seismic wave propagation and adjoint methods. Global crustal and mantle models are obtained based on an iterative conjugate-gradient type of optimization scheme. Forward and adjoint seismic wave propagation simulations, which result in synthetic seismic data to make measurements and data sensitivity kernels to compute gradient for model updates, respectively, are performed by the SPECFEM3D_GLOBE package [1] [2] at the Oak Ridge Leadership Computing Facility (OLCF) to study the structure of the Earth at unprecedented levels. Using advances in solver techniques that run on the GPUs on Titan at the OLCF, scientists are able to perform large-scale seismic inverse modeling and imaging. Using seismic data from global and regional networks from global CMT earthquakes, scientists are using SPECFEM3D_GLOBE to understand the structure of the mantle layer of the Earth. Visualization of the generated data sets provide an effective way to understand the computed wave perturbations which define the structure of mantle in the Earth.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
• Sponsoring Organization: USDOE Office of Science (SC)
• OSTI ID: 1567648
• Resource Relation: Conference: Practice and Experience in Advanced Research Computing 2017 on Sustainability, Success and Impact, New Orleans, LA, USA, July 09 - 13, 2017
• Country of Publication: United States
• Language: English