Rapid prototyping, interactive visualization and data validation methods for models of planetary interiors
Abstract
Multi-disciplinary advancements in our understanding of terrestrial planets have motivated a proliferation in models of the deep interior. Reconciling seismic models and data with simulations from geodynamics, mineral physics and geochemistry is crucial for robust thermo-chemical interpretations. Such inter-disciplinary initiatives have been impeded by discrepant spatial scales, observational or theoretical assumptions and lack of data validation algorithms. We present methods and data formats that will facilitate rapid prototyping of multi-scale models by reconciling and assimilating features ranging from reservoir (~0.1 - 10 km) to global scales (~500 - 5000 km). Our approach involves three complementary aspects: (1) scalable model classes and formats with archival of metadata, (2) web-applets for visualization and outlier analysis and (3) data validation with fast, benchmarked forward solvers. Our formats and custom classes can store and analyze various (an)elastic and thermodynamic parameters expressed in different parameterization schemes inside a scalable container format. Models expressed with our classes can be re-parameterized in terms of other basis functions, appended with other variable-scale models and visualized interactively with web-based applets. Forward solvers for body- and surface-wave data are served to the community as an application programming interface (API) to facilitate data validation of candidate planetary models . F or isotropic Earth models such as AK135, anisotropic body-wave ray tracer predicts arrival times that are consistent with an isotropic tracer to within +/- 0.2 s for all mantle and core phases. Ignoring radial anisotropy in ray tracing through anisotropic PREM and NREM1D leads to baseline differences (> 1 s) for several phases (e.g. SS, SKS, ScSn), which is substantial relative to the signal used in tomographic inversions. A method is introduced to solve instantaneously for arrival times between arbitrary locations in a three-dimensional heterogeneous planet. By coupling existing, reconciled observations with predictions for arbitrary locations, our methodology will be useful for identifying regions of scientific interest, validating techniques, planning seismic deployments, and testing hypotheses on planetary deep interiors.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMDI41D0020M
- Keywords:
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- 1038 Mantle processes;
- GEOCHEMISTRY;
- 7270 Tomography;
- SEISMOLOGY;
- 8115 Core processes;
- TECTONOPHYSICS;
- 8120 Dynamics of lithosphere and mantle: general;
- TECTONOPHYSICS