Data Services Products: EMC-GLAD-M15 Global adjoint tomography: first-generation model

Summary

GLAD-M15 is an elastic model with radial anisotropy confined to the upper mantle, similar to its predecessor S362ANI. The 1-D reference model is STW105.

Description

Name GLAD-M15
Title Global adjoint tomography: first-generation model
Type 3-D Tomography Earth Model
Sub Type Anisotropic (in the uppermost mantle)
Year 2016
Data Revision r.0.0 (revision history)
 
Short Description   GLAD-M15 is an elastic model with radial anisotropy confined to the upper mantle, similar to its predecessor S362ANI. The 1-D reference model is STW105.
 
Authors: Ebru Bozdağ:
Department of Geophysics
Colorado School of Mines
Golden, USA

Daniel Peter:
Extreme Computing Research Center
King Abdullah University of Science and Technology (KAUST)
Thuwal, Kingdom of Saudi Arabia

Matthieu Lefebvre:
Department of Geosciences
Princeton University
Princeton, USA

Dimitri Komatitsch:
LMA
Aix-Marseille University
Centrale Marseille, France

Jeroen Tromp:
Department of Geosciences
Princeton University
Princeton, USA

Judith Hill:
Oak Ridge National Laboratory
Oak Ridge, USA

Norbert Podhorszki:
Oak Ridge National Laboratory
Oak Ridge, USA

David Pugmire:
Oak Ridge National Laboratory
Oak Ridge, USA
 
Author of parametrization: Caio Ciardelli:
Department of Geophysics
Institute of Astronomy, Geophysics and Atmospheric Sciences – USP
São Paulo, Brazil
 
Previous Model S362ANI
Reference Model STW105
Model Download
 
Usage Notes   SphGLLTools (Ciardelli et al., 2021) is a toolbox for visualization, processing, sharing, and spherical harmonics analysis of tomographic models defined on GLL meshes that could be used with the full-resolution model.
 
Model Homepage https://github.com/caiociardelli/gladm15
Depth Coverage Whole Mantle (25 to 2890 km)
Area Global (latitudes: -90°/90°, longitudes: -180°/180°)
 
Data Set Description 253 earthquakes in the moment-magnitude range 5.8 ≤ M w ≤ 7.0. The events were chosen to provide broad geographical coverage, including shallow (depth ≤ 50 km), intermediate (50 km > depth > 300 km), and deep (depth ≥ 300 km) events. Because we used relatively long-period data (>17 s) and events with magnitudes less than 7, we chose a Centroid Moment-Tensor (CMT) pointsource earthquake representation. We used four M w = 5.8 earthquakes from the East African Rift Valley and the Eastern US (the 2011 Virginia earthquake) to improve coverage, since higher-magnitude events are not observed in these regions. Initial CMT solutions were selected from the global CMT catalogue.

GLAD-M17 Map views
Figure modified from Bozdağ et. al, 2016: Map view at 450 km depth (top) and vertical crosssection (bottom) of vertically polarized shear-wave-speed perturbations in GLAD-M15 under Antarctica.

Citations and DOIs

To cite the original work behind this Earth model:

  • Bozdağ, E., Peter, D., Lefebvre, M., Komatitsch, D., Tromp, J., Hill, J., Podhorszki, N., Pugmire, D., 2016. Global adjoint tomography: first-generation model. Geophysical Journal International 207, 1739–1766. URL: https://doi.org/10.1093/gji/ggw356.

To cite the model parametrization effort: *Ciardelli, C., Bozdağ, E., Peter, D., & Van der Lee, S. (2022). SphGLLTools: A toolbox for visualization of large seismic model files based on 3D spectral-element meshes. Computers & Geosciences, 159, 105007, https://doi.org/10.1016/j.cageo.2021.105007

To cite IRIS DMC Data Products effort:

  • Trabant, C., A. R. Hutko, M. Bahavar, R. Karstens, T. Ahern, and R. Aster (2012), Data Products at the IRIS DMC: Stepping Stones for Research and Other Applications, Seismological Research Letters, 83(5), 846–854, https://doi.org/10.1785/0220120032.

DOI for this EMC webpage: https://doi.org/10.17611/dp/emc.2020.gladm1500.1

References

  • Ciardelli, C., Bozdağ, E., Peter, D., and van der Lee, S., 2021. SphGLLTools: A toolbox for visualization of large seismic model files based on 3D spectral-element meshes. Computer & Geosciences, v. 159, 105007, https://doi.org/20.1016/j.cageo.2021.105007.

Credits

  • r.0.0 model provided by Ebru Bozdağ & Caio Ciardelli.

Revision History

revision r.0.0: uploaded October 29, 2020.

Timeline

2022-05-23
online

Categories

06:13:27 v.d6084d45