Data Services Products: EMC-SGLOBE-rani 3D global shear-wave isotropic and radially anisotropic model from a joint inversion for multiple data sets

Summary

SGLOBE-rani Chang et al. (2015) is a global radially anisotropic shear wave speed model with radial anisotropy allowed in the whole mantle.

Description

Name SGLOBE-rani
Title 3D global shear-wave isotropic and radially anisotropic model from a joint inversion for multiple data sets
Type 3-D Tomography Earth Model
Sub Type Shear-wave velocity (%) and radial anisotropy (% and (SH/SV)^2)
Year 2015
Short Description   SGLOBE-rani is a global radially anisotropic shear wave speed model with radial anisotropy allowed in the whole mantle. It is based on a seismic data set of over 43M seismic surface wave (fundamental and overtones) and body wave measurements. It models simultaneously crustal thickness and mantle structure, and its reference model is PREM. NOTE: Kustowski et al., 2008 and Chang et al., 2014 showed that the anisotropic structure in the lowermost mantle retrieved from global tomographic inversions can be strongly affected by leakage effects, so we discourage interpreting SGLOBE-rani’s anisotropic structure below ~1500 km depth.
Authors:  
Sung-Joon Chang
Division of Geology and Geophysics
Kangwon National University
Chuncheon, Gangwon-do 24341, South Korea
Ana M.G. Ferreira
Department of Earth Sciences
University College London
London, WC1E 6BT, UK
Previous Model None
Reference Model PREM
Model Download
netCDF binary files for the above model expressed as Voigt isotropy, SGLOBE-rani-voigt_percent.nc (metadata )and radial anisotropy in percentage, SGLOBE-rani-xi_percent.nc (metadata )with respect to the reference model PREM and radial anisotropy in (SH/SV)^2 dimensionless scale, SGLOBE-rani-true-xi_percent.nc (metadata ), respectively.
Depth Coverage From 25km to 2800km.
Areal Coverage Global coverage (latitude: -88°/88°, longitude: 0°/358°)
 
Data Set Description [Chang et al. (2015)] The data set includes ~43M surface wave measurements for fundamental-mode and higher-mode up to 6th order phase velocities and fundamental-mode group velocities and ~420K body wave travel times.
 
Supplemental Information The supplemental information page for this model contains information on model resolution.
 

 Shear-wave Voigt isotropy and radial anisotropy perturbations
Figure, Chang et al. (2015), Shear-wave Voigt isotropy and radial anisotropy perturbations (%) with respect to PREM at multiple depths. Depths and the corresponding ranges of model amplitude variations are shown at the left-hand side of each depth slice for Voigt isotropy and at the right-hand side of each depth slice for radial anisotropy, respectively.

Absolute values of radial anisotropy
Figure, Chang et al. (2015), Absolute values of radial anisotropy, (SH/SV)^2, at multiple depths. Depths and the corresponding ranges of model amplitude variations are shown at the left- and right-hand side of each depth slice.

References

  • Chang, S.-J., A.M.G. Ferreira, J. Ritsema, H.J. van Heijst, and J.H. Woodhouse (2014), Global Radially anisotropic mantle structure from multiple datasets: A review, current challenges, and outlook, Tectonophysics, 617, 1-19.
  • Kustowski, B., G. Ekström, and A.M. Dziewoński (2008), Anisotropic shear-wave velocity structure of the Earth’s mantle: A global model, J. Geophys. Res., 113, B06306, doi:10.1029/2007JB005169.

Citations and DOIs

To cite the source of this Earth model:

  • Chang, S.-J., A.M.G. Ferreira, J. Ritsema, H.J. van Heijst, and J.H. Woodhouse (2015), Joint inversion for global isotropic and radially anisotropic mantle structure including crustal thickness perturbations, J. Geophys. Res., 120, 4278-4300, https://doi.org/10.1002/2014JB011824.

To reference the use of this Earth model hosted by EMC:

  • IRIS DMC (2017), Data Services Products: SGLOBE-rani, 3D global shear-wave isotropic and radially anisotropic model from a joint inversion for multiple data sets, https://doi.org/10.17611/DP/EMCSGLOBERANI.

To cite IRIS Earth Model Collaboration (EMC) data product or reference use of its repository:

Credits

  • Sung-Joon Chang and Ana M.G. Ferreira

Timeline

2017-07-18
online

Categories

Page built 18:30:47 | v.079c300e