SGLOBE-rani Chang et al. (2015) is a global radially anisotropic shear wave speed model with radial anisotropy allowed in the whole mantle.
|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)|
|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.
|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|
|The above model expressed as Voigt isotropy with respect to the reference model PREM:
SGLOBE-rani-voigt_percent.nc (metadata ), is the netCDF file for the model
The above model expressed as radial anisotropy in percentage with respect to the reference model PREM:
SGLOBE-rani-xi_percent.nc (metadata ), is the netCDF file for the model
The above model expressed as radial anisotropy in (SH/SV)^2 dimensionless scale:
SGLOBE-rani-true-xi.nc (metadata ), is the netCDF file for the model
|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.|
To cite the original work behind 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 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:
- 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, https://doi.org/10.1029/2007JB005169.
Model provided by Sung-Joon Chang