Data Services Products: EMC-SPacific-rani 3-D shear-wave isotropic and radially anisotropic shear wave speed model of the Pacific upper mantle from 3-D anisotropic waveform modelling

Summary

SPacific-rani is a radially anisotropic shear wave speed model in the Pacific upper mantle. We assess radially anisotropic features in SGLOBE-rani (Chang et al., 2015) in the Pacific with full waveform modelling of fundamental mode surface waves along with independent data. We obtain constraints on the radially anisotropic structure of the Pacific upper mantle by a subsequent inversion.

Description

Name SPacific-rani
Title 3-D shear-wave isotropic and radially anisotropic shear wave speed model of the Pacific upper mantle from 3-D anisotropic waveform modelling
Type 3-D Tomography Earth Model
Sub Type Shear-wave velocity (%) and Radial anisotropy (% and (SH/SV)2)
Year 2021
Data Revision r0.0 & r0.1 (revision history)
 
Short Description   SPacific-rani is a radially anisotropic shear wave speed model in the Pacific upper mantle. We assess radially anisotropic features in SGLOBE-rani (Chang et al., 2015) in the Pacific with full waveform modelling of fundamental mode surface waves along with independent data. We obtain constraints on the radially anisotropic structure of the Pacific upper mantle by a subsequent inversion.
 
Authors: Elodie Kendall, Geodynamic Modelling, GFZ Potsdam, 14473 Potsdam, Germany
Ana M.G. Ferreira, Department of Earth Sciences, University College London, London, WC1E 6BT, UK
Sung-Joon Chang, Division of Geology and Geophysics, Kangwon National University, Chuncheon, Gangwon-do 24341, South Korea
Michael Witek, Division of Geology and Geophysics, Kangwon National University, Chuncheon, Gangwon-do 24341, South Korea
Daniel Peter, Extreme Computing Research Center, King Abdullah University of Science and Technology (KAUST)
 
Previous Model SGLOBE-rani
 
Reference Model PREM
 
Model Download The above model expressed as Voigt isotropy with respect to the reference model PREM: SPacific-rani-voigt.r0.1.nc (see metadata) in netCDF 3 Classic format.

The above model expressed as radial anisotropy in percentage with respect to the reference model PREM: SPacific-rani-xi.r0.0.nc (see metadata) in netCDF 3 Classic format.

The above model expressed as radial anisotropy in (SH/SV)2 dimensionless scale: SPacific-rani-true-xi.r0.0.nc (see metadata) in netCDF 3 Classic format.
 
Depth Coverage From 0km to 410km
 
Area Regional coverage (latitude: -90°/2/90°, longitude: 90°/2/314°)
 
Data Set Description [Kendall et al. (2021) ] The data set includes ~2,300 surface waveform comparisons of fundamental-mode phase velocities in synthetic seismograms computed with the spectral element method, SPECFEM3D-GLOBE and real data.
 
 

radial anisotropy
Fig. 1- a) Shear-wave Voigt isotropy and b) radial anisotropy perturbations (%) with respect to PREM at various depths. The corresponding ranges of model amplitude variations are shown at the bottom of each depth slice. c) Absolute values of radial anisotropy, (SH/SV)2, at multiple depths.

60km
Fig. 2 -Recovery of 5% sinusoidal lateral variations in Vs (top row), Xi (middle row) and both Vs and Xi (bottom row) sized 20 degrees at 60km (top row) in the Pacific.
100km
Fig. 3 -Recovery of 5% sinusoidal lateral variations in Vs (top row), Xi (middle row) and both Vs and Xi (bottom row) sized 20 degrees at 100km (top row) in the Pacific.
150km
Fig. 4 -Recovery of 5% sinusoidal lateral variations in Vs (top row), Xi (middle row) and both Vs and Xi (bottom row) sized 20 degrees at 150km (top row) in the Pacific.

Citations and DOIs

To cite the original work behind this Earth model:

  • Kendall, E., A.M.G. Ferreira, S.-J. Chang, M. Witek, D. Peter (2021), Constraints on the upper mantle structure beneath the Pacific from 3-D anisotropic waveform modelling, J. Geophys. Res.https://doi.org/10.1029/2020JB020003.

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.2021.spacific.rani.1

References:

  • 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/0.1002/2014JB011824.

Credits

  • r0.1 model provided by Elodie Kendall.
  • r0.0 model provided by Elodie Kendall.

Revision History

revision r0.1 for SPacific-rani-voigt only: Averaged velocities at the 220km and 400km discontinuities, uploaded April 14, 2021.
revision r0.0: uploaded March 30, 2021.

Timeline

2021-03-30
online

Categories

05:52:21 v.d6084d45