Data Services Products: EMC-SEISGLOB2 Model based on the joint inversion of normal modes, surface waves and body waves

Summary

Model based on the joint inversion of splitting and cross-coupling coefficients of normal modes, Rayleigh phase velocity perturbations, S SS and ScS body wave delay times. It is corrected from the effect of the crust using model CRUST2.0.

Description

Name SEISGLOB2
Title Model based on the joint inversion of normal modes, surface waves and body waves.
Type 3-D Tomography Earth Model
Sub Type Shear-wave velocity (%)
Year 2017
Short Description   SEISGLOB2 is a global shear velocity tomographic model based on the joint inversion of S SS and ScS delay times, Rayleigh surface wave phase velocity perturbations and splitting and coupling coefficients of normal modes. It is parameterized laterally in spherical harmonics up to degree 40 and with 21 splines in depth (the same as in S40RTS (Ritsema et al. (2011))). The model values are in percent with respect to the reference model PREM (Dziewonski & Anderson (1981)).
Authors:  
Stephanie Durand
Institut fuer Geophysik
Muenster, Germany

Eric Debayle
LGL-TPE, CNRS
Villeurbanne, France

Yanick Ricard
LGL-TPE, CNRS
Villeurbanne, France

Christophe Zaroli
EOST
Strasbourg, France

Sophie Lambotte
EOST
Strasbourg, France
Previous Model SEISGLOB1
Reference Model PREM
 
Model Download SEISGLOB2_percent.nc (see metadata ), is the netCDF file for the model
Model expressed with respect to the reference model PREM.
Please also see the model home page below for a package available to use with this model
 
Model Homepage http://perso.ens-lyon.fr/stephanie.durand/Stephanie_Durand/Welcome.html
Depth Coverage 50 to 2850 km
Areal Coverage Global coverage (latitude: -89°/89°, longitude: 0°/359°)
 
Data Set Description The data set includes ~22M Rayleigh surface wave measurements for fundamental-mode and higher-mode up to 5th order phase velocities, ~110K body wave travel times, ~10K normal mode splitting coefficients and ~650 normal mode cross-coupling coefficients. See Durand et al. (2017) for more details.

SEISGLOB2 shear velocity perturbations
Figure, SEISGLOB2 shear velocity perturbations (%) with respect to PREM at multiple depths.
Green lines display the plate boundaries and the black circles the hotspots location.

Citations and DOIs

To cite the original work behind this Earth model:

  • Durand S., E. Debayle, Y. Ricard, C. Zaroli, S. Lambotte (2017), Confirmation of a change in the global shear velocity pattern at around 1,000 km depth, Geophys. J. Int., 211(3), 1628-1639

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:

References

  • Durand S., E. Debayle, Y. Ricard, C. Zaroli, S. Lambotte (2017), Confirmation of a change in the global shear velocity pattern at around 1,000 km depth, Geophys. J. Int., 211(3), 1628-1639
  • Ritsema, J., Deuss, A., van Heijst, H.J., Woodhouse, J.H., 2011, S40RTS: a degree-40 shear-velocity model for the mantle from new Rayleigh wave dispersion, teleseismic traveltime and normal-mode splitting function measurements, Geophys. J. Int., 184, 1,223-1,236.
  • Dziewonski, A. M., Anderson, D. l., 1981, Preliminary reference Earth model, Phys. Earth Planet. Sci., 25, 297-236.

Credits

Model provide by Stephanie Durand

Timeline

2019-10-15
Model file update by Stéphanie Durand

Categories

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