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.
|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 (%)|
|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)).|
|Institut fuer Geophysik|
|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
|Depth Coverage||50 to 2850 km|
|Area||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.|
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. https://doi.org/10.1093/gji/ggx405.
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:
- 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.
Model provide by Stephanie Durand
- Model file update by Stéphanie Durand