Data Services Products: EMC-SPani 3D joint anisotropic compressional and shear wave velocity model of the whole mantle

Summary

SPani (Tesoniero et al., 2015) is a joint model of radially anisotropic P- and S-velocity variation of the whole mantle based on the inversion of fundamental Rayleigh and Love surface waves up to the sixth overtone and major P- and S-body wave phases.

Description

Name SPani
Title A global joint model of radially anisotropic P- and S-wave velocity heterogeneity
Type 3-D Tomography Earth Model
Sub Type Compressional and Shear velocity variations with respect to PREM, absolute compressional and shear wave speed (km/s), radial compressional and shear wave anisotropy.
Year 2015
Short Description   The model is based on a ray-theoretical JWKB approximation, and account for the non-linear effects of lateral variation on the crust as in Boschi & Ekström, 2002 and references therein. We invert possibly the largest dataset of seismic phases. The model is parameterized in voxels and layers (5×5 degrees cells and 28 vertical layers). Model parameters are dlnvph, dlnvpv, dlnvsh, dlnvsv.The inversion scheme incorporates an extra regularization term in the form of isotropic S/P velocity variation.
Authors:  
Andrea Tesoniero
Department of Geosciences and Natural Resource Management
University of Copenhagen
Copenhagen, Denmark
Ludwig Auer
Institut für Geophysik, Eidgenössisch Technische Hochschule
Zürich, Switzerland
Lapo Boschi
Sorbonne Universités, UPMC Univ Paris 06
Institut des Sciences de la Terre Paris (iSTeP)
Paris, France
Fabio Cammarano
Department of Geosciences and Natural Resource Management
University of Copenhagen
Copenhagen, Denmark
Previous Model
Reference Model PREM
Model Download
The above model expressed as compressional and shear velocity variations with respect to the reference model, absolute shear and compressional velocity in km/s and radial Vp (φ) and Vs (ξ) anisotropic parameters:
spani.nc (see metadata ), is the netCDF file for the model
Original Model Repository https://github.com/atesoniero/SPani
Depth Coverage From 50km to 2891km.
Areal Coverage Global
 
Data Set Description [Ekström, 2011, Visser et al., 2008] for fundamental and high overtones respectively, and [Antolik et al., 2003, Ritsema and van Heijst, 2002, Ritsema et al., 2011] for direct P body wave phases, multiple bouncing P phases and and major S body wave phases respectively
 
Supplemental Information The supplemental information page contains reference tables with the seismic dataset and results of several resolution tests.
 

Isotropic VP relative variations
Figure 1: Isotropic VP relative variations at different depths for our preferred model SPani.

Isotropic VS relative variation
Figure 2: Isotropic VS relative variation at di different depths for our preferred model SPani.

Citations and DOIs

To cite the original work behind this Earth model:

  • Tesoniero, A., L. Auer, L. Boschi, and F. Cammarano (2015), Hydration of marginal basins and compositional variations within the continental lithospheric mantle inferred from a new global model of shear and compressional velocity, J. Geophys. Res. Solid Earth, 120, https://doi.org/10.1002/2015JB012026.

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

  • Auer, L., L. Boschi, T. W. Becker, T. Nissen-Meyer, and D. Giardini (2014), Savani: A variable resolution whole-mantle model of anisotropic shear velocity variations based on multiple data sets, J. Geophys. Res. Solid Earth, 119, 3006–3034, https://doi.org/10.1002/2013JB010773.
  • Antolik, M., Gu, Y. J., Ekström, G., and Dziewonski, A. M. (2003). J362D28: a new joint model of compressional and shear velocity in the Earth’s mantle. Geophysical Journal International, 153(2):443-466.
  • Boschi, L., and G. Ekström, New images of the Earth’s upper mantle from measurements of surface wave phase velocity anomalies, J. Geophys. Res., 107(B4), https://doi.org/10.1029/2000JB000059, 2002.
  • Ekström, G. (2011). A global model of Love and Rayleigh surface wave dispersion and anisotropy, 25-250 s. Geophysical Journal International, 187(3):1668-1686.
  • Ritsema, J., Deuss, A., van Heijst, J., and J.H., W. (2011). S40RTS: a degree-40 shear-velocity model for the mantle from new Rayleigh wave dispersion, tele-
    seismic traveltime and normal-mode splitting function measurements. Geophysical Journal International, 184(3):1223-1236.
  • Ritsema, J. and van Heijst, H. J. (2002). Constraints on the correlation of P- and S-wave velocity heterogeneity in the mantle from P, PP, PPP and PKPab traveltimes. Geophysical Journal International, 149(2):482-489.
  • Tesoniero, A., Auer, L., Boschi, L., and Cammarano, F. (2015). Hydration of marginal basins and compositional variations within the continental lithospheric mantle inferred from a new global model of shear and compressional velocity. Journal of Geophysical Research: Solid Earth.
  • Visser, K., Trampert, J., and Kennett, B. L. N. (2008). Global anisotropic phase velocity maps for higher mode Love and Rayleigh waves. Geophysical Journal International, 172(3):1016-1032.

Credits

Model provided by Andrea Tesoniero

Timeline

2015-11-09
online

Categories

Page built 03:41:26 | v.872ceefb