A comparison of tomographic and geodynamic mantle models

By Thorsten W. Becker, Lapo Boschi. 2002

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View Paper: https://www.semanticscholar.org/paper/78e7c1cfe1d0b13c76ba3bcb4354a5cb0888f7ac

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In Geophysics

Citations in the corpus

Whole-mantle radially anisotropic shear velocity structure from spectral-element waveform tomography (2014, background): “At the same time, shorter wavelength features (<2500 km) do not tend to correlate well across global models (Becker & Boschi 2002; Dziewonski 2005), as C© The Authors 2014.”
The influence of MORB and harzburgite composition on thermo-chemical mantle convection in a 3-D spherical shell with self-consistently calculated mineral physics (2010, methodology): “, 1994) for the global averaged tomographic model SMEAN (Becker and Boschi, 2002) and those calculated from the convection models (Fig.”
Dynamics and evolution of the deep mantle resulting from thermal, chemical, phase and melting effects (2012, background): “, 1997; Grand, 2002; Zhao, 2009) and that seismically fast regions above the CMB correlate well with historical subduction zones (Richards and Engebretson, 1992; Ricard et al., 1993; Kyvalova et al., 1995; Van der Voo et al., 1999a,b; Becker and Boschi, 2002; van der Meer et al., 2010).”
Seismic imaging: From classical to adjoint tomography (2012, background): “The advent of highresolution tomography and renewed focus on resolution improvements (Becker and Boschi, 2002; Ekström and Dziewonski, 1998; Gu et al., 2001, 2003; Houser et al., 2008; Mégnin and Romanowicz, 2000) tipped the perception scale clearly in favor of a partially layered convection system.”
S40RTS: A degree-40 shear-velocity model for the mantle from new Rayleigh wave dispersion, teleseismic traveltime and normal-mode splitting function measurements (2011, background): “We have previously associated these high-velocity anomalies with the Central Atlantic Minimum, a thermal anomaly proposed by Bonatti (1996) and with small-scale convection due to contrasting thickness of the continental and oceanic lithosphere (King & Ritsema 2000; Ritsema et al. 2004).”
Models of large‐scale viscous flow in the Earth's mantle with constraints from mineral physics and surface observations (2006, methodology): “In most cases, and unless mentioned otherwise, we use tomography model smean (Becker & Boschi 2002) for seismic velocity variations.”
Radial seismic anisotropy as a constraint for upper mantle rheology (2007, background): “The mean correlation up to degree L=8 is 〈r8(δvs)〉 ≳ 0.8, both when compared among radially anisotropic models, and when compared to SMEAN ( Becker and Boschi, 2002 ).”
The dynamics of subduction and trench migration for viscosity stratification (2005, background): “…morphologies and the ponding of subducted material at or above the 660 km transition which are seen in seismic tomography (e.g. Fukao et al. 2001; Becker & Boschi 2002; Kárason 2002) would be explained as a function of the descent of dense material that interacts with a viscosity contrast, with…”
Savani: A variable resolution whole‐mantle model of anisotropic shear velocity variations based on multiple data sets (2014, methodology): “…robustness of global tomographic models has allowed for a number of subsequent studies, aimed at reconciling seismological results with dynamic models of mantle convection [e.g., Mégnin et al., 1997; Becker and Boschi, 2002; Ritsema et al., 2007; Boschi et al., 2008; Bull et al., 2010].”
Predicting plate velocities with mantle circulation models (2001, methodology): “The S wave models have a more even data coverage in the upper mantle since they can rely on surface wave observations which are not limited by the ray path incidence which is nearly vertical at shallow depths [e.g., Becker and Boschi, 2001].”
An anisotropic shear velocity model of the Earth's mantle using normal modes, body waves, surface waves and long-period waveforms (2014, background): “Similarity of large-scale variations is important for demonstrating the robustness of tomographic imaging, and offers the prospect of future agreement on smaller length scales, for which the intermodel correlations remain low (Becker & Boschi 2002).”
Reconciling dynamic and seismic models of Earth's lower mantle: The dominant role of thermal heterogeneity (2012, background): “Different global tomographic models generally agree on the large-scale structure of Earth’s lower mantle, but recover different anomaly amplitudes and relative strengths of shear and compressional velocity heterogeneity (e.g. Becker and Boschi, 2002).”
On the statistical distribution of seismic velocities in Earth's deep mantle (2008, methodology): “Several of the S models have corresponding P models; J362D28 from Antolik et al. (2003), PRI-P05 from Montelli et al. (2004), HMSL - P06 from Houser et al. (2007), and PMEAN from Becker and Boschi (2002).”
Comparison of azimuthal seismic anisotropy from surface waves and finite strain from global mantle-circulation models (2003, background): “…are expanded on 1◦ × 1◦ grids with typical radial spacing of ∼100 km; they are based on flow calculations with maximum spherical harmonic degree max = 63 for plate motions and max = 31 for density fields (tomographic models are typically limited to long wavelengths, cf. Becker & Boschi 2002).”
A geodynamic model of plumes from the margins of Large Low Shear Velocity Provinces (2012, unknown): “” (bottom) For comparison tomography model SMEAN [Becker and Boschi, 2002].”
Global adjoint tomography: first-generation model (2016, background): “Since most global models are in agreement at long wavelengths (e.g. Ritzwoller & Lavely 1995; Becker & Boschi 2002), we chose to start with such a model rather than a spherically symmetric model.”