Bernhard S. A. Schuberth
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View article: Tomopac2: an unfolded-slab plate reconstruction validated via mantle circulation models in a closed-loop experiment
Tomopac2: an unfolded-slab plate reconstruction validated via mantle circulation models in a closed-loop experiment Open
Mantle slabs imaged by seismic tomography provide complementary subsurface information that could improve global plate reconstructions because they are indications of ancient tectonic plates. Linking mantle slabs to the surface plates requ…
View article: From seismic models to mantle temperatures: Uncertainties related to mineralogical complexities and limited tomographic resolution
From seismic models to mantle temperatures: Uncertainties related to mineralogical complexities and limited tomographic resolution Open
SUMMARY Many geophysical studies require knowledge on the present-day temperature distribution in Earth’s mantle. One example is geodynamic inverse models, which utilize data assimilation techniques to reconstruct mantle flow back in time.…
View article: A tomographic testbed for geodynamic reconstructions of past mantle flow
A tomographic testbed for geodynamic reconstructions of past mantle flow Open
Reconstructions of past mantle flow provide a powerful framework to sharpen our understanding of the dynamics and structure of the deep Earth. As a data-driven approach to geodynamic modelling, these reconstructions explicitly require an e…
View article: Dynamic and seismic expressions of mineral phase transitions in mantle circulation models computed with TerraNeo
Dynamic and seismic expressions of mineral phase transitions in mantle circulation models computed with TerraNeo Open
One major objective in geodynamics is to create models of mantle flow that provide quantitative information to other Earth science disciplines. In this respect, geologically informed fluid dynamics simulations, such as mantle circulation m…
View article: Investigating deep mantle evolution by linking geodynamic modelling to seismic data
Investigating deep mantle evolution by linking geodynamic modelling to seismic data Open
The alternation between superchrons and periods of rapid field reversals is comparableto timescales of mantle convection, suggesting that lowermost mantle evolution impactsthe reversal frequency of the Earth’s magnetic field. By cont…
View article: From seismic models to mantle temperatures: Uncertainties and implications for geodynamic simulations
From seismic models to mantle temperatures: Uncertainties and implications for geodynamic simulations Open
Many geophysical studies require knowledge on the present-day temperature distribution in Earth's mantle. One example are geodynamic inverse models, which utilize data assimilation techniques to reconstruct mantle flow back in time. The th…
View article: Tomotectonic reconstructions validated via mantle circulation models in a closed-loop experiment
Tomotectonic reconstructions validated via mantle circulation models in a closed-loop experiment Open
Mantle slabs imaged by seismic tomography provide complementary subsurface information that could improve global plate reconstructions because they are indications of ancient tectonic plates. Linking mantle slabs to the surface plates requ…
View article: A concept for the global assessment of tomographic resolution and uncertainty
A concept for the global assessment of tomographic resolution and uncertainty Open
SUMMARY A major challenge in seismic tomography consists in quantifying and representing model resolution and uncertainty, particularly at global scales. This information is crucial for interpretations of tomographic images and their techn…
View article: Closed loop experiments in global geodynamic earth models
Closed loop experiments in global geodynamic earth models Open
Recent advances in computational capabilities make it possible to compute global geodynamic earth models at near earthlike convective vigor. This paves the way to systematically obtain a range of synthetic data from such models in an appro…
View article: Deriving mantle temperatures from global seismic models: A quantitative analysis in the light of uncertain mineralogy and limited tomographic resolution
Deriving mantle temperatures from global seismic models: A quantitative analysis in the light of uncertain mineralogy and limited tomographic resolution Open
Mantle convection is driven by buoyancy forces in Earth’s interior. The resulting radial stresses generate vertical deflections of the surface, leaving traces in the geological record. Utilizing new data assimilation techniques, geod…
View article: Global assessment of tomographic resolution and uncertainty with the SOLA method
Global assessment of tomographic resolution and uncertainty with the SOLA method Open
Interpretations of seismic tomography and applications of the resulting tomographic images, e.g. for estimating present-day mantle temperatures, require information on their resolution and uncertainty. Assessing these model properties is o…
View article: Exploring the potential of normal mode seismology for the assessment of geodynamic hypotheses
Exploring the potential of normal mode seismology for the assessment of geodynamic hypotheses Open
Fluid dynamics simulations are a powerful tool for understanding processes in the Earth's deep interior. Mantle circulation models (MCMs), for example, provide important insight into the present-day structure of the mantle and its thermody…
View article: Geodynamic-mineralogical predictions of mantle transition zone seismic structure
Geodynamic-mineralogical predictions of mantle transition zone seismic structure Open
A main objective in geodynamics is to create models that provide quantitative information to other Earth science disciplines. In order to assess the validity of the underlying assumptions and chosen input parameters related to different ge…
View article: Robust global mantle flow trajectories and their validation via dynamic topography histories
Robust global mantle flow trajectories and their validation via dynamic topography histories Open
SUMMARY The ability to construct time-trajectories of mantle flow is crucial to move from studies of instantaneous to time-dependent earth models and to exploit geological constraints for mantle convection modelling. However mantle convect…
View article: Linking thermal and seismic mantle structure in the light of uncertain mineralogy and limited tomographic resolution
Linking thermal and seismic mantle structure in the light of uncertain mineralogy and limited tomographic resolution Open
Mantle convection is primarily driven by gravitational forces acting on thermally buoyant structures in Earth's interior. The associated vertical stresses generate phases of uplift and subsidence of the surface, leaving observable traces i…
View article: Using Earth’s free oscillations to assess mantle circulation models
Using Earth’s free oscillations to assess mantle circulation models Open
For a thorough understanding of the impact of mantle convection on vertical motions of the lithosphere, computational modeling plays a crucial role. Mantle circulation can be modeled by solving the equations of motion of a fluid using Eart…
View article: Geodynamic-mineralogical predictions of mantle transition zone seismic structure
Geodynamic-mineralogical predictions of mantle transition zone seismic structure Open
The mantle transition zone (TZ) is expected to influence vertical mass flow between upper and lower mantle as it hosts a complex set of mineral phase transitions and an increase in viscosity with depth. Still, neither its seismic structure…
View article: Ray-theoretical and finite-frequency seismic traveltime predictions for tomographic filtering of 3D mantle circulation models
Ray-theoretical and finite-frequency seismic traveltime predictions for tomographic filtering of 3D mantle circulation models Open
Linking geodynamic models to observations from seismology is essential for improving our understanding of the present-day thermodynamic state of the mantle. From the geodynamic perspective, 3D mantle circulation models (MCMs) yield physica…
View article: Mantle Flow Trajectories in the Presence of Poorly Constrained Initial Conditions: Analysis of an Ensemble of Models
Mantle Flow Trajectories in the Presence of Poorly Constrained Initial Conditions: Analysis of an Ensemble of Models Open
<p>A crucial goal in geodynamics is the development of time-dependent earth models so that poorly known mantle convection parameters can be tested against observables gleaned from the geologic record. To this end one must construct m…
View article: Geodynamic predictions of seismic structure and discontinuity topography of the mantle transition zone
Geodynamic predictions of seismic structure and discontinuity topography of the mantle transition zone Open
<p>The mantle transition zone (TZ) is expected to influence convective flow, but neither its structural characteristics nor dynamic effects have been conclusively constrained. Lateral temperature variations modulate the topography of…
View article: The relevance of full 3D-wavefield simulations for the tomographic filtering of geodynamic models
The relevance of full 3D-wavefield simulations for the tomographic filtering of geodynamic models Open
<p>Tomographic-geodynamic model comparisons are a key component in studies of the present-day thermodynamic state of the mantle. A fundamental prerequisite for quantitatively meaningful comparisons is &#8220;tomographic filtering…
View article: Proxies for the presence of post-perovskite in the lowermost mantle based on seismic tomography and geodynamic modelling&#160;
Proxies for the presence of post-perovskite in the lowermost mantle based on seismic tomography and geodynamic modelling  Open
<p>The post-perovskite (pPv) phase is often invoked as an explanation for seismic observations of discontinuities, anisotropy and anti-correlation between velocities in the lower mantle. Accurate interpretations of these features in …
View article: Earth's free-oscillation spectrum as a tool to assess mantle circulation models
Earth's free-oscillation spectrum as a tool to assess mantle circulation models Open
<p>Geodynamic inverse models that aim at retrodicting past mantle evolution require accurate estimates of its thermodynamic present-day state. Tomographic models are in principle well suited to provide this information. However, a fu…
View article: Where Are the Proto‐South China Sea Slabs? SE Asian Plate Tectonics and Mantle Flow History From Global Mantle Convection Modeling
Where Are the Proto‐South China Sea Slabs? SE Asian Plate Tectonics and Mantle Flow History From Global Mantle Convection Modeling Open
The plate tectonic history of the hypothesized “proto‐South China Sea” (PSCS) ocean basin and surrounding SE Asia since Cenozoic times is controversial. We implement four diverse proto‐South China Sea plate reconstructions into global geod…
View article: Where are the proto-South China Sea slabs? SE Asian plate tectonics and mantle flow history from global mantle convection modeling-Supplementary data
Where are the proto-South China Sea slabs? SE Asian plate tectonics and mantle flow history from global mantle convection modeling-Supplementary data Open
Present-day mantle thermal structure for Models 1a, 1b, 2a, and 2b predicted from geodynamic model.
View article: Tomographic filtering via the generalized inverse: a way to account for seismic data uncertainty
Tomographic filtering via the generalized inverse: a way to account for seismic data uncertainty Open
SUMMARY Tomographic-geodynamic model comparisons are a key component in studies of the present-day state and evolution of Earth’s mantle. To account for the limited seismic resolution, ‘tomographic filtering’ of the geodynamically predicte…
View article: Visualising large-scale geodynamic simulations: How to Dive into Earth's Mantle with Virtual Reality
Visualising large-scale geodynamic simulations: How to Dive into Earth's Mantle with Virtual Reality Open
<p>Precise knowledge of the forces acting at the base of tectonic plates is of fundamental importance, but models of mantle dynamics are still often qualitative in nature to date. One particular problem is that we cannot access the d…
View article: Tomographic filtering of mantle circulation models via the generalised inverse: A way to account for seismic data uncertainty
Tomographic filtering of mantle circulation models via the generalised inverse: A way to account for seismic data uncertainty Open
<p>For a comprehensive link between seismic tomography and geodynamic models, uncertainties in the seismic model space play a non-negligible role. More specifically, knowledge of the tomographic uncertainties is important for obtaini…
View article: Resolution and Covariance of the LLNL-G3D-JPS Global Seismic Tomography Model: Applications to Travel time Uncertainty and Tomographic Filtering of Geodynamic Models
Resolution and Covariance of the LLNL-G3D-JPS Global Seismic Tomography Model: Applications to Travel time Uncertainty and Tomographic Filtering of Geodynamic Models Open
SUMMARY Resolution and covariance of global seismic tomography models are most often unknown quantities. However, there are many potential applications of these matrices in the broad solid Earth research community as well as more focused s…