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Articles | Volume 10, issue 6
Articles | Volume 10, issue 6
https://doi.org/10.5194/se-10-2167-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/se-10-2167-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 10, issue 6
Research article
 | 
20 Dec 2019
Research article |  | 20 Dec 2019

The impact of rheological uncertainty on dynamic topography predictions

Ömer F. Bodur and Patrice F. Rey

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Cited articles

Becker, T. W.: Superweak asthenosphere in light of upper mantle seismic anisotropy, Geochem. Geophy. Geosy., 18, 1986–2003, https://doi.org/10.1002/2017GC006886, 2017. 
Braun, J.: The many surface expressions of mantle dynamics, Nat. Geosci., 3, 825–833, https://doi.org/10.1038/ngeo1020, 2010. 
Cammarano, F., Goes, S., Vacher, P., and Giardini, D.: Inferring upper-mantle temperatures from seismic velocities, Phys. Earth Planet. In., 138, 197–222, https://doi.org/10.1016/S0031-9201(03)00156-0, 2003. 
Cazenave, A., Souriau, A., and Dominh, K.: Global coupling of Earth surface topography with hotspots, geoid and mantle heterogeneities, Nature, 340, 54–57, https://doi.org/10.1038/340054a0, 1989. 
Chopra, P. N. and Paterson, M. S.: The role of water in the deformation of dunite, J. Geophys. Res., 89, 7861–7876, 1984. 
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Convection in the deep Earth dynamically changes the elevation of plates. Amplitudes of those vertical motions predicted from numerical models are significantly higher than observations. We find that at small wavelengths (< 1000 km) this misfit can be due to the oversimplification in viscosity of rocks. By a suite of numerical experiments, we show that considering the non–Newtonian rheology of the mantle results in predictions in amplitude of dynamic topography consistent with observations.
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Understanding the unknowns: the impact of uncertainty in the...