Search Results - "Jault, D"

Tangential stress at the core–mantle interface by Jault, D

“…SUMMARY Fluctuations in the rotation rate of the solid Earth over periods from 5 to 100 yr result from exchanges of angular momentum between the fluid outer…”
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Fast Quasi‐Geostrophic Magneto‐Coriolis Modes in the Earth's Core by Gerick, F., Jault, D., Noir, J.

“…Fast changes of Earth's magnetic field could be explained by inviscid and diffusion‐less quasi‐geostrophic (QG) Magneto‐Coriolis modes. We present a hybrid QG…”
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A Dynamical Prospective on Interannual Geomagnetic Field Changes by Gillet, N., Gerick, F., Angappan, R., Jault, D.

“…Geomagnetic observations from satellites have highlighted interannual variations in the rate of change of the magnetic field originating from Earth’s core…”
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Quasi-geostrophic flows responsible for the secular variation of the Earth's magnetic field by Pais, M. A., Jault, D.

“…We present core flows constructed from high resolution secular variation (SV) models for the epochs 2001, 2002.5 and 2004, assuming that these flows are…”
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Pressure torque of torsional Alfvén modes acting on an ellipsoidal mantle by Gerick, F, Jault, D, Noir, J, Vidal, J

“…SUMMARY We investigate the pressure torque between the fluid core and the solid mantle arising from magnetohydrodynamic modes in a rapidly rotating planetary…”
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Local estimation of quasi-geostrophic flows in Earth’s core by Schwaiger, T, Jault, D, Gillet, N, Schaeffer, N, Mandea, M

“…SUMMARY The inference of fluid motion below the core–mantle boundary from geomagnetic observations presents a highly non-unique inverse problem. We propose a…”
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Radial shear in the flow at the Earth’s core surface by Firsov, I, Jault, D, Gillet, N, Aubert, J, Mandea, M

“…SUMMARY The Earth’s magnetic field at the core–mantle boundary is the gradient of a harmonic potential function if the mantle is electrically insulating, and…”
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Planetary gyre, time-dependent eddies, torsional waves, and equatorial jets at the Earth's core surface by Gillet, N., Jault, D., Finlay, C. C.

“…We report a calculation of time‐dependent quasi‐geostrophic core flows for 1940–2010. Inverting recursively for an ensemble of solutions, we evaluate the main…”
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Correction to: A Dynamical Prospective on Interannual Geomagnetic Field Changes by Gillet, N., Gerick, F., Angappan, R., Jault, D.

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Stochastic modelling of regional archaeomagnetic series by Hellio, G., Gillet, N., Bouligand, C., Jault, D.

“…SUMMARY We report a new method to infer continuous time series of the declination, inclination and intensity of the magnetic field from archeomagnetic data…”
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On magnetostrophic inertia-less waves in quasi-geostrophic models of planetary cores by Labbé, F., Jault, D., Gillet, N.

“…We investigate quasi-geostrophic waves in a rotating spherical shell permeated by an imposed magnetic field . A projection of the momentum equation onto a well…”
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Zonal shear and super-rotation in a magnetized spherical Couette-flow experiment by Brito, D, Alboussière, T, Cardin, P, Gagnière, N, Jault, D, La Rizza, P, Masson, J-P, Nataf, H-C, Schmitt, D

“…We present measurements performed in a spherical shell filled with liquid sodium, where a 74-mm-radius inner sphere is rotated while a 210-mm-radius outer…”
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Experimental evidence of non-linear resonance effects between retrograde precession and the tilt-over mode within a spheroid by Noir, J., Cardin, P., Jault, D., Masson, J.-P.

“…The Poincaré flow (also known as the tilt-over mode) in a precessing cavity filled with water is investigated experimentally. Assuming that the flow is mainly…”
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Numerical study of a rotating fluid in a spheroidal container by Schmitt, D., Jault, D.

“…The motion of an incompressible, viscous rotating fluid contained in a spheroidal container is studied by a direct numerical simulation in an oblate spheroidal…”
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Turbulent geodynamo simulations: a leap towards Earth’s core by Schaeffer, N., Jault, D., Nataf, H.-C., Fournier, A.

“…Summary We present an attempt to reach realistic turbulent regime in direct numerical simulations of the geodynamo. We rely on a sequence of three…”
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Experimental study of super-rotation in a magnetostrophic spherical Couette flow by Nataf, H.-C., Alboussière, T., Brito, D., Cardin, P., Gagnière, N., Jault, D., Masson, J.-P., Schmitt, D.

“…We report measurements of electric potentials at the surface of a spherical container of liquid sodium in which a magnetized inner core is differentially…”
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Excitation of travelling torsional normal modes in an Earth’s core model by Gillet, N., Jault, D., Canet, E.

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Westward drift, core motions and exchanges of angular momentum between core and mantle by Jault, D, Gire, C, Le Mouel, J. L

“…The westward drift is one of the most well known features of the geomagnetic field. An examination of the apparent drift of the main field as seen at the…”
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Wave-like motions and torques in Earth's core as inferred from geomagnetic data: A synthetic study by Schwaiger, T., Gillet, N., Jault, D., Istas, M., Mandea, M.

“…Here, we present a synthetic validation for the inversion of transient fluid motions at the surface of Earth’s core. It is based on a numerical simulation of…”
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Constraining electromagnetic core–mantle coupling by Wicht, J., Jault, D.

“…Electromagnetic core–mantle coupling is one candidate for explaining length of day (LOD) variations on decadal time scales. This coupling has traditionally…”
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