Conférences et présentations orales
- 2018 -
- [popular science talk] Inversion du champ magnétique terrestre : quand la Terre perd le Nord
Nathanael Schaeffer
Pint of Science,
Grenoble (France)
[ pdf ]
- [invited talk] Geodynamo reversals and numerical simulations
Nathanael Schaeffer
Study of the Earth’s Deep Interior,
Edmonton (Canada)
[ pdf ]
- [poster] Can precession in liquid-metal spherical cores drive planetary magnetic fields ?
Nathanael Schaeffer, David Cebron, Raphael Laguerre, Jerome Noir
Study of the Earth’s Deep Interior,
Edmonton (Canada)
- [poster] Torsional Alfv́en waves in a dipolar magnetic field : experiments and simulations
Zahia Tigrine, Henri-Claude Nataf, Nathanael Schaeffer, Philippe Cardin, Franck Plunian
Study of the Earth’s Deep Interior,
Edmonton (Canada)
- [poster] Linear model of subgrid induction at the core surface in geodynamo simulation : impact for core flow reconstructions
Nicolas Gillet, Julien Aubert, Nathanael Schaeffer
Study of the Earth’s Deep Interior,
Edmonton (Canada)
- 2017 -
- [poster] Exploring planetary core dynamics with the SINGE and XSHELLS codes
N. Schaeffer, J. Vidal
Frontiers in planetary core dynamics,
Autrans (France)
- [talk] Subcritical convection in rapidly rotating liquid metal spheres
Elliot Kaplan, Nathanaël Schaeffer, Philippe Cardin and
Céline Guervilly, Jérémie Vidal
MREP 2017,
Cambridge (U.K.)
[ pdf ]
- [poster] Turbulent Geodynamo simulations
Nathanaël Schaeffer, Dominique Jault, Henri-Claude Nataf, Alexandre Fournier
Fifty years after Roberts’ MHD : Dynamos and planetary flows today,
Royal Astronomical Society, London (U.K.)
[ pdf ]
- [invited talk] Simulations of the Earth’s magnetic field and length-of-day variations
Nathanaël Schaeffer
Séminaire temps-espace,
Observatoire de Paris (France)
[ pdf ]
- [invited talk] Recent results of numerical dynamos in spheres
Nathanaël Schaeffer
GDR Dynamo,
IHP, Paris (France)
[ pdf ]
- 2016 -
- [poster] Exploring planetary core dynamics with the SINGE and XSHELLS codes
N. Schaeffer, J. Vidal, E. Kaplan, D. Cebron
Study of the Earth’s Deep Interior,
Nantes (France)
[ poster ]
- [poster] Core Flows inferred from Geomagnetic Field Models and the Earth’s Dynamo
N. Schaeffer, M.A. Pais, E. Lora Silva
Study of the Earth’s Deep Interior,
Nantes (France)
[ hal ]
- [poster] Dissipation of free torsional eigenmodes and conductivity of the lowermost mantle
D. Jault, N. Schaeffer, N. Gillet
Study of the Earth’s Deep Interior,
Nantes (France)
- [poster] Elliptical instability in stably stratified fluid interiors
J. Vidal, R. Hollerbach, N. Schaeffer, D. Cebron
Study of the Earth’s Deep Interior,
Nantes (France)
- [poster] Global stability analysis of mechanically-driven flows in rigid rotating ellipsoids
J. Vidal, D. Cebron, N. Schaeffer
Study of the Earth’s Deep Interior,
Nantes (France)
- [poster] Flow States in the Derviche Tourneur experiment
E. Kaplan, H-C. Nataf, N. Schaeffer
Study of the Earth’s Deep Interior,
Nantes (France)
- [poster] Frequency spectrum of the geomagnetic field harmonic coefficients from dynamo simulations
C. Bouligand, N. Gillet, D. Jault, N. Schaeffer, A. Fournier, J. Aubert
Study of the Earth’s Deep Interior,
Nantes (France)
- [poster] Instabilities induced by the precession of spherical shell
R. Laguerre, D. Cebron, J. Noir, N. Schaeffer, V. Dehant
Study of the Earth’s Deep Interior,
Nantes (France)
- [poster] Latest news of the DTSOmega experiment
H-C. Nataf, P. Cardin, E. Kaplan, N. Schaeffer, P. La Rizza, A. Richard, J-P. Masson, D. Grand
Study of the Earth’s Deep Interior,
Nantes (France)
- [poster] Force balance and wave motion in Earth’s core
A Fournier, J Aubert, T. Gastine, N. Schaeffer
Study of the Earth’s Deep Interior,
Nantes (France)
- [poster] Diffusionless hydromagnetic modes in rotating ellipsoids : A road to weakly nonlinear models ?
J. Vidal, D. Cebron, N. Schaeffer
19eme Rencontre du non-linéaire,
Paris (France)
[ HAL | arXiv | pdf ]
- [poster] Modal stability analysis of mechanically-driven flows in rigid rotating ellipsoids
J. Vidal, D. Cebron, N. Schaeffer
19eme Rencontre du non-linéaire,
Paris (France)
[ pdf ]
- [poster] Modal stability analysis of mechanically-driven flows in rigid rotating ellipsoids
J. Vidal, D. Cebron, N. Schaeffer
Emil Hopfinger Colloquium,
Grenoble (France)
- [invited talk] Hydromagnetic waves and modes in the Earth’s core, influence of stratification and mantle conductivity
N. Schaeffer, D. Jault, J. Vidal
séminaire à l’observatoire,
Bruxelles (Belgique)
- 2015 -
- [invited talk] Geodynamo Simulations with XSHELLS + SHTns
Nathanael Schaeffer
Geodynamo Benchmarking Workshop,
NCAR, Boulder (USA)
[ pdf ]
- [invited talk] High resolution geodynamo simulations with strongly-driven convection and low viscosity
N. Schaeffer, A. Fournier, D. Jault, J. Aubert
EGU General Assembly,
Vienna (Austria)
[ pdf | adsabs ]
- [invited talk] High resolution geodynamo simulations with strongly-driven convection and low viscosity
N. Schaeffer, A. Fournier, D. Jault, J. Aubert
AGU/CGU Joint Assembly,
Montreal (Canada)
- [poster] Turbulence Reduces Magnetic Diffusivity in a Liquid Sodium Experiment
H.-C. Nataf, S. Cabanes, N. Schaeffer
Physics of Exoplanets : From Earth-sized to Mini-Neptunes,
KITP Santa Barbara (USA)
[ adsabs ]
- [poster] Turbulence in Planetary Cores
H.-C. Nataf, N. Schaeffer
Physics of Exoplanets : From Earth-sized to Mini-Neptunes,
KITP Santa Barbara (USA)
- 2014 -
- [invited talk] Rotating dynamo turbulence : theoretical and numerical insights
Nathanael Schaeffer, A. Fournier, J. Aubert, D. Jault, F. Plunian, P. Zitzke
Mathematics of Turbulence : Geophysical and Astrophysical Turbulence,
IPAM, Los Angeles (USA)
[ pdf | video | pdf ]
- [talk] Rotating dynamo turbulence in numerical simulations
Nathanael Schaeffer, A. Fournier, J. Aubert, D. Jault, F. Plunian, P. Zitzke
Leverhulme trust kickoff meeting : Waves and Turbulence in Rotating, Stratified and Electrically Conducting Fluids,
Cambridge (UK)
[ pdf ]
- [talk] Turbulence reduces magnetic diffusivity in DTS liquid sodium experiment
Simon Cabanes, Nathanaël Schaeffer, Henri-Claude Nataf
AGU Fall Meeting,
San Francisco (USA)
- [talk] Filtering of short-term fluctuations of the dynamo field through the electrically conducting mantle
Dominique Jault, Nathanaël Schaeffer
AGU Fall Meeting,
San Francisco (USA)
- [talk] Dynamo Driven By Inertial Instabilities, Application to the Moon
D. Cebron, R. Hollerbach, S. Vantieghem, J. Noir, N. Schaeffer
AGU Fall Meeting,
San Francisco (USA)
[ adsabs ]
- 2013 -
- [talk] Turbuence in geodynamo simulations
N Schaeffer, A Fournier, J Aubert
European Turbulence Conference 14,
Lyon (FR)
[ pdf ]
- [talk] Turbulence in the magnetostrophic regime
S Cabanes, H-C Nataf, N Schaeffer
European Turbulence Conference 14,
Lyon (FR)
[ pdf ]
- [poster] Natural Turbulence From Centimeters to Megameters
Henri-Claude Nataf, Nathanaël Schaeffer
AGU Fall Meeting,
San Francisco (USA)
- [poster] Assessing the significance of QG-flow modes computed using Principal Component Analysis
M Alexandra Pais, Anna Morozova, Nathanael Schaeffer
EGU General Assembly,
Vienna (Austria)
[ pdf | adsabs ]
- 2012 -
- [poster] Can a sinking metallic diapir generate a dynamo ?
N Schaeffer, J Monteux, H Amit, P Cardin
AGU,
San Francisco (US)
[ pdf ]
- [poster] On the reflection of Alfvén waves and its implication for Earth’s core modeling
N Schaeffer, D Jault, P Cardin
SEDI,
Leeds (UK)
- [poster] Can a sinking metallic diapir generate a dynamo ?
J Monteux, N Schaeffer, H Amit, P Cardin
SEDI,
Leeds (UK)
- [poster] Core flow inversion and the geodynamo
M A Pais, N Schaeffer
SEDI,
Leeds (UK)
- [poster] Nested synthetic databases of observations for geomagnetic data
assimilation practice : interannual to decadal time scales.
N Schaeffer, A Fournier, J Aubert, E Thebault
SEDI,
Leeds (UK)
- [poster] Nested synthetic databases of observations for geomagnetic data
assimilation practice : millennial to centennial time scales.
A Fournier, J Aubert, E Thebault, N Schaeffer
SEDI,
Leeds (UK)
- [poster] Turbulence in the magnetostrophic regime.
S Cabanes, HC Nataf, N Schaeffer
SEDI,
Leeds (UK)
- [talk] On the role of boundary layer instabilities in core dynamics
HC Nataf, A Figueroa, N Schaeffer, D Schmitt
EGU,
Vienna (Austria)
[ pdf ]
- [poster] A database of synthetic observations for geomagnetic data assimilation practice
A Fournier, J Aubert, E Thebault, N Schaeffer
EGU,
Vienna (Austria)
[ pdf ]
- [invited talk] Fast transients in 3D dynamo models
A Fournier, N Schaeffer, J Aubert
AGU Fall Meeting,
San Francisco (US)
[ pdf ]
- 2011 -
- [talk] Information on the Motions within the Earth’s Core and on the Geomagnetic Field prior to Geomagnetic Data Inversion
D Jault, N Gillet, N Schaeffer
AGU Fall Meeting,
San-Francisco (USA)
[ pdf ]
- [talk] Can a sinking metallic diapir generate a dynamo ?
J Monteux, N Schaeffer, H Amit, P Cardin
EPSC-DPS,
Nantes (France)
[ pdf ]
- [invited talk] Quasi-Geostrophic Flows in the Earth Core as a Source for the Secular Variation
N. Schaeffer, Marie Drouard, Nicolas Gillet, Dominique Jault, Alexandra Pais, Franck Plunian
EGU,
Vienna (Austria)
[ pdf ]
- [poster] Symmetry, anisotropy and scales in the Earth-core flow and their effect on the Length-of-Day variation predictions
N. Schaeffer, M.A. Pais
EGU,
Vienna (Austria)
[ pdf ]
- [poster] A dynamo driven by zonal jets at the upper surface in the giant planets
C. Guervilly, P. Cardin, N. Schaeffer
EGU,
Vienna (Austria)
[ pdf ]
- 2010 -
- [lecture] Magnetohydrodynamique & Dynamo : Turbulence et Ordre
N. Schaeffer
Ecole thematique systemes complexes,
Rennes (France)
- [talk] Towards a faster Spherical Harmonic transform
N. Schaeffer
28/th IUGG Conference on Mathematical Geophysics,
Pisa (Italy)
- [poster] Rationale and geophysical evidence for quasi-geostrophic rapid dynamics within the Earth’s outer core
N. Gillet, N. Schaeffer, D. Jault
28/th IUGG Conference on Mathematical Geophysics,
Pisa (Italy)
- [poster] Extending the Quasi-Geostrophic flow model for core flow inversions.
A. Pais, N. Schaeffer
28/th IUGG Conference on Mathematical Geophysics,
Pisa (Italy)
- 2009 -
- [talk]
N Schaeffer
Centro de Fisica Computacional,
Coimbra (Portugal)
- [talk] Quasi-geostrophic waves in the Earth Core.
N. Schaeffer, D. Jault
Waves and Instabilities in Geophysical and Astrophysical Flows",
Porquerolles (France)
- [talk] Quasi-geostrophic MHD waves in the Earth Core.
N. Schaeffer, D. Jault
Workshop "Wave Turbulence",
Paris (France)
- 2008 -
- [poster] Quasi-Geostrophic Motions in the Earth’s Core : in What Conditions are They Expected ?
N. Schaeffer, D. Jault
AGU Fall Meeting,
San Francisco (USA)
- 2007 -
- [talk] MHD in plasma devices
N. Schaeffer
GDR Dynamo meeting,
Paris (France)
[ pdf ]
- [talk] Influence of an elliptic instability on the merging of a co-rotating vortex pair
N. Schaeffer, S. Le Dizès
Congrès Français de Mécanique,
Grenoble (France)
[ pdf ]
- [poster] Non-linear MHD analysis of Advanced Tokamak Scenario
N. Schaeffer, P. Maget, H. Lütjens, G.T.A. Huysmans, JET EFDA contributors
Proceedings of the 34th EPS Conference on Plasma Physics,
Warsaw (Pologne)
[ pdf ]
- [talk] Elliptic instabilities in vortex pairs with axial flow
N. Schaeffer, S. Le Dizès, L. Lacaze
FAR-Wake second annual review,
Feb. 2007, Toulouse (France)
- 2006 -
- [talk] Instabilities in co-rotating vortices with axial flow
N. Schaeffer, S. Le Dizès, L. Lacaze
FAR-Wake WP1 meeting,
Málaga (Spain)
- [talk] Instabilities in co-rotating vortices with axial flow
N. Schaeffer, S. Le Dizès, L. Lacaze
Euromech Fluid Mechanics Conference,
Stockholm (Sweden)
- 2005 -
- [talk] Quasigeostrophic dynamos at low Magnetic Prandtl number
N. Schaeffer, P. Cardin
American Geophysical Union,
San Francisco (USA)
- [poster] Quasigeostrophic dynamos at low Magnetic Prandtl number
N. Schaeffer, P. Cardin
IAGA,
Toulouse (France)
- [talk] Quasigeostrophic dynamos at low Magnetic Prandtl number
N. Schaeffer, P. Cardin
European Geosciences Union,
Vienne (Autriche)
[ pdf ]
- [talk] Turbulence and Rossby waves in a rapidly rotating sphere
N. Schaeffer, P. Cardin
European Geosciences Union,
Vienne (Autriche)
[ pdf ]
- [talk] Quasi-geostrophic dynamos
N. Schaeffer, P. Cardin
Perm Dynamo Days,
Perm (Russie)
- 2004 -
- [talk] Quasi-geostrophic dynamos
N. Schaeffer, P. Cardin
XXI International Congress of Theoretical and Applied Mechanics,
Varsovie (Pologne)
- [talk] Scale separation approach for low Pm rotating dynamos
N. Schaeffer, P. Cardin
Joint meeting COST - GDR Dynamo,
Paris (France)
- 2003 -
- [talk] Scale separation approach for low magnetic Prandtl number rotating dynamos
N. Schaeffer, P. Cardin
Subgrid Scale Turbulence Methods for Geodynamo Simulations workshop,
Los Angeles (USA)
- [talk] Instabilities of internal shear layers in rotating fluids
N. Schaeffer, P. Cardin
IUGG,
Sapporo (Japon)
- [talk] La dynamo terrestre, une approche hybride 2D-3D
N. Schaeffer, P. Cardin
Annual congres of the SFP,
Lyon (France)
- [poster] Instabilities of rotating shear layers
N. Schaeffer, P. Cardin
Planetary dynamos summer school,
Les Houches (France)
- 2002 -
- [poster] Stewartson layer instabilities
N. Schaeffer, P. Cardin
8th Symposium of Symposium on Earth Deep Interior,
Lake Tahoe (USA)
- 2001 -
- [poster] Interaction of rising and sinking mantle plumes
N. Schaeffer, M. Manga
American Geophysical Union Spring Meeting,
Boston (USA)