J. Aubert, J. M. Aurnou, and J. Wicht, The magnetic structure of convection-driven numerical dynamos, Geophysical Journal International, vol.172, issue.3, pp.945-956, 2008.
DOI : 10.1111/j.1365-246X.2007.03693.x
URL : https://hal.archives-ouvertes.fr/hal-00365069

U. R. Christensen and J. Aubert, Scaling properties of convection? driven dynamos in rotating spherical shells and application to planetary magnetic fields, Geophys, J. Int, vol.166, issue.1, pp.97-114, 2006.

U. R. Christensen and A. Tilgner, Power requirement of the geodynamo from ohmic losses in numerical and laboratory dynamos, Nature, vol.329, issue.6988, pp.429-169, 1038.
DOI : 10.1038/nature01560

U. R. Christensen, J. Aubert, and G. Hulot, Conditions for Earth-like geodynamo models, Earth and Planetary Science Letters, vol.296, issue.3-4, pp.3-4, 2010.
DOI : 10.1016/j.epsl.2010.06.009
URL : https://hal.archives-ouvertes.fr/hal-00540375

C. C. Finlay, International geomagnetic reference field: The eleventh generation, Geophys. J. Int, vol.183, issue.3, pp.1216-1230, 2010.
URL : https://hal.archives-ouvertes.fr/hal-00527822

A. Fournier, G. Hulot, D. Jault, W. Kuang, A. Tangborn et al., An Introduction to Data Assimilation and Predictability in Geomagnetism, Space Science Reviews, vol.65, issue.3, pp.247-29110, 2010.
DOI : 10.1007/s11214-010-9669-4
URL : https://hal.archives-ouvertes.fr/insu-00565056

R. Holme and N. Olsen, Core surface flow modelling from high-resolution secular variation, Geophysical Journal International, vol.166, issue.2, pp.518-528, 2006.
DOI : 10.1111/j.1365-246X.2006.03033.x

L. Hongre, G. Hulot, and A. Khokhlov, An analysis of the geomagnetic field over the past 2000 years, Physics of the Earth and Planetary Interiors, vol.106, issue.3-4, pp.3-4, 1998.
DOI : 10.1016/S0031-9201(97)00115-5

G. Hulot and J. ?. , A statistical approach to the Earth's main magnetic field, Physics of the Earth and Planetary Interiors, vol.82, issue.3-4, pp.3-4, 1994.
DOI : 10.1016/0031-9201(94)90070-1

G. Hulot, C. C. Finlay, C. G. Constable, N. Olsen, and M. Mandea, The Magnetic Field of Planet Earth, Space Science Reviews, vol.138, issue.3, pp.159-222, 2010.
DOI : 10.1007/s11214-010-9644-0

G. Hulot, F. Lhuillier, and J. Aubert, Earth's dynamo limit of predictability, Geophysical Research Letters, vol.83, issue.6, pp.10-1029, 2010.
DOI : 10.1029/2009GL041869

A. Jackson, A. R. Jonkers, and M. R. Walker, Four centuries of geomagnetic secular variation from historical records, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol.358, issue.1768, pp.358-957, 1768.
DOI : 10.1098/rsta.2000.0569

A. Khokhlov, G. Hulot, and J. Carlut, Towards a self-consistent approach to palaeomagnetic field modelling, Geophysical Journal International, vol.145, issue.1, pp.157-171, 2001.
DOI : 10.1111/j.1365-246X.2001.01386.x
URL : https://hal.archives-ouvertes.fr/insu-01409126

V. Lesur, I. Wardinski, M. Rother, and M. Mandea, GRIMM: the GFZ Reference Internal Magnetic Model based on vector satellite and observatory data, Geophysical Journal International, vol.173, issue.2, pp.382-394, 2008.
DOI : 10.1111/j.1365-246X.2008.03724.x

V. Lesur, I. Wardinski, M. Hamoudi, and M. Rother, The second generation of the GFZ Reference Internal Magnetic Model: GRIMM?2, Earth Planets Space, pp.765-773, 2010.

F. J. Lowes, Mean-square values on sphere of spherical harmonic vector fields, Journal of Geophysical Research, vol.71, issue.8, pp.71-2179, 1966.
DOI : 10.1029/JZ071i008p02179

F. J. Lowes, Spatial Power Spectrum of the Main Geomagnetic Field, and Extrapolation to the Core, Geophysical Journal International, vol.36, issue.3, pp.717-730, 1974.
DOI : 10.1111/j.1365-246X.1974.tb00622.x

P. Mauersberger, Das Mittel der Energiedichte des geomagnetischen Hauptfeldes an der Erdoberfläche und seine säkulare Änderung, Gerlands Beitr, Geophys, vol.65, pp.207-215, 1956.

S. Maus, C. Manoj, J. Rauberg, I. Michaelis, and H. Lühr, NOAA/ NGDC candidate models for the 11th generation International Geomagnetic Reference Field and the concurrent release of the 6th generation Pomme magnetic model, Earth Planets Space, pp.729-735, 2010.

N. Olsen, H. Lühr, T. J. Sabaka, M. Mandea, M. Rother et al., CHAOS-a model of the Earth's magnetic field derived from CHAMP, ??rsted, and SAC-C magnetic satellite data, Geophysical Journal International, vol.166, issue.1, pp.67-75, 2006.
DOI : 10.1111/j.1365-246X.2006.02959.x

N. Olsen, M. Mandea, T. J. Sabaka, and L. Tøffner?clausen, The CHAOS?3 geomagnetic field model and candidates for the 11th generation IGRF, Earth Planets Space, pp.719-727, 2010.

F. Stacey, Physics of the Earth, 1992.

H. Von-storch and F. Zwiers, Statistical Analysis in Climate Research, 2001.
DOI : 10.1017/CBO9780511612336