Generation of a strong magnetic field using uniform heat flux at the surface of the core

Nature Geoscience

Volumn 2, Issue 11, 2009, Pages 802-805

  Sakuraba, Ataru ^a   Roberts, Paul H ^b  

^a UNIVERSITY OF TOKYO   (Japan)

^b UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 70350765311     PISSN: 17520894     EISSN: 17520908     Source Type: Journal    
DOI: 10.1038/ngeo643     Document Type: Article

References (30)

1. Buffett, B. A. Earth's core and the geodynamo. Science 288, 2007-2012 (2000)
2. Kono, M. & Roberts, P. H. Recent geodynamo simulations and observations of the geomagnetic field. Rev. Geophys. 40, 1013 (2002)
3. Braginsky, S. I. & Roberts, P. H. Equations governing convection in the Earth's core and the geodynamo. Geophys. Astrophys. Fluid Dyn. 79, 1-97 (1995)
4. Kageyama, A., Miyagoshi, T. & Sato, T. Formation of current coils in geodynamo simulations. Nature 454, 1106-1109 (2008)
5. Christensen, U. R. & Aubert, J. Scaling properties of convection-driven dynamos in rotating spherical shells and application to planetary magnetic fields. Geophys. J. Int. 166, 97-114 (2006)
6. Takahashi, F., Matsushima, M. & Honkura, Y. Scale variability in convection-driven MHD dynamos at low Ekman number. Phys. Earth Planet. Inter. 167, 168-178 (2008)
7. Glatzmaier, G. A. & Roberts, P. H. A three-dimensional self-consistent computer simulation of a geomagnetic field reversal. Nature 377, 203-209 (1995)
8. Kageyama, A. et al. Computer simulation of a magnetohydrodynamic dynamo. II. Phys. Plasmas 2, 1421-1431 (1995)
9. Kuang, W. & Bloxham, J. An Earth-like numerical dynamo model. Nature 389, 371-374 (1997)
10. Takahashi, F., Matsushima, M. & Honkura, Y. Simulations of a quasi-Taylor state geomagnetic field including polarity reversals on the Earth Simulator. Science 309, 459-461 (2005)
11. Busse, F. H. & Simitev, R. D. Parameter dependences of convection-driven dynamos in rotating spherical shells. Geophys. Astrophys. Fluid Dyn. 100, 341-361 (2006)
12. Kutzner, C. & Christensen, U. R. From stable dipolar towards reversing numerical dynamos. Phys. Earth Planet. Inter. 131, 29-45 (2002)
13. Braginsky, S. I. & Roberts, P. H. Encyclopedia of Geomagnetism and Paleomagnetism (Springer, 2007)
14. Glatzmaier, G. A., Coe, R. S., Hongre, L. H. & Roberts, P. H. The role of the Earth's mantle in controlling the frequency of geomagnetic reversals. Nature 401, 885-890 (1999)
15. Christensen, U. R. & Olson, P. Secular variation in numerical geodynamo models with lateral variations of boundary heat flow. Phys. Earth Planet. Inter. 138, 39-54 (2003)
16. Finlay, C. C. & Jackson, A. Equatorially dominated magnetic field change at the surface of Earth's core. Science 300, 2084-2086 (2003)
17. Bloxham, J. The expulsion of magnetic flux from the Earth's core. Geophys. J. R. Astron. Soc. 87, 669-678 (1986)
18. Olson, P., Christensen, U. R. & Glatzmaier, G. A. Numerical modeling of the geodynamo: Mechanisms of field generation and equilibration. J. Geophys. Res. 104, 10383-10404 (1999)
19. Kageyama, A. & Sato, T. Generation mechanism of a dipole field by a magnetohydrodynamic dynamo. Phys. Rev. E 55, 4617-4626 (1997)
20. Sparrow, R. J., Goldstein, R. J. & Jonsson, V. K. Thermal instability in a horizontal fluid layer: Effect of boundary conditions and non-linear temperature profile. J. Fluid Mech. 18, 513-528 (1964)
21. Hurle, D. T. J., Jakeman, E. & Pike, E. R. On the solution of the BÈnard problem with boundaries of finite conductivity. Proc. R. Soc. Lond. A 296, 469-475 (1967)
22. Takehiro, S., Ishiwatari, M., Nakajima, K. & Hayashi, Y. Linear stability of thermal convection in rotating systems with fixed heat flux boundaries. Geophys. Astrophys. Fluid Dyn. 96, 439-459 (2002)
23. Roberts, P. H. On the thermal instability of a rotating fluid sphere containing heat sources. Phil. Trans. R. Soc. Lond. A 263, 93-117 (1968)
24. Sakuraba, A. Linear magnetoconvection in rotating fluid spheres permeated by a uniform axial magnetic field. Geophys. Astrophys. Fluid Dyn. 96, 291-318 (2002)
25. Roberts, P. H. Kinematic dynamo models. Phil. Trans. R. Soc. Lond. A 272, 663-698 (1972)
26. Aubert, J. Steady zonal flows in spherical shell dynamos. J. Fluid Mech. 542, 53-67 (2005)
27. Fearn, D. R. Thermal and magnetic instabilities in a rapidly rotating sphere. Geophys. Astrophys. Fluid Dyn. 14, 103-126 (1979)
28. Christensen, U. R., Holzwarth, V. & Reiners, A. Energy flux determines magnetic field strength of planets and stars. Nature 457, 167-169 (2009)
29. Nakagawa, T. & Tackley, P. J. Lateral variations in CMB heat flux and deep mantle seismic velocity caused by a thermal-chemical-phase boundary layer in 3D spherical convection. Earth Planet. Sci. Lett. 271, 348-358 (2008)
30. Sakuraba, A. & Kono, M. Effect of the inner core on the numerical solution of the magnetohydrodynamic dynamo. Phys. Earth Planet. Inter. 111, 105-121 (1999)