Using reversed magnetic flux spots to determine a planet's inner core size

Geophysical Research Letters

Volumn 34, Issue 19, 2007, Pages

  Stanley, S ^a   Zuber, M T ^b   Bloxham, J ^c  

^a UNIVERSITY OF TORONTO   (Canada)

^b MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

^c HARVARD UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ATMOSPHERIC THERMODYNAMICS; MAGNETIC FIELD EFFECTS; MAGNETIC FLUX; TOPOGRAPHY;

INNER CORE SIZE; THERMAL EVOLUTION;

PLANETARY SURFACE ANALYSIS;

GANYMEDE; INNER CORE; JUPITER; MAGNETIC FIELD; MERCURY (PLANET); NUMERICAL MODEL; PLANETARY EVOLUTION; SATURN; THERMAL EVOLUTION;

EID: 37249091761     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/2007GL030892     Document Type: Article

References (38)

1. Acuna, M. H., et al. (1999), Global distribution of crustal magnetization discovered by the Mars Global Surveyor MAG/ER experiment, Science, 284, 790-793.
2. Arkani-Hamed, J. (2004), Timing of the Martian core dynamo, J. Geophys. Res., 109, E03006, doi:10.1029/2003JE002195.
3. Aumou, J., D. Brito, and P. Olson (1998), Anomalous rotation of the inner core and the toroidal magnetic field, J. Geophys. Res., 103, 9721-9738.
4. Aumou, J., S. Andreadis, L. Zhu, and P. Olson (2003), Experiments on convection in Earth's core tangent cylinder, Earth Planet. Sci. Lett., 212, 119-134.
5. Bloxham, J. (1986), The expulsion of magnetic flux from the Earth's core, Geophys. J. R. Astron. Soc., 87, 669-678.
6. Bloxham, J. (2000a), Sensitivity of the geomagnetic axial dipole to thermal core-mantle interactions, Nature, 405, 63-65.
7. Bloxham, J. (2000b), The effect of thermal core-mantle interactions on the palaeomagnetic secular variation, Philos. Trans. R. Soc. London, Ser. A, 358, 1171-1179.
8. Bloxham, J., and A. Jackson (1991), Fluid flow near the surface of Earth's outer core, Rev. Geophys., 29, 97-120.
9. Busse, F. (1970), Thermal instabilities in rapidly rotating systems, J. Fluid Mech., 44, 441-460.
10. Christensen, U., and P. Olson (2003), Secular variation in numerical geodynamo models with lateral variations of boundary heat flow, Phys. Earth Planet. Inter., 138, 39-54.
11. Christensen, U., P. Olson, and G. Glatzmaier (1998), A dynamo model interpretation of geomagnetic field structures, Geophys. Res. Lett., 25, 1565-1568.
12. Constable, C. (1992), Link between geomagnetic reversal paths and secular variation of the field over the past 5 myr, Nature, 358, 230-233.
13. Grote, E., F. Busse, and A. Tilgner (2000), Effects of hyperdiffusivities on dynamo simulations, Geophys. Res. Lett., 27, 2001-2004.
14. Gubbins, D., and J. Bloxham (1987), Morphology of the geomagnetic field and implications for the geodynamo, Nature, 325, 509-511.
15. Gubbins, D., and R. Coe (1993), Longitudinally confined geomagnetic reversal paths from non-dipolar transition fields, Nature, 362, 51-53.
16. Gutenberg, B. (1913), Uber die konstitution des erdinnern, erschlossen aus erdbebenbeobachtungen, Z. Geophys., 14, 1217-1218.
17. Hauck, S. A., II, J. M. Aumou, and A. J. Dombard (2006), Sulfur's impact on core evolution and magnetic field generation on Ganymede, J. Geophys. Res., 111, E09008, doi:10.1029/2005JE002557.
18. Heimpel, M., J. Aurnou, F. Al-Shamali, and N. Gomez Perez (2005), A numerical study of dynamo action as a function of spherical shell geometry, Earth Planet. Sci. Lett., 236, 542-557.
19. Hulot, G., C. Eymin, B. Langlais, M. Mandea, and N. Olsen (2002), Smallscale structure of the geodynamo inferred from Oersted and Magsat satellite data, Nature, 416, 620-623.
20. Jackson, A. (2003), Intense equatorial flux spots on the surface of the Earth's core, Nature, 424, 760-763.
21. Kono, M., and P. Roberts (2002), Recent geodynamo simulations and observations of the geomagnetic field, Rev. Geophys., 40(4), 1013, doi:10.1029/2000RG000102.
22. Kuang, W., and J. Bloxham (1997), An Earth-like numerical dynamo model, Nature, 389, 371-374.
23. Kuang, W., and J. Bloxham (1999), Numerical modeling of magnetohydrodynamic convection in a rapidly rotating spherical shell: Weak and strong field dynamo action, J. Comput. Phys., 153, 51-81.
24. Lehmann, I. (1936), Inner earth, Bur. Cent. Seismol. Int. A, 14, 3-31.
25. Olson, P., and J. Aurnou (1999), A polar vortex in the Earth's core, Nature, 402, 170-173.
26. Olson, P., and U. Christensen (2002), The time-averaged magnetic field in numerical dynamos with non-uniform boundary heat flow, Geophys. J Int., 151, 809-823.
27. Olson, P., U. Christensen, and G. A. Glatzmaier (1999), Numerical modeling of the geodynamo: Mechanisms of field generation and equilibration, J. Geophys. Res., 104, 10,383-10,404.
28. Proudman, J. (1916), On the motions of solids in a liquid possessing vorticity, Proc. R. Soc. London, Ser A., 92, 65-68.
29. Schubert, G., M. Ross, D. Stevenson, and T. Spohn (1988), Mercury's thermal history and the generation of its magnetic field, in Mercury, edited by F. Vilas, C. Chapman, and M. Matthews, pp. 429-460, Univ. of Ariz. Press, Tucson.
30. Schubert, G., K. Chan, X. Liao, and K. Zhang (2004), Planetary dynamos: Effects of electrically conducting flows overlying turbulent regions of magnetic field generation, Icarus, 172, 305-315.
31. Sreenivasan, B., and C. Jones (2005), Structure and dynamics of the polar vortex in the Earth's core, Geophys. Res. Lett., 32, L20301, doi:10.1029/2005GL023841.
32. Stanley, S., and J. Bloxham (2004), Convective-region geometry as the cause of Uranus' and Neptune's unusual magnetic fields, Nature, 428, 151-153.
33. Stanley, S., J. Bloxham, W. Hutchison, and M. Zuber (2005), Thin shell dynamo models consistent with Mercury's weak observed magnetic field, Earth Planet. Sci. Lett., 234, 27-38.
34. Stevenson, D., T. Spohn, and G. Schubert (1983), Magnetism and thermal evolution of the terrestrial planets, Icarus, 54, 466-489.
35. Taylor, G. (1917), Motion of solids in fluids when the flow is not irrotational, Proc. R. Soc. London, Ser A., 93, 99-113.
36. Zhang, K., and C. Jones (1997), The effect of hyperviscosity on geodynamo models, Geophys. Res. Lett., 24, 2869-2872.
37. Zhang, K., and G. Schubert (2000), Magnetohydrodynamics in rapidly rotating spherical systems, Annu. Rev. Fluid Mech., 32, 409-443.
38. Zhang, K., C. Jones, and G. Sarson (1998), The dynamical effects of hyperviscosity on numerical geodynamo models, Stud. Geophys. Geod., 42, 247-253.