Can heterogeneous core-mantle electromagnetic coupling control geomagnetic reversals?

Physics of the Earth and Planetary Interiors

Volumn 112, Issue 3-4, 1999, Pages 159-170

  Brito, Daniel ^a   Aurnou, Jonathan ^a   Olson, Peter ^a  

^a JOHNS HOPKINS UNIVERSITY   (United States)

Author keywords

Core mantle coupling; D structure; Electromagnetic torques; Geomagnetic field; Polarity Reversals

Indexed keywords

CORE-MANTLE BOUNDARY; COUPLING; GEODYNAMO; GEOMAGNETIC FIELD; MAGNETIC REVERSAL;

EID: 0033574368     PISSN: 00319201     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0031-9201(98)00158-7     Document Type: Article

References (46)

1. Arfken, G., 1985. Mathematical Methods for Physicists. Academic Press, San Diego.
2. Aurnou J.M., Buttles J.L., Neumann G.A., Olson P.L. Electromagnetic core-mantle coupling and paleomagnetic reversal paths. Geophys. Res. Lett. 23:1996;2705-2708.
3. Barton C.E., McFadden P.L. Inclination shallowing and preferred transitional VGP paths. Earth Planet. Sci. Lett. 140:1996;147-157.
4. Brito, D., 1998. Approches expérimentales et théoriques de la dynamique du noyau terrestre: Tourbillon géostrophique de gallium liquide dans un champ magnétique, anisotropie et rotation de la graine, chemins d'inversion. Université Paris VII, PhD thesis, 305 pp.
5. Buffett B.A. Gravitational oscillations in the length of day. Geophys. Res. Lett. 23:1996;2279-2282.
6. Buffett B.A. A mechanism for decade fluctuations in the length of day. Geophys. Res. Lett. 23:1996;3803-3806.
7. Channell J.E.T., Lehman B. The last two geomagnetic reversals recorded in high-deposited-rate sediments drift. Nature. 389:1997;712-715.
8. Clement B.M. Geographical distribution of transitional VGPs: evidence for non-zonal equatorial symmetry during Matuyama-Brunhes geomagnetic reversal. Earth Planet. Sci. Lett. 104:1991;48-58.
9. Clement B.M., Rodda P., Smith E., Sierra L. Recurring transitional geomagnetic field geometries. Geophys. Res. Lett. 22:1995;3171-3174.
10. Constable C.G., Johnson C.L., Lund S.P. 3000 Years of quasi-global geomagnetic secular variation. EOS Trans. Am. Geophys. Union. 77:1996;143.
11. Courtillot V., Valet J.P. Secular variation of the Earth's magnetic field: from jerks to reversals. C.R. Acad. Sci. Paris. 320:1995;903-922.
12. Garnero E.J., Helmberger D.V. Seismic detection of a thin laterally varying boundary layer at the base of the mantle beneath the Central-Pacific. Geophys. Res. Lett. 23:1996;977-980.
13. Garnero, E.J., Revenaugh, J., Williams, Q., Lay, T., Kellogg, L., 1998. Ultra-low velocity zone at the core-mantle boundary. In: Gurnis, M., Buffett, B.A., Knittle, E., Wysession, M. (Eds.), The Core-Mantle Boundary. Am. Geophys. Union.
14. Glatzmaier G.A., Roberts P.H., Coe R.S. Studying reversal frequency with geodynamo simulations. EOS Trans. Am. Geophys. Union. 77:1997;195.
15. Greff-Lefftz M., Legros H. Core-mantle coupling and polar motion. Phys. Earth Planet. Inter. 91:1995;273-283.
16. Gubbins D., Coe R.S. Longitudinally confined geomagnetic reversal paths from non-dipolar transition fields. Nature. 362:1993;51-53.
17. Gubbins D., Sarson G. Geomagnetic field morphologies from a kinematic dynamo model. Nature. 368:1994;51-55.
18. Hide R. Interaction between the Earth's liquid core and solid mantle. Nature. 222:1969;1055-1056.
19. Hoffman K. Dipolar reversal states of the geomagnetic field and core-mantle dynamics. Nature. 359:1995;789-794.
20. Holme R. Electromagentic core-mantle coupling: I. Explaining decadal changes in the length of day. Geophys. J. Int. 132:1998;167-180.
21. Jault D., Le Mouël J.L. The topographic torque associated with a tangentially geostrophic motion at the core surface and inferences on the flow inside the core. Geophys. Astrophys. Fluid Dyn. 48:1989;273-296.
22. Jeanloz, R., 1993. Chemical reactions at the Earth's core-mantle boundary: summary of evidence and geomagnetic implications. In: Relating Geophysical Structures and Processes: The Jeffreys Volume. AGU Geophys. Monograph 76, 121-127.
23. Johnson C.L., Constable C.G. The time-averaged geomagnetic field as recorded by lava flows over the past 5 Ma. Geophys. J. Int. 122:1995;489-519.
24. Johnson C.L., Constable C.G. The time-averaged geomagnetic field: global and regional biases for 0-5 Ma. Geophys. J. Int. 131:1997;643-666.
25. Kellogg L.H. Growing the Earth's D″-layer layer: effects of density variations at the core-mantle boundary. Geophys. Res. Lett. 24:1997;2749-2752.
26. Kellogg L.H., King S. Effect of mantle plumes on the growth of D″ by reaction between the core and mantle. Geophys. Res. Lett. 20:1993;379-382.
27. Laj C., Mazaud A., Weeks R., Fuller M., Herrero-Berverra E. Geomagnetic reversal paths. Nature. 351:1991;447.
28. Lay T., Williams Q., Garnero E.J. The core-mantle boundary layer and deep Earth dynamics. Nature. 392:1998;461-468.
29. Loper D., Lay T. The core-mantle boundary region. J. Geophys. Res. 100:1995;6397-6420.
30. Love J.J. Paleomagnetic volcanic data and geomagnetic regularity of reversals and excursions. J. Geophys. Res. 103(12):1998;435-12452.
31. Merrill, R.T., McElhinny, M.W., McFadden, P.L., 1996. The Magnetic Field of the Earth. Academic Press, London.
32. Moffatt, H.K., 1978. Magnetic Field Generation in Electrically Conducting Fluids. Cambridge Univ. Press, New York.
33. Olson P.L., Glatzmaier G.A. Magnetoconvection and thermal coupling of the Earth's core and mantle. Phil. Trans. R. Astron. Soc. A. 354:1996;1413-1424.
34. Poirier J.P., Le Mouël J.L. Does infiltration of core material into the lower mantle affect the observed geomagnetic field? Phys. Earth Planet. Inter. 73:1992;29-37.
35. Prevot M., Camps P. Absence of preferred longitude sectors for poles from volcanic records of geomagnetic reversals. Nature. 366:1993;56-57.
36. Quidelleur X., Valet J.P. Paleomagnetic records of excursions and reversals: possible biases cased by magnetization artefacts. Phys. Earth Planet. Inter. 8:1994;27-48.
37. Rochester M.G. Geomagnetic core-mantle coupling. J. Geophys. Res. 67:1962;4833-4836.
38. Runcorn S.K. Polar path in geomagnetic reversals. Nature. 356:1992;654-656.
39. Runcorn S.K. Preferred paths of VGPs in geomagnetic reversal records and their significance. Surveys in Geophys. 17:1996;229-232.
40. Stix M., Roberts P.H. Time-dependent electromagnetic core-mantle coupling. Phys. Earth Planet. Inter. 36:1984;49-60.
41. Tric E., Laj C., Jehanno C., Valet J.P., Kissel C., Mazaud A., Iccarino S. High resolution record of the Upper Olduvai Transition from Po Valley (Italy) sediments: support for dipolar transition geometry? Phys. Earth Planet. Inter. 65:1991;319-336.
42. Valet J.P., Meynadier L. Geomagnetic field intensity and reversals during the past four million years. Nature. 336:1993;234-238.
43. Valet J.P., Tucholka P., Courtillot V., Meynadier L. Paleomagnetic constraints on the geometry of the geomagnetic field during reversals. Nature. 356:1992;400-407.
44. Williams Q., Garnero E.J. Seismic evidence for partial melt at the base of Earth's mantle. Science. 273:1996;1528-1530.
45. Xu S., Szeto A.M.K. Gravitational coupling in the Earth's interior revisited. Geophys. J. Int. 118:1994;94-100.
46. Zhang K.K., Gubbins D. Convection in a rotating spherical fluid shell with an inhomogeneous temperature boundary condition at infinite Prandtl number. J. Fluid Mech. 250:1993;209-232.