Modelling the palaeo-evolution of the geodynamo

Geophysical Journal International

Volumn 179, Issue 3, 2009, Pages 1414-1428

  Aubert, Julien ^a   Labrosse, Stéphane ^b   Poitou, Charles ^a  

^a INSTITUT DE PHYSIQUE DU GLOBE DE PARIS   (France)

^b UNIVERSITÉ LYON 1   (France)

Author keywords

Dynamo: theories and simulations; Palaeointensity; Palaeomagnetic secular variation; Reversals: process, timescale, magnetostratigraphy

Indexed keywords

COMPUTER SIMULATION; CORE-MANTLE BOUNDARY; GEODYNAMO; MAGNETIC FIELD; MAGNETIC INTENSITY; MAGNETIC REVERSAL; MAGNETOSTRATIGRAPHY; MODELING; PALEOMAGNETISM; PRECAMBRIAN; SECULAR VARIATION; THERMODYNAMICS;

CALLUNA VULGARIS;

EID: 70450196688     PISSN: 0956540X     EISSN: 1365246X     Source Type: Journal    
DOI: 10.1111/j.1365-246X.2009.04361.x     Document Type: Article

References (53)

1. Aubert J, Aurnou J, Wicht J. The magnetic structure of convection-driven numerical dynamos. Geophys. J. Int. 2008, 172:945-956.
2. Biggin AJ, Strik GHMA, Langereis CG. Evidence for a very-long-term trend in geomagnetic secular variation. Nat. Geosci. 2008, 1(6):395-398.
3. Biggin AJ, Strik GHMA, Langereis CG. The intensity of the geomagnetic field in the late-archaean: new measurements and an analysis of the updated IAGA palaeointensity database. Earth Planets Space 2009, 61:9-22.
4. Braginsky SI, Roberts PH. Equations governing convection in Earths core and the geodynamo. Geophys. Astrophys. Fluid Dyn. 1995, 79(1-4):1-97.
5. Buffett B, Huppert H, Lister J, Woods A. On the thermal evolution of the Earth's core. J. geophys. Res. 1996, 101(B4):7989-8006.
6. Christensen U, Aubert J. Scaling properties of convection-driven dynamos in rotating spherical shells and application to planetary magnetic fields. Geophys. J. Int. 2006, 117:97-114.
7. Christensen U, Tilgner A. Power requirement of the geodynamo from ohmic losses in numerical and laboratory dynamos. Nature 2004, 429:169-171. doi
8. Christensen UR. A deep dynamo generating Mercury's magnetic field. Nature 2006, 444(7122):1056-1058.
9. Coe RS, Glatzmaier GA. Symmetry and stability of the geomagnetic field. Geophys. Res. Lett. 2006, 33(21). doi
10. de Wijs G, Kresse G, Vocadlo L, Dobson D, Alfe D, Gillan M, Price G. The viscosity of liquid iron at the physical conditions of the Earth's core. Nature 1998, 392(6678):805-807.
11. Dunlop D, Yu Y, Channell JET, Kent DV, Lowrie W, Meert JG. Intensity and polarity of the geomagnetic field during Precambrian time. Timescales of the Paleomagnetic Field 2004, Vol. 145:85-100. in, pp, eds, AGU Monograph
12. Dunlop DJ. Palaeomagnetism-a more ancient shield. Nature 2007, 446(7136):623-625.
13. Dziewonski A, Anderson D. Preliminary reference Earth model PREM. Phys. Earth planet. Int. 1981, 25:297-356.
14. Eide EA, Torsvik TH. Paleozoic supercontinental assembly, mantle flushing, and genesis of the Kiaman superchron. Earth planet. Sci. Let. 1996, 144:389-402.
15. Hale CJ. Paleomagnetic data suggest link between the Archean-Proterozoic boundary and inner-core nucleation. Nature 1987, 329(6136):233-237.
16. Hernlund JW, Thomas C, Tackley PJ. Phase boundary double crossing and the structure of Earth's deep mantle. Nature 2005, 434:882-886. doi
17. Hirao N, Ohtani E, Kondo T, Endo N, Kuba T, Suzuki T, Kikegawa T. Partitioning of potassium between iron and silicate at the core-mantle boundary. Geophys. Res. Lett. 2006, 33(8). doi
18. Hulot G, Gallet Y. On the interpretation of virtual geomagnetic pole (VGP) scatter curves. Phys. Earth planet. Int. 1996, 95(1-2):37-53.
19. Hulot G, Gallet Y. Do superchrons occur without any palaeomagnetic warning?. Earth planet. Sci. Lett. 2003, 210(1-2):191-201.
20. Kutzner C, Christensen U. From stable dipolar to reversing numerical dynamos. Phys. Earth planet. Int. 2002, 131:29-45.
21. Labrosse S. Thermal and magnetic evolution of the Earth's core. Phys. Earth planet. Int. 2003, 140:127-143.
22. Labrosse S, Poirier JP, Le Mouël JL. On cooling of the Earth's core. Phys. Earth planet. Int. 1997, 99:1-17.
23. Labrosse S, Poirier JP, Le Mouel JL. The age of the inner core. Earth planet. Sci. Let. 2001, 190(3-4):111-123.
24. Labrosse S, Hernlund JW, Coltice N. A crystallizing dense magma ocean at the base of the Earth's mantle. Nature 2007, 450(7171):866-869.
25. Lay T, Hernlund J, Garnero EJ, Thorne MS. A post-perovskite lens and D″ heat flux beneath the central pacific. Science 2006, 314(5803):1272-1276.
26. Lay T, Hernlund J, Buffett BA. Core-mantle boundary heat flow. Nat. Geosci. 2008, 1(1):25-32.
27. Lister JR. Expressions for the dissipation driven by convection in the Earth's core. Phys. Earth planet. Int. 2003, 140(1-3):145-158.
28. Lister JR, Buffett BA. The strength and efficiency of thermal and compositional convection in the geodynamo. Phys. Earth planet. Int. 1995, 91(1-3):17-30.
29. Macouin M, Valet J, Besse J. Long-term evolution of the geomagnetic dipole moment. Phys. Earth planet. Int. 2004, 147(2-3):239-246.
30. McDonough WF, Carlson RW, Holland HD, Turekia DD. Compositional model for the Earth's core. Treatise on Geochemistry 2003, 547-569. in, pp, eds, Elsevier, Oxford
31. McFadden PL, Merrill RT, McElhinny MW, Lee SH. Reversals of the earths magnetic-field and temporal variations of the dynamo families. J. geophys. Res. 1991, 96(B3):3923-3933.
32. Nakagawa T, Tackley PJ. Deep mantle heat flow and thermal evolution of the Earth's core in thermochemical multiphase models of mantle convection. Geophys. Geochem. Geosystems. 2005, 6. doi
33. Olson P. A simple physical model for the terrestrial dynamo. J. geophys. Res. 1981, 86(NB11):875-882.
34. Olson P. Gravitational dynamos and the low frequency geomagnetic secular variation. Proc. Natl. Acad. Sci. 2008, 104(51):20 159-20 166.
35. Olson P, Christensen UR. Dipole moment scaling for convection-driven planetary dynamos. Earth planet. Sci. Let. 2006, 250(3-4):561-571.
36. Olson P, Christensen U, Glatzmaier GA. Numerical modelling of the geodynamo: mechanisms of field generation and equilibration. J. geophys. Res. 1999, 104(B5):10 383-10 404.
37. Pavlov V, Gallet Y. Middle Cambrian high magnetic reversal frequency (Kulumbe River section, northwestern Siberia) and reversal behaviour during the Early Palaeozoic. Earth planet. Sci. Let. 2001, 185(1-2):173-183.
38. Pavlov V, Gallet Y. A third superchron during the Early Paleozoic. Episodes 2005, 28(2):78-84.
39. Perrin M, Schnepp E. IAGA paleointensity database: distribution and quality of the data set. Phys. Earth planet. Int. 2004, 147(2-3):255-267.
40. Rama Murthy V, Van Westrenen W, Fei Y. Experimental evidence that potassium is a substantial radioactive heat source in planetary cores. Nature 2003, 423:163-165.
41. Roberts P, Glatzmaier G. The geodynamo, past, present and future. Geophys. Astrophys. Fluid Dyn. 2001, 94(1-2):47-84.
42. Secco RA, Shloessin HH. The electrical resistivity of solid and liquid Fe at pressures up to 7 GPa. J. geophys. Res. 1989, 94:5887-5894.
43. Smirnov A, Tarduno J. Secular variation of the Late Archean Early Proterozoic geodynamo. Geophys. Res. Let. 2004, 31(16). doi
44. Stacey FD, Loper DE. A revised estimate of the conductivity of iron alloy at high pressure and implications for the core energy balance. Phys. Earth planet. Int. 2007, 161(1-2):13-18.
45. Stanley S, Zuber MT, Bloxham J. Using reversed magnetic flux spots to determine a planet's inner core size. Geophys. Res. Lett. 2007, 34(19). doi
46. Stevenson DJ, Spohn T, Schubert G. Magnetism and thermal evolution of the terrestrial planets. Icarus 1983, 54(3):466-489.
47. Strik G, Blake T, Zegers T, White S, Langereis C. Palaeomagnetism of flood basalts in the Pilbara Craton, Western Australia: Late Archaean continental drift and the oldest known reversal of the geomagnetic field. J. geophys. Res. 2003, 108(B12). doi
48. Tarduno JA, Cottrell RD, Watkeys MK, Bauch D. Geomagnetic field strength 3.2 billion years ago recorded by single silicate crystals. Nature 2007, 446(7136):657-660.
49. Tauxe L, Yamazaki T, Schubert G. Paleointensities. Treatise on Geophysics. 5- Geomagnetism 2007, in, ed., Elsevier
50. Thellier E, Thellier O. Sur l'intensité du champ magnétique terrestre dans le passé historique et géologique. Annales de Geophysique 1959, 285-376. pp
51. van der Hilst R, De Hoop MV, Wang P, Shim S-H, Ma P, Tenorio L. Seismostratigraphy and thermal structure of Earth's core-mantle boundary region. Science 2007, 315:1813-1817.
52. Varga P, Denis C, Varga T. Tidal friction and its consequences in palaeogeodesy, in the gravity field variations and in tectonics. J. Geodyn. 1998, 25(1-2):61-84.
53. Wicht J. Inner-core conductivity in numerical dynamo simulations. Phys. Earth planet. Int. 2002, 132:281-302.