Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Geophys. J. Int. (2009) 179, 14141428 doi: 10.1111/j.1365-246X.2009.04361.x GJIGeomagnetism,rockmagnetismandpalaeomagnetism
 

Summary: Geophys. J. Int. (2009) 179, 1414­1428 doi: 10.1111/j.1365-246X.2009.04361.x
GJIGeomagnetism,rockmagnetismandpalaeomagnetism
Modelling the palaeo-evolution of the geodynamo
Julien Aubert,1
St´ephane Labrosse2
and Charles Poitou3
1Dynamique des Fluides G´eologiques, Institut de Physique du Globe de Paris, Universit´e Paris-Diderot, INSU/CNRS, 4 Place Jussieu, 75252,
Paris cedex 05, France. E-mail: aubert@ipgp.jussieu.fr
2Laboratoire des sciences de la Terre, Ecole normale sup´erieure de Lyon, Universit´e de Lyon, CNRS UMR 5570, 46 All´ee d'Italie, 69364 Lyon Cedex 07,
France
3Pal´eomagn´etisme, Institut de Physique du Globe de Paris, Universit´e Paris-Diderot, INSU/CNRS, 4 Place Jussieu, 75252, Paris cedex 05, France
Accepted 2009 August 11. Received 2009 May 22; in original form 2008 December 10
S U M M A R Y
Although it is known that the geodynamo has been operating for at least 3.2 Ga, it remains
difficult to infer the intensity, dipolarity and stability (occurrence of reversals) of the Precam-
brian magnetic field of the Earth. In order to assist the interpretation of palaeomagnetic data,
we produce models for the long-term evolution of the geodynamo by combining core ther-
modynamics with a systematic scaling analysis of numerical dynamo simulations. We update
earlier dynamo scaling results by exploring a parameter space, which has been extended in
order to account for core aspect ratios and buoyancy source distributions relevant to Earth in

  

Source: Aubert, Julien - Institut de Physique du Globe de Paris

 

Collections: Geosciences