%0 Journal Article %T True dipole wander %+ Morton K. Blaustein Department of Earth and Planetary Sciences [Baltimore] %+ Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA %+ Institut de Physique du Globe de Paris (IPG Paris) %+ Mobile USA, Bellevue, WA 98006 USA %A Olson, Peter %A Landeau, Maylis %A Reynolds, Evan %Z National Science Foundation (NSF)EAR-1135382European Union (EU)703767 %< avec comité de lecture %@ 0956-540X %J Geophysical Journal International %I Oxford University Press (OUP) %V 215 %N 3 %P 1523 - 1529 %8 2018 %D 2018 %R 10.1093/gji/ggy349 %K Reversals %K Dynamics: convection currents and mantle plumes %K Core %K Mantle processes %K Dynamo theories and simulations %K Palaeomagnetism %Z Sciences of the Universe [physics] %Z Sciences of the Universe [physics]/Earth SciencesJournal articles %X S U M M A R Y A fundamental assumption in palaeomagnetism is that the geomagnetic field closely approximates a geocentric axial dipole in time average. Here we use numerical dynamos driven by heterogeneous core-mantle boundary heat flux from a mantle global circulation model to demonstrate how mantle convection produces true dipole wander, rotation of the geomagnetic dipole on geologic timescales. Our heterogeneous mantle-driven dynamos show a dipole rotation about a near-equatorial axis in response to the transition in lower mantle heterogeneity from a highly asymmetric pattern at the time of supercontinent Pangea to a more symmetric pattern today. This predicted dipole rotation overlaps with a palaeomagnetically inferred rotation in the opposite direction and suggests that some events previously interpreted as true polar wander also include true dipole wander. %G English %2 https://insu.hal.science/insu-02930249/document %2 https://insu.hal.science/insu-02930249/file/ggy349.pdf %L insu-02930249 %U https://insu.hal.science/insu-02930249 %~ INSU