On the impact of true polar wander on heat flux patterns at the core–mantle boundary

Abstract ∼ 1  Gyr) using two recently published mantle convection models: one model driven by a plate reconstruction and a second that self-consistently produces a plate-like behaviour. We compute the geoid in both models to correct for TPW. In the plate-driven model, we compute a total geoid and a geoid in which lateral variations of viscosity and density are suppressed above 350 km depth. An alternative to TPW correction is used for the plate-driven model by simply repositioning the model in the original paleomagnetic reference frame of the plate reconstruction. The average TPW rates range between 0.4 and 1.8° Myr- 1 - 1 ≤ 10  Myr). Those rapid variations modify the latitudinal distribution of the CMB heat flux, which is known to affect the stability of the magnetic dipole in geodynamo simulations. A principal component analysis (PCA) is computed to obtain the dominant CMB heat flux pattern in the different cases. These heat flux patterns are representative of the mantle convection cases studied here and can be used as boundary conditions for geodynamo models.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: On the impact of true polar wander on heat flux patterns at the core–mantle boundary ; volume:15 ; number:5 ; year:2024 ; pages:617-637 ; extent:21 ; Solid earth ; 15, Heft 5 (2024), 617-637 (gesamt 21)

Contributors, Places and Time

• Creator: Frasson, Thomas ; Labrosse, Stéphane ; Nataf, Henri-Claude ; Coltice, Nicolas ; Flament, Nicolas

Further information

• DOI: 10.5194/se-15-617-2024
• URN: urn:nbn:de:101:1-2405160415282.816722007828
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 11:02 AM CEST