Effects of the Librationally Induced Flow in Mercury’s Fluid Core with an Outer Stably Stratified Layer
Fleur Seuren,
Santiago A. Triana,
Jérémy Rekier
et al.
Abstract:Observational constraints on Mercury’s thermal evolution and magnetic field indicate that the top part of the fluid core is stably stratified. Here we compute how a stable layer affects the core flow in response to Mercury’s main 88 day longitudinal libration, assuming various degrees of stratification, and study whether the core flow can modify the libration amplitude through viscous and electromagnetic torques acting on the core–mantle boundary (CMB). We show that the core flow strongly depends on the streng… Show more
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