Sustaining Earth's magnetic dynamo

M Landeau, A Fournier, HC Nataf, D Cébron… - Nature Reviews Earth & …, 2022 - nature.com
Earth's magnetic field is generated by fluid motions in the outer core. This geodynamo has
operated for over 3.4 billion years. However, the mechanism that has sustained the …

A hydrogen-enriched layer in the topmost outer core sourced from deeply subducted water

T Kim, JG O'Rourke, J Lee, S Chariton… - Nature …, 2023 - nature.com
The Earth's core–mantle boundary presents a dramatic change in materials, from silicate to
metal. While little is known about chemical interactions between them, a thin layer with a …

[HTML][HTML] Towards reconciling experimental and computational determinations of Earth's core thermal conductivity

M Pozzo, CJ Davies, D Alfè - Earth and Planetary Science Letters, 2022 - Elsevier
The thermal conductivity (κ) of Earth's core is a critical parameter that controls predictions of
core cooling rate, inner core age and the power available to the geodynamo. However, the …

Regionally-triggered geomagnetic reversals

F Terra-Nova, H Amit - Scientific Reports, 2024 - nature.com
Systematic studies of numerical dynamo simulations reveal that the transition from dipole-
dominated non-reversing fields to models that exhibit reversals occurs when inertial effects …

CCMOC: a new view of the Earth's outer core through the global coda correlation wavefield

X Ma, H Tkalčić - Physics of the Earth and Planetary Interiors, 2023 - Elsevier
Increasing seismic evidence has accumulated, suggesting that the Earth's outer core
consists of distinct zones of low P-wave velocities in the top and bottom regions relative to …

Dynamics in Earth's Core Arising from Thermo‐Chemical Interactions with the Mantle

CJ Davies, S Greenwood - Core‐Mantle Co‐Evolution: An …, 2023 - Wiley Online Library
Thermo‐chemical interactio ns at the core‐mantle boundary (CMB) play an integral role in
determining the dynamics and evolution of Earth's deep interior. This review considers the …

[HTML][HTML] On the evolution of thermally stratified layers at the top of Earth's core

S Greenwood, CJ Davies, JE Mound - Physics of the Earth and Planetary …, 2021 - Elsevier
Stable stratification at the top of the Earth's outer core has been suggested based upon
seismic and geomagnetic observations, however, the origin of the layer is still unknown. In …

CCREM: New reference Earth model from the global coda‐correlation wavefield

X Ma, H Tkalčić - Journal of Geophysical Research: Solid Earth, 2021 - Wiley Online Library
The existing reference Earth models have provided an excellent one‐dimensional
representation of Earth's properties as a function of its radius and explained many seismic …

Internal gravity waves in a stratified layer atop a convecting liquid core in a non-rotating spherical shell

M Bouffard, B Favier, D Lecoanet… - Geophysical Journal …, 2022 - academic.oup.com
Seismic and magnetic observations have suggested the presence of a stably stratified layer
atop Earth's core. Such a layer could affect the morphology of the geomagnetic field and the …

A regime diagram for the slurry F-layer at the base of Earth's outer core

J Wong, CJ Davies, CA Jones - Earth and Planetary Science Letters, 2021 - Elsevier
Seismic observations of a slowdown in P wave velocity at the base of Earth's outer core
suggest the presence of a stably-stratified region known as the F-layer. This raises an …