96 citations · 395 across the 25 of their papers we have counts for
9 papers · 1 filter
Effects of global core-mantle boundary topography on outer-core convection and topographic torques
Tobias G. Oliver, Eric G. Blackman, John A. Tarduno +1
Topography at the core-mantle boundary (CMB) couples the outer core to the mantle and likely generates observable variations in the length of day (LOD) and the geomagnetic field…
Asymptotics of spherical dynamos exhibiting a small-scale MAC balance
Justin A. Nicoski, Andy Esseln, Chris Davies +1
Understanding the asymptotic behaviour of numerical dynamo models is critical for extrapolating results to the physical conditions that characterise terrestrial planetary cores. He…
Turbulence in Earth's core generates large topographic torques on the mantle
Tobias G. Oliver, Eric G. Blackman, John A. Tarduno +1
Seismic and geodynamic studies indicate that the boundary between the Earth's liquid outer core and solid mantle is not spherical, but is likely characterized by topography in the…
Magnetic quenching of the inverse cascade in rapidly rotating convective turbulence
Stefano Maffei, Michael A. Calkins, Keith Julien +1
We present results from an asymptotic magnetohydrodynamic model that is suited for studying the rapidly rotating, low viscosity regime typical of the electrically conducting fluid…
Inertia-less convectively-driven dynamo models in the limit of low Rossby number and large Prandtl number
Michael A. Calkins, Keith Julien, Steven M. Tobias
Compositional convection is thought to be an important energy source for magnetic field generation within planetary interiors. The Prandtl number, , characterizing compositiona…
Convection-driven kinematic dynamos at low Rossby and magnetic Prandtl numbers
Michael A. Calkins, Louie Long, David Nieves +2
Most large-scale planetary magnetic fields are thought to be driven by low Rossby number convection of a low magnetic Prandtl number fluid. Here kinematic dynamo action is investig…
Convection-driven kinematic dynamos at low Rossby and magnetic Prandtl numbers: single mode solutions
Michael A. Calkins, Keith Julien, Steven M. Tobias +2
The onset of dynamo action is investigated within the context of a newly developed low Rossby, low magnetic Prandtl number, convection-driven dynamo model. This multiscale model re…
A Multiscale Dynamo Model Driven by Quasi-geostrophic Convection
Michael A. Calkins, Keith Julien, Steven M. Tobias +1
A convection-driven multiscale dynamo model is developed in the limit of low Rossby number for the plane layer geometry in which the gravity and rotation vectors are aligned. The s…
The Breakdown of the Anelastic Approximation in Rotating Compressible Convection: Implications for Astrophysical Systems
Michael A. Calkins, Keith Julien, Philippe Marti
The linear theory for rotating compressible convection in a plane layer geometry is presented for the astrophysically-relevant case of low Prandtl number gases. When the rotation r…