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An Active Sun Throughout the Maunder Minimum

Measurements of 10Be concentration in the Dye 3 ice core show that magnetic cycles persisted throughout the Maunder Minimum, although the Sun's overall activity was drastically reduced and sunspots… Expand

Sensitivity of stratified turbulence to the buoyancy Reynolds number

- P. Bartello, S. Tobias
- PhysicsJournal of Fluid Mechanics
- 14 May 2013

Abstract In this article we present direct numerical simulations of stratified flow at resolutions of up to $204{8}^{2} \times 513$ , to explore scalings for the dynamics of stably stratified… Expand

Convective and absolute instabilities of fluid flows in finite geometry

- S. Tobias, M. Proctor, E. Knobloch
- Physics
- 15 February 1998

Abstract Dynamics of linear and nonlinear waves in driven dissipative systems in finite domains are considered. In many cases (for example, due to rotation) the waves travel preferentially in one… Expand

On the instability of magnetohydrodynamic shear flows

We consider the linear stability of an ideal, plane–parallel magnetohydrodynamic shear flow with velocity u = (U(z),0, 0) and magnetic field B = (B(z), 0,0). We show how Howard's semicircle theorem… Expand

Direct statistical simulation of out-of-equilibrium jets.

- S. Tobias, J. Marston
- Physics, MedicinePhysical review letters
- 18 September 2012

TLDR

Dynamo properties of the turbulent velocity field of a saturated dynamo

- F. Cattaneo, S. Tobias
- PhysicsJournal of Fluid Mechanics
- 1 February 2009

In order better to understand how dynamo systems saturate, we study the kinematic dynamo properties of velocity fields that arise from nonlinearly saturated dynamos. The technique is implemented by… Expand

Transport and Storage of Magnetic Field by Overshooting Turbulent Compressible Convection

- S. Tobias, N. Brummell, T. Clune, J. Toomre
- Physics
- 10 March 2001

We present the results of a series of numerical experiments that investigate the transport of magnetic —elds by turbulent penetrative compressible convection. We —nd that magnetic —ux is… Expand

Modulation and symmetry changes in stellar dynamos

- E. Knobloch, S. Tobias, N. Weiss
- Physics
- 11 July 1998

Stellar dynamos are governed by non-linear partial differential equations (PDEs) which admit solutions with dipole, quadrupole or mixed symmetry (i.e. with different parities). These PDEs possess… Expand

Pumping of Magnetic Fields by Turbulent Penetrative Convection

- S. Tobias, N. Brummell, T. Clune, J. Toomre
- Physics
- 1 August 1998

A plausible scenario for solar dynamo action is that the large-scale organized toroidal magnetic field is generated by the action of strong radial shear at the base of the solar convection zone,… Expand

Relating stellar cycle periods to dynamo calculations

- S. Tobias
- Physics
- 21 May 1998

ABSTRA C T Stellar magnetic activity in slowly rotating stars is often cyclic, with the period of the magnetic cycle depending critically on the rotation rate and the convective turnover time of the… Expand

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