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- Publications
- Influence

An Active Sun Throughout the Maunder Minimum

- J. Beer, S. Tobias, N. O. Weiss
- Physics
- 1 July 1998

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

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

Dynamo properties of the turbulent velocity field of a saturated dynamo

- F. Cattaneo, S. Tobias
- Physics
- 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

Sensitivity of stratified turbulence to the buoyancy Reynolds number

- P. Bartello, S. Tobias
- Physics
- 25 June 2013

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 turbulence.… Expand

β-Plane Magnetohydrodynamic Turbulence in the Solar Tachocline

- S. Tobias, P. Diamond, D. Hughes
- Physics
- 13 September 2007

This Letter discusses the role of a weak toroidal magnetic field in modifying the turbulent transport properties of stably stratified rotating turbulence in the tachocline. A local two-dimensional… 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

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

Direct statistical simulation of out-of-equilibrium jets.

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

We present direct statistical simulation of jet formation on a β plane, solving for the statistics of a fluid flow via an expansion in cumulants. Here we compare an expansion truncated at second… 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

For how long will the current grand maximum of solar activity persist

- J. A. Abreu, J. Beer, F. Steinhilber, S. Tobias, N. Weiss
- Geology
- 1 October 2008

[1] Understanding the Sun’s magnetic activity is important because of its impact on the Earth’s environment. The sunspot record since 1610 shows irregular 11-year cycles of activity; they are… Expand