scholarly journals On the Penetration of Meridional Circulation below the Solar Convection Zone

2008 ◽  
Vol 674 (1) ◽  
pp. 498-510 ◽  
Author(s):  
P. Garaud ◽  
N. H. Brummell
Keyword(s):  
Convection Zone ◽  
Meridional Circulation ◽  
Solar Convection Zone ◽  
Solar Convection

scholarly journals Λ-effect, Meridional Flow and the Differential Solar Rotation

1991 ◽  
Vol 130 ◽  
pp. 172-177
Author(s):  
G. Rüdiger ◽  
I. Tuominen
Keyword(s):  
Angular Momentum ◽  
Convection Zone ◽  
Meridional Circulation ◽  
Solar Rotation ◽  
Meridional Flow ◽  
Rossby Number ◽  
Solar Convection Zone ◽  
Solar Convection ◽  
Turbulence Parameters ◽  
Simple Picture

AbstractRotation laws for the solar convection zone are produced by the Λ-effect in rotating anisotropic turbulence fields. In this paper we use the structure of the turbulence parameters introduced by Rüdiger and Kichatinov (1990), based on a simplified turbulence model. When we neglect the meridional circulation, for small inverse Rossby numbers the angular velocity isolines are spherical, while for increasing inverse Rossby number they approach more and more the helioseismologically derived shape. This simple picture becomes more complicated if the meridional circulation is allowed to act as an angular momentum transporter.

scholarly journals Can short time delays influence the variability of the solar cycle?

2010 ◽  
Vol 6 (S271) ◽  
pp. 288-296
Author(s):  
Laurène Jouve ◽  
Michael R. E. Proctor ◽  
Geoffroy Lesur
Keyword(s):  
Solar Cycle ◽  
Convection Zone ◽  
Mean Field ◽  
Period Doubling ◽  
Temporal Modulation ◽  
Solar Convection Zone ◽  
Flux Tubes ◽  
Solar Convection ◽  
Short Time ◽  
Period Doubling Bifurcations

AbstractWe present the effects of introducing results of 3D MHD simulations of buoyant magnetic fields in the solar convection zone in 2D mean-field Babcock-Leighton models. In particular, we take into account the time delay introduced by the rise time of the toroidal structures from the base of the convection zone to the solar surface. We find that the delays produce large temporal modulation of the cycle amplitude even when strong and thus rapidly rising flux tubes are considered. The study of a reduced model reveals that aperiodic modulations of the solar cycle appear after a sequence of period doubling bifurcations typical of non-linear systems. We also discuss the memory of such systems and the conclusions which may be drawn concerning the actual solar cycle variability.

Sign in / Sign up

Export Citation Format

Share Document