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Effects of cyclic fluctuations in meridional circulation using a low-order dyna...
Lopes, I; Passos, DWe develop and subsequently explore the solution space of a simple flux transport dynamo model that incorporates a time-dependent large-scale meridional circulation. Based on recent observations, we prescribed an analytical form for the amplitude of this circulation and study its impact in the evolution of the magnetic field. We find that cyclic variations in the amplitude and frequency of the meridional flow a...
Solar Variability Induced in a Dynamo Code by Realistic Meridional Circulation ...
Lopes, I; Passos, DIn this work we use an already-published method to infer a variation profile for the solar meridional circulation over the last 250 years. We feed this variation profile into a numerical dynamo code, and we reconstruct a sunspot time series that acts as a proxy for solar cycle activity. We perform three simulations with slightly different parameters, and the results are compared with the observational data. The...
A Low-Order Solar Dynamo Model: Inferred Meridional Circulation Variations Sinc...
Passos, D; Lopes, iIn this work we present the possible variations that the meridional circulation of the Sun might have undergone during the last 250 years. In order to do this, we reduce an α-Ω dynamo to a low-order system that focuses on the time evolution of one of the solar magnetic field components. Afterward we used a method based on the analysis of phase space of the superficial toroidal magnetic field to infer changes in...
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