A New Mechanism for Maunder-like Solar Minima: Phase Synchronization Dynamics in a Simple Nonlinear Oscillator of Magnetohydrodynamic Rossby Waves

 

Programa: 
meteorologia
Primeiro Autor: 
Breno Raphaldini
Ano de Publicação: 
2020
Nome da Revista/Jornal: 
The Astrophysical Journal Letters
Tipo de publicação: 
Artigo publicado em Revista
localidade: 
Publicação Internacional
TítuloA New Mechanism for Maunder-like Solar Minima: Phase Synchronization Dynamics in a Simple Nonlinear Oscillator of Magnetohydrodynamic Rossby Waves
Tipo da publicaçãoJournal Article
Ano de Publicação2020
AutoresRaphaldini B, Medeiros E, Raupp CFM, Teruya AS
JournalThe Astrophysical Journal
Volume890
Issue1
PaginaçãoL13 - L19
Data de Publicação02/2020
ISSN2041-8213
Resumo

The long-term solar cycle variability and Grand solar minima remain open questions from a theoretical point of view. Recently, a growing basis of evidence points out to the role of the magnetic Rossby waves in the solar cycle. Here we present a simple deterministic model, based on a low-order spectral representation of the barotropic quasi-geostrophic-magnetohydrodynamic equations for the Solar tachocline. This model supports the idea of the long-term behavior of the solar activity as a result of nonlinear interaction of magnetic Rossby modes. Solutions show that Rossby waves undergo irregular switches between periods of high activity and periods of suppressed activity, resembling the Maunder minimum. Low-energy states in the model are associated with the synchronization of the dynamical phases of the waves. These irregular transitions in the amplitudes of the waves are reminiscent of the observed time series of the solar activity. This suggests that Maunder-like states arise from chaotic transitions between regimes with different degrees of organization in the system.

URLhttps://iopscience.iop.org/article/10.3847/2041-8213/ab71fd
DOI10.3847/2041-8213/ab71fd
Short TitleApJ
AnexoTamanho
51.Raphaldini_2020_ApJL_890_L13.pdf930.4 KB