Synchronization in intermittent turbulence and spatiotemporal chaos in the solar-terrestrial environment / Sincronização em turbulência intermitente e caos espaço-temporal no ambiente solar-terrestre

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

In this work we analyze synchronization due to multiscale interactions in observations of intermittent turbulence and numerical simulations of spatiotemporal intermittency in neutral fluids and space plasmas. This study is carried out in two parts. First, we apply two distinct nonlinear techniques, kurtosis and phase coherence index, to measure the degree of non-Gaussianity and phase synchronization of intermittent magnetic field turbulence observed in the ambient solar wind, in the solar photosphere and in the ground, and intermittent atmospheric turbulence observed in the Amazon rain forest canopy. Next, we analyze a spatially-extended model of nonlinear waves in fluids and plasmas to identify transient coherent structures responsible for the on-off spatiotemporal intermittency observed in the time series of energy. We quantify the degree of amplitude-phase synchronization using the power-phase spectral entropy at the onset of spatiotemporal chaos. The observational and theoretical results indicate that the amplitude-phase Synchronization may be the origin of intermittency in fully-developed turbulence in the solar-terrestrial environment.

ASSUNTO(S)

synchronization turbulence spatiotemporal chaos intermittency coherent structures sincronização turbulência caos espaçotemporal intermitência estruturas coerentes

ACESSO AO ARTIGO

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