Investigation of intermittency in magnetohydrodynamics and solar wind turbulence: scale-dependent kurtosis
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Citation
Export citationWan, M., Osman, K. T., Matthaeus, W. H., & Oughton, S. (2012). Investigation of intermittency in magnetohydrodynamics and solar wind turbulence: scale-dependent kurtosis. The Astrophysical Journal, 744(2), 171.
Permanent Research Commons link: https://hdl.handle.net/10289/8580
Abstract
The behavior of scale-dependent (or filtered) kurtosis is studied in the solar wind using magnetic field measurements from the ACE and Cluster spacecraft at 1 AU. It is also analyzed numerically with high-resolution magnetohydrodynamic spectral simulations. In each case the filtered kurtosis increases with wavenumber, implying the presence of coherent structures at the smallest scales. This phase coupling is related to intermittency in solar wind turbulence and the emergence of non-Gaussian statistics. However, it is inhibited by the presence of upstream waves and other phase-randomizing structures, which act to reduce the growth of kurtosis.
Date
2012Type
Publisher
IOP PUBLISHING LTD
Rights
© 2012. The American Astronomical Society.