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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 5 | Copyright

Special issue: Nonlinear waves and turbulence in space

Nonlin. Processes Geophys., 14, 649-654, 2007
https://doi.org/10.5194/npg-14-649-2007
© Author(s) 2007. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  24 Oct 2007

24 Oct 2007

Intermittent heating of the solar corona by MHD turbulence

É. Buchlin É. Buchlin
  • Space and Atmospheric Physics group, Blackett Laboratory, Imperial College, London, UK

Abstract. As the dissipation mechanisms considered for the heating of the solar corona would be sufficiently efficient only in the presence of small scales, turbulence is thought to be a key player in the coronal heating processes: it allows indeed to transfer energy from the large scales to these small scales. While Direct numerical simulations which have been performed to investigate the properties of magnetohydrodynamic turbulence in the corona have provided interesting results, they are limited to small Reynolds numbers. We present here a model of coronal loop turbulence involving shell-models and Alfvén waves propagation, allowing the much faster computation of spectra and turbulence statistics at higher Reynolds numbers. We also present first results of the forward-modelling of spectroscopic observables in the UV.

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