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Open Access Publications from the University of California

On the nature of bursting in transport and turbulence in drift wave-zonal flow systems

  • Author(s): Malkov, MA
  • Diamond, PH
  • Rosenbluth, MN
  • et al.

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The predictions of the extended predator-prey model of the coupled spectral dynamics of drift wave-zonal flow turbulence are presented. The model exhibits three possible types of time-dependent solutions, depending on system parameters, which are: (1) quasiperiodic bursting of the transport and turbulence intensity levels; (2) oscillatory relaxation to a stationary state, and in the collisionless limit; (3) an intensity pulse followed by saturation of zonal flow. These solutions are consistent with the time dependent behavior recently observed in the global gyrokinetic simulations. © 2001 American Institute of Physics.

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