On Doppler-spreading models of internal waves

  • Broutman D
  • Macaskill C
  • McIntyre M
 et al. 
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Present Doppler-spreading models for short internal waves in the atmosphere and the ocean either neglect the time dependence of the background long-wave shear entirely, or ignore time-dependent effects in their parameterization of dissipation. We use ray and numerical simulations to examine the Doppler spreading of a short internal-wave packet by an inertia-wave packet. The results are enough to show that time dependence in the long-wave shear can make a significant difference to short-wave behavior, and will need to be taken into account in future modelling efforts.

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  • Dave Broutman

  • C. Macaskill

  • Michael E. McIntyre

  • James W. Rottman

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