A perturbation analysis of the Lagrangian equations of motion is used to examine the diffusion induced by a random field of internal waves. At second order there is a random field of shearing motion in the horizontal plane. We calculate the single‐particle, two‐particle, and patch diffusivities that result from this motion. Patch and two‐particle diffusivity both increase as scale raised to the power of 4/3 for an internal wave field in which the spectrum of horizontal velocity varies as ω−2.
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Sanderson et al. (1988) studied this question.
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