Observations of Quasi-Two-Dimensional Turbulence in Tidal Currents

C. Veth Netherlands Institute for Sea Research, Texel, The Netherlands

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J. T. F. Zimmerman Netherlands Institute for Sea Research, Texel, The Netherlands

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Abstract

Observational evidence for the existence of quasi-two-dimensional turbulence in tidal currents is derived from the auto- and cross-correlation spectra of vertically separated current meters. The observed quasi- two-dimensional turbulence seems to exhibit a k−1 wavenumber spectrum over an eddy length-scale interval from 600 to 60 m, which is thought to be produced by topographic vortex stretching over the irregular sea bed in a tidal area.

Abstract

Observational evidence for the existence of quasi-two-dimensional turbulence in tidal currents is derived from the auto- and cross-correlation spectra of vertically separated current meters. The observed quasi- two-dimensional turbulence seems to exhibit a k−1 wavenumber spectrum over an eddy length-scale interval from 600 to 60 m, which is thought to be produced by topographic vortex stretching over the irregular sea bed in a tidal area.

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