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Vertical coherence of short-periodic current variations (1971)

Siedler, Gerold

Elsevier

In: Deep Sea Research and Oceanographic Abstracts, 18 (2). pp. 179-191.

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Publication Date: 2016-09-22

Description: A study is described which attempts to obtain information about the vertical correlation of ocean currents at frequencies higher than inertial. Current velocity and temperature data for sensor separations of 4–12 m were taken with a mooring at ‘Site D’. The coherence and phase spectra for velocity component pairs reveals that motions are rotational at low frequencies. A cut-off frequency exists above which coherence drops to low values. The limiting frequency coincides with the minimum Väisälä frequency of the total water column. These cross-spectral properties support the assumption that the motion in this frequency range is governed by internal wave dynamics. The coherence and phase spectra of temperature pairs indicate that a field of temperature structure is superimposed on the mean field which is weakly correlated to the field of motion.

Type: Article , PeerReviewed

Format: text

DOI: 10.1016/0011-7471(71)90108-2

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