Vertical coherence of short-periodic current variations

Siedler, Gerold (1971) Vertical coherence of short-periodic current variations Deep Sea Research and Oceanographic Abstracts, 18 (2). pp. 179-191. DOI 10.1016/0011-7471(71)90108-2.

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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.

Document Type: Article
Keywords: Physical oceanography
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
Refereed: Yes
DOI etc.: 10.1016/0011-7471(71)90108-2
ISSN: 0011-7471
Date Deposited: 10 Sep 2012 13:53
Last Modified: 22 Sep 2016 12:03

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