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EPSONDE: an instrument to measure turbulence in the deep ocean

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1 Author(s)
Oakey, N.S. ; Canadian Dept. of Fisheries & Oceans, Bedford Inst. of Oceanogr., Darmouth, NS, Canada

EPSONDE is a tethered free-fall profiling system used to obtain temperature microstructure and velocity turbulence data to a depth of at least 1500 m. EPSONDE, which carries a variety of slow and fast sensors, is deployed on a loose kevlar multiconductor cable by a specialized wire-handling system. Data are transmitted from this underwater unit (1792 samples per second) to a shipboard system which includes a dedicated microcomputer for data logging and online data processing. The performance of this system is demonstrated by discussing a study of turbulent mixing processes in a lens of Mediterranean water (a MEDDY) found at a depth of 1000 m in the Canary basin. These studies indicate that turbulent kinetic energy dissipation may be an important mechanism in determining the decay and lifetime of a MEDDY

Published in:

Oceanic Engineering, IEEE Journal of  (Volume:13 ,  Issue: 3 )

Date of Publication:

Jul 1988

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