Time-Lapse Acoustic Imaging of the Oceanic Energy Cascade
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Active-source marine seismic reflection records have been used to construct acoustic images of oceanic thermohaline structure. In the water column, acoustic boundaries are produced by variations in temperature and, to a lesser extent, salinity. Acoustic waves generated by an array of airguns suspended behind a vessel are reflected from these boundaries and recorded by long cables of hydrophones which are towed beneath the sea surface. Careful signal processing of these records yields acoustic images of thermohaline structure with both horizontal and vertical resolutions of
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Caulfield, Colm-cille