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Intimate '96: shallow water tomography in the sea of the condemned
Coelho, Emanuel; Jesus, S. M.; Stephan, Yang; Demoulin, Xavier; Porter, Michael B.As is well-known, the tidal force of the moon and the sun can cause notable changes in the sea level. Besides this so-called barotropic effect, the tidal force also drives internal waves in a daily rhythm. Thus, the internal wave spectrum is often dominated by a single component with perhaps 10 km from crest to crest. This ‘‘internal tide’’ tends to propagate toward shore and has its greatest height near the sh...
INTIMATE'96. A shallow water tomography experiment devoted to the study of inte...
Demoulin, X.; Stephan, Y.; Jesus, S. M.; Coelho, E.; Porter, Michael B.The INTIMATE (INternal Tide Investigation by Means of Acoustic Tomography Experiment) project is devoted to the study of internal tides by use of acoustic tomography. The first exploratory experiment was carried out in June 1996 on the continental shelf off the west coast of Portugal. A towed broadband acoustic source and a 4-hydrophone vertical array were used. Acoustic data were collected for 5 days, includin...
Exploiting reliable features of the ocean channel response
Porter, Michael B.; Jesus, S. M.; Stephan, Yann; Demoulin, Xavier; Coelho, EmanuelModelling sound propagation in shallow water is notoriously difficult. The main difficulties are, of course, ocean variability characteristic of coastal waters and the typpicaly downward refracting profiles that make the acoustic field extremely sensitive to the bottom characteristics. Meanwhile accurate prediction of transimission loss curves at a single frequency requires that the relative phase of each surfa...
Internal tide impact measured by an acoustic tomography experiment
Stephan, Y.; Demoulin, X.; Jesus, S. M.; Coelho, E.; Porter, Michael B.The INTIMATE project is devoted to the internal study of tides by the use of acoustic tomography schemes. The first exploratory experiment was carried out in June 1996 on the continental shelf off the coast of Portugal using a towed broadband acoustic source a four-hydrophone vertical array.
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