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Open Access item Underwater acoustic propagation model to simulate seismic oceanography experiments

Authors:Kormann, Jean
Cobo, Pedro
Ranz Guerra, Carlos
Keywords:Seismic oceanography, Seismic reflection, Water masses, Thermohaline intrusion, Internal waves, Mesoscale eddies, Underwater acoustic propagation model, Berkhout spatial convolution operators, Perfectly Matched Layer (PML) condition
Issue Date:Jul-2007
Publisher:International Institute of Acoustics and Vibration
Citation:14th International Congress in Sound and Vibration (ICSV14), S-Underwater and ship acoustics
Abstract:Seismic reflection is a technique used for decades to profile the earth layering beneath the ocean with a high lateral and vertical resolution. In the other hand, oceanographers use probes to obtain the properties of the water layer with a rather lesser lateral resolution. Seismic oceanography focuses the powerful tools of seismics into the water layer to reveal its fine structure with a high lateral resolution. The re-processing of the in-water reflected waves in seismic data has allowed to image eddies, termohaline intrusions and internal waves. Synthetic models of such seismic experiments in water permit to foresee the effects of oceanographic gradients in the propagated waves. This paper describes a synthetic model of such seismic oceanography experiments. The model uses Berkhout convolution operators to extrapolate the wave field from the seismic source to the hydrophones taking into account the sound velocity structure of the water layer. Due to the small amplitudes of the scattered field, special attention is paid to the absorbing properties of the artificial boundaries of the medium.
Description:Communication presented at the 14th International Congress on Sound Vibration, Cairns, Australia, 9-12 July 2007.
Appears in Collections:(IA) Comunicaciones congresos

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