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Underwater acoustic propagation model to simulate seismic oceanography experiments

AuthorsKormann, Jean ; Cobo, Pedro; Ranz Guerra, Carlos
KeywordsSeismic 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 DateJul-2007
PublisherInternational Institute of Acoustics and Vibration
Citation14th International Congress in Sound and Vibration (ICSV14), S-Underwater and ship acoustics
AbstractSeismic 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.
DescriptionCommunication 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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