Acoustic clutter from buried submarine mud volcanoes

Holland, Charles W.; Gerig, Anthony L.; Boni, Piero

doi:10.1007/978-1-4020-4386-4_9

Cited by 3 publications

(6 citation statements)

References 9 publications

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“…However, mud volcanoes are also demonstrated sources of clutter at longer ranges [2]. The geometric acoustics scattering model needs to be combined with established propagation models, and the results compared against long-range data before it can be used to predict or simulate clutter at longer ranges with any confidence.…”

Section: Resultsmentioning

confidence: 99%

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Seafloor Scattering in Shallow Water Environments

Gerig

Bradley²

2013

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Section: Resultsmentioning

confidence: 99%

“…They vary widely in size, can be exposed, proud, or buried, and are of interest to the Navy as sources of active sonar clutter [2]. The long-term goal of this work is to accurately model mud volcano scattering.…”

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Seafloor Scattering in Shallow Water Environments

Gerig

Bradley²

2013

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“…3 Reverberation data indicate strong scattering associated with some of the buried volcanoes at ranges of 10 km. 4 Accurate modeling of mud volcano scattering would make predicting and simulating scattering signatures for individual volcanoes possible, thus providing the information necessary to mitigate mud volcano clutter through improved sonar design and classification schemes. In addition, it would enhance the remote sensing of mud volcano geoacoustic properties, a valuable prospect for the geoscience communities, especially in regard to buried mud volcanoes.…”

Section: Introductionmentioning

confidence: 99%

“…Previous modeling from long-range reverberation at the buried mud volcano that will be the object of study here, indicates that the scattering was most likely due to the latter. 4 The purpose of this work was to develop a more refined scattering model specifically for the buried mud volcanoes observed on the Malta Plateau through the use of seismic reflection, bistatic scattering, and geoacoustic measurements taken during different sea trials from a single volcano and its immediate environment at close range. It takes a bottom-up approach that allows the features seen in measured data to guide understanding and model development.…”

Section: Introductionmentioning

confidence: 99%

Near-specular acoustic scattering from a buried submarine mud volcano

Gerig

Holland

2007

The Journal of the Acoustical Society of America

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Submarine mud volcanoes are objects that form on the seafloor due to the emission of gas and fluidized sediment from the Earth's interior. They vary widely in size, can be exposed or buried, and are of interest to the underwater acoustics community as potential sources of active sonar clutter. Coincident seismic reflection data and low frequency bistatic scattering data were gathered from one such buried mud volcano located in the Straits of Sicily. The bistatic data were generated using a pulsed piston source and a 64-element horizontal array, both towed over the top of the volcano. The purpose of this work was to appropriately model low frequency scattering from the volcano using the bistatic returns, seismic bathymetry, and knowledge of the general geoacoustic properties of the area's seabed to guide understanding and model development. Ray theory, with some approximations, was used to model acoustic propagation through overlying layers. Due to the volcano's size, scattering was modeled using geometric acoustics and a simple representation of volcano shape. Modeled bistatic data compared relatively well with experimental data, although some features remain unexplained. Results of an inversion for the volcano's reflection coefficient indicate that it may be acoustically softer than expected.

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Seafloor Scattering in Shallow-Water Environments

Gerig¹,

Bradley²

2006

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LONG-TERM GOALSMud volcanoes are solid objects that form on the seafloor due to the emission of gas and fluidized sediment from the earth's interior [1]. They vary widely in size, can be exposed, proud, or buried, and are of interest to the Navy as sources of active sonar clutter [2]. The long-term goal of this work is to accurately model mud volcano scattering. The final product will make predicting and simulating scattering signatures for individual volcanoes possible, and will provide the information necessary to mitigate mud volcano clutter through improved sonar design and classification schemes.The long-term goals of the seafloor scattering project are linked to both the forward and inverse scattering problems. The first objective is to model the time dependence of seafloor scattering based upon knowledge of the mechanisms responsible for benthic change, primarily bioturbation and sediment transport. The second is to develop acoustics as a tool for the remote sensing of benthic activity and the inversion of time-dependent seabed parameters that are used as inputs for reverberation models. Results should be of use to the Navy in understanding and predicting the time dependence of reverberation, as well as measuring the parameters necessary for reverberation models. OBJECTIVESThe objective of the current mud volcano project is to model low-frequency scattering from a volcano using a bottom-up approach. Coincident acoustic data, bathymetry, and geoacoustic measurements are used to guide understanding and model development. As a part of this process, physical features and processes that are significant contributors to observed mud volcano scattering are identified.Current seafloor scattering work is concerned solely with surface scattering (as opposed to volume scattering or a combination of the two), and aims to link changes in acoustic scattering with changes in the surface of the seafloor. This is achieved by deriving a first-order perturbation theory-based equation that connects the time correlation of scattered acoustic power with the time correlation of Report Documentation Page Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

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Acoustic clutter from buried submarine mud volcanoes

Cited by 3 publications

References 9 publications

Seafloor Scattering in Shallow Water Environments

Seafloor Scattering in Shallow Water Environments

Near-specular acoustic scattering from a buried submarine mud volcano

Seafloor Scattering in Shallow-Water Environments

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