Three-Dimensional Canyon and Slope Acoustics
Abstract
Underwater sound propagation in the ocean can be affected by many environmental factors, including marine geological features, phys""ical oceanographic dynamics, boundary roughness, etc. The environmental factors considered in this proposal include (1) shelfbreak a""nd slopes, (2) submarine canyons, (3) three-dimensional sub-bottom with interface irregularity and roughness, (4) marginal ice zones"", (5) water column sound speed variability caused by internal waves, shelfbreak fronts, upwelling currents, and sub-mesoscale eddies"", and (6) surface waves. Due tothe presence of strong horizontal gradients in seafloor topography, sub-bottom layering and the inde""x of refraction in the water column, these marine geological and physical oceanographic features can produce strong 3-D sound propag"ation effects.The ocean acoustics research in this proposal is focused on three-dimensional (3D) seismoacoustic propagation in the" area of slopes and canyons. Theoretical, numerical and data analysesand field work studies will be conducted. The scientific object"ives are summarized in the following: (1) Study of 3-D sound propagation effects due to marine geological features and PO dynamic pr"ocesses; (2) Investigation of 3-D elastic wave effects in sediment, bottom and ice covers on underwater sound propagation; (3) Under""standing of 3-D scattering effects due to roughness and irregularity of sea surface, seafloor and sub-bottom interfaces; (4) Sensiti"vity analysis of competing environmental factors on 3-D underwater sound propagation; and (5) Verification of theoretical prediction"s and numerical modeling with field experiment data.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 07, 2017
- Source ID
- N000141712692
Entities
People
- Ying-Tsong Lin
Organizations
- Office of Naval Research
- United States Navy
- Woods Hole Oceanographic Institution