Ocean Variability & Acoustic Propagation

By John Potter

Session 1 Experimental results relating acoustic and oceanographic variability.- Deterministic-stochastic oceanographic descriptions for ocean-acoustic experiments.- Experimental ocean acoustic field moments versus predictions.- Two dimensional acoustical propagation in a stratified shear flow.- The effects of sound speed on the shape of the ocean impulse response.- The effect of seasonal temperature fluctuations in the water column on sediment compressional wave speed profiles in shallow water.- SLICE89: A single slice tomography experiment.- Marginal Ice Zone oceanographic variability and its effects on acoustic propagation.- Internal wave induced fluctuations in the oceanic density and sound speed fields.- Gyre-scale reciprocal acoustic transmissions.- Summary of Session 1.- Session 2 Wave motion and finestructure affecting acoustic propagation: smallscale variability.- Chaos in underwater acoustics.- Impulse response analysis of ocean acoustic propagation.- Dependence of near-surface acoustic scatter on wind speed.- Nonlinear effects in wind-wave generation.- Multichannel acoustic reflection profiling of ocean watermass temperature/salinity interfaces.- Acoustic variability due to internal waves and surface waves in shallow water.- Observations of ocean inhomogeneities.- The problem of creating a synthetic aperture in a non-isotropic ocean.- Prediction of coastal ocean thermal variability.- Summary of Session 2.- Session 5 Stochastic modelling in oceanography and acoustics.- Treatments of incoherent scattering for the parabolic equation and ASTRAL propagation models.- Average sound intensities in randomly varying sound-speed structures.- Stochastic ray tracing in thermoclines.- Modeling of sound propagation in a randomly varying ocean by stochastic mode coupling.- Summary of Session 5.- Session 3 Range-dependent acoustic propagation caused by fronts and eddies: mesoscale variability.- Radar altimetry and acoustic prediction.- A range-dependent analysis of acoustic transmission across a cold filament in the California current.- Acoustic effects of the Iceland-Faeroe front.- Deep hydrographic fluctuations in the north-east Atlantic Mediterranean outflow: influence on acoustic propagation.- Aspects of oceanographic variability observed from thermistor chains on free-drifting buoys.- Theoretical determination of the fractal dimension of fluid parcel trajectories in large and meso-scale flows.- How do eddies modify the stratification of the thermocline?.- Three-dimensional oceanography and acoustics.- Frontal boundaries and eddies on the Iceland-Faeroes ridge.- Upper ocean variability associated with fronts.- Summary of Session 3.- Session 4 Coupling acoustic and oceanographic models.- A mixed-layer model for predicting the acoustic structure of shallow seas.- The use of coupled ocean-acoustic models in the design of naval forecast systems.- The Environmental Acoustic Tactical Support System: low frequency mesoscale ocean feature environmental acoustic results.- Environmental focusing and source localization in the ocean.- Refraction of acoustic modes in very long-range transmissions.- Environmental sensitivity studies with an interfaced ocean-acoustics system.- Simulating temperature, salinity and currents in the ocean.- A numerical investigation of semi-diurnal fluctuations in acoustic intensity at a shelf edge.- Summary of Session 4.- List of Participants.- Author Index.

• Format: Hardcover
• Language: English
• ISBN: 0792310799
• ISBN13: 9780792310792
• Release Date: February 1991
• Publisher: Springer
• Length: 624 Pages
• Weight: 2.30 lbs.
• Dimensions: 1.3" x 6.1" x 9.2"