In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 129, No. 4_Supplement ( 2011-04-01), p. 2509-2509
Abstract:
The value of acoustic propagation modeling using water-column sound-speed fields from computational physical oceanographic models is well established. With a proper investment in measurements and models it is now possible to make predictions of real-time and future acoustic effects of mesoscale eddies and other structures. This capability depends on properly incorporating data from satellite and in situ instruments into data-assimilative models. Many challenges remain, however. First, mesoscale feature uncertainties are high when data are scarce. Second, models do not fully handle gravity waves (internal and surface) and submesoscale features. The present utility of models is high despite these remaining challenges. For example, models running open-loop or with partial boundary condition and internal constraints will generate realistic fields for acoustics studies that have goals other than sound-field prediction. Recent analyzes of the sound propagation effects, at 50–1000 Hz, of internal waves, fronts, and canyons show that realism can improve studies of transmission loss uncertainty and fluctuation characteristics. As examples, internal-wave curvature affects acoustic beam generation and horizontal interference patterns, and internal-tide amplitude and direction affect shallow-water acoustic mode wavenumbers and attenuation parameters. Acoustic fluctuation effects computed with three-dimensional (3D) acoustic modeling through internal-wave permitting ocean models will be presented.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
2011
detail.hit.zdb_id:
1461063-2
Permalink
