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Multiscale multiphysics data-informed modeling for three-dimensional ocean acoustic simulation and prediction
Name
1.5126012.pdf
Description
Published version
Size
8.35 MB
Format
Adobe PDF
Checksum (MD5)
3018d30aff2d41a9e6e0914ae69a1422
Author(s)
Duda, Timothy F
Lin, Ying-Tsong
Newhall, Arthur E
Helfrich, Karl R
Lynch, James F
Zhang, Weifeng Gordon
Lermusiaux, Pierre FJ
Wilkin, John
Date Issued
2019
Journal
The Journal of the Acoustical Society of America
Publisher
Acoustical Society of America (ASA)
Version
Final published version
Abstract
© 2019 Acoustical Society of America. Three-dimensional (3D) underwater sound field computations have been used for a few decades to understand sound propagation effects above sloped seabeds and in areas with strong 3D temperature and salinity variations. For an approximate simulation of effects in nature, the necessary 3D sound-speed field can be made from snapshots of temperature and salinity from an operational data-driven regional ocean model. However, these models invariably have resolution constraints and physics approximations that exclude features that can have strong effects on acoustics, example features being strong submesoscale fronts and nonhydrostatic nonlinear internal waves (NNIWs). Here, work to predict NNIW fields to improve 3D acoustic forecasts using an NNIW model nested in a tide-inclusive data-assimilating regional model is reported. The work was initiated under the Integrated Ocean Dynamics and Acoustics project. The project investigated ocean dynamical processes that affect important details of sound-propagation, with a focus on those with strong intermittency (high kurtosis) that are challenging to predict deterministically. Strong internal tides and NNIW are two such phenomena, with the former being precursors to NNIW, often feeding energy to them. Successful aspects of the modeling are reported along with weaknesses and unresolved issues identified in the course of the work.
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
10.1121/1.5126012
