IODA Project Homepage

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Plan view of depth-averaged intensity of 200-Hz sound passing through curved internal waves in shallow water, computed with Cartesian 3D parabolic equation model. (Y-T Lin)

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3D nonhydrostatic simulation of internal tides and nonlinear internal waves generated by via conversion of barotropic tidal energy at idealized canyon bathymetry. (Weifeng Zhang)

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Simulated Mode-1 internal wave amplitudes at the SW06 experiment site. MSEAS primitive equation model reanalysys fields are used to generate internal tide rays in the mesoscale background, along which the extended rotaion modified Korteweg de Vries wave equation is solved, with wave initial conditions also taken from the MSEAS model field (IODA Hybrid Model Group)

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Cross- and along-shelf sections of internal wave kinetic dnergy density from the ROMS control simulation of internal tides generated in a canyon. Figure 5 of the journal article. (Zhang, Duda and Udovydchenkov, JPO, 2014)

Project Overview

Long Term Goal: IODA is an integrated ocean fluid physics and acoustics study with the goal of creating a broadly applicable and portable continental shelf-area acoustic prediction capability that includes the effects of internal and surface gravity waves as well as effects of subtidal large-scale processes.

Objective: The objective is to improve ocean physical state and acoustic state predictive capability. Specific short-term project objectives are the completion of targeted studies of the relevant oceanographic processes, acoustic propagation processes, and acoustic scattering processes, plus the development of improved computational tools for the physical regimes identified to be important.

The motivation for the project is that regional environmental modeling and acoustic or sonar modeling can occur in disconnected fashion. If the environmental models are optimized for other purposes, they may not provide environmental inputs that are essential to predictive acoustic models. Research into what the relevant environmental factors are, and how to best model them, and how to pass the information to acoustic models are important thrusts of the project.


University of Texas at Austin
Rutgers University
Massachusetts Institute of Technology
University of Delaware
Rennselaer Polytechnic Institute
Colorado School of Mines
Naval Postgraduate School
Florida Institute of Technology

Grant information

This grant was awarded in MURI TOPIC # 6, "Integrated Oceanographic, Atmospheric, and Acoustic Physics", in Office of Naval Research BAA 10-026


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Last updated December 21, 2017
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