High-resolution regional modeling to understand acoustic propagation in support of the NESM project
Abstract
Numerical simulations of the three-dimensional (3D) underwater sound field are helpful tools to investigate sound propagation effect,s in the ocean. Above sloped terrains and in areas characterized by strong temperature and salinity variations, the approximate simu,lation of the 3D sound-speed field requires models capable of resolving such variations. There have been several instances where the, effects of small-scale variability were essential to understanding the sound propagation problem (e.g. Dushaw and Sagen, 2017; Duda, et al., 2019), and this is likely to be the case at the New England Seamounts (NESM) region, where mesoscale and submesoscale circu,lations abound. Models routinely run for forecast or hindcast applications invariably have biases and resolution constraints, with i,mportant limitations in both the horizontal and vertical directions, and generally exclude features that can have strong effects on,acoustics, such as submesoscale fronts and eddies, and nonlinear internal waves (NIWs). Here we propose to investigate the role of s,mall-scale variability in shaping the 3D sound field around the NESM area ahead of and during the planned campaign. The goal of the,research is to address the significant influence that the variability at scales of ~ 1 km or less may have on the formation dynamics, and the acoustic signal propagation in the region of interest.Approved for Public Release
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Dec 06, 2022
- Source ID
- N000142312059
Entities
People
- Annalisa Bracco
Organizations
- Georgia Tech Research Corporation
- Office of Naval Research
- United States Navy