Dynamically-Orthogonal Parabolic Equations for Probabilistic Ocean Acoustics in the New England Seamounts

Underwater sound propagation is sensitive to specific environmental features and specific operational configuration parameters. We illustrate the preliminary use of our deterministic and stochastic Dynamically-Orthogonal Wide-Angle Parabolic Equations (DO-WAPEs) to classify and quantify the effects of ocean uncertainties and source depth uncertainties on the acoustic fields. We showcase initial results for the New England Seamounts off the northeastern US coastline, emphasizing the effects of uncertain source depths and subsurface ocean inflows and acoustic ducts. The stochastic DO-WAPEs predict the probability distribution of the acoustic pressure and transmission loss fields. The mean and standard deviation of the TL field are described and linked to the ocean environment and seamount geometry. Mutual information is predicted to identify the TL locations most informative about the source depth.