Observational analysis extends sound speed profiles using altimetry-informed methods during NESMA 2023, suggesting improved accuracy for ocean property modeling.
During the New England Seamount Acoustics (NESMA) 2023 experiment, the majority of temperature and salinity measurements from fixed moorings did not reach the surface due to a mooring blowdown caused by the Gulf Stream. To provide a statistical model of upper ocean properties, NESMA 2023 mooring measurements are extended to the surface using the altimetry-informed gravest empirical mode. The altimetry-informed gravest empirical mode is a tool that allows for the determination of interior, three-dimensional water column profiles from surface measurements of sea surface height, as well as the depth-dependent uncertainties of these properties. Sound propagation models based on the parabolic equation method will be implemented using the augmented sound speed profiles. Outputs from the acoustic models will be compared with sound propagation measurements to evaluate the accuracy of the sound speed profile augmentation. [Work supported by the Office of Naval Research.]
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