Internal Wave Contributions to Ocean Remote Sensing by Acoustic ScintillationAnalysis

摘要

Previous theoretical developments describing the use of acoustic scintillationanalysis for the measurement of currents and microscale variability along horizontal acoustic paths required that Taylor's frozen-flow hypothesis be satisfied. Refractive irregularities were assumed to be passive tracers that were simply advected by the mean flow across the propagation path. This requirement restricted the application of the scintillation technique to well-mixed turbulent flows. Two propagation geometries were considered in detail. The most simple comprised a single transmitter and two spaced-receivers. The configuration allowed the retrieval of the path-integrated transverse current and microscale variability as characterized by the refractive index structure. The authors extend the earlier theories to include internal wave contributions to the scintillation signal.