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- W2023680068 abstract "The validity of the adiabatic approximation for modal propagation at low frequencies and over long megameter ranges is evaluated. A dynamical ocean model for the sound speed profile perturbations is superimposed upon a canonical Munk profile to represent a range-dependent ocean. The channel is excited with a single mode and propagated with the Collin’s FEPE code which was tuned to conserve the energy in each mode in a range-independent ocean. Modal amplitudes were determined by projecting the field on the local range-dependent modes. If one uses displacements which correspond to nominal experimental levels in the Atlantic, mode coherence is maintained only for ranges less than 1 megameter at 75 Hz; the energy appears to approach equipartitioning. Results starting with mode 1 and mode 10 were qualitatively the same. If the displacements are reduced by a factor of three, possibly more representative of Pacific levels, modal coherence is maintained for more than four megameters." @default.
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- W2023680068 date "1998-05-01" @default.
- W2023680068 modified "2023-09-24" @default.
- W2023680068 title "Modal leakage in range‐dependent oceans" @default.
- W2023680068 doi "https://doi.org/10.1121/1.422811" @default.
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