K. D. Heaney
W. A. Kuperman
Marine Phys. Lab., Scripps Inst. of Oceanog., La Jolla, CA 92093-0238
An interpolation method that increases the speed of broadband
range-dependent calculations by an order of magnitude using the parabolic
equation has been developed. By decomposing the vertical field into complex
modal amplitudes, interpolation across frequency is possible. The method was
designed to be used in Monte-Carlo studies of the effects of internal waves.
Signal processing algorithms are being developed to extract the deterministic
signal from the internal wave noise. The method has been benchmarked against
the fully broadband PE for several ocean environments. The results are in good
agreement with the PE for 1000-km propagation through internal waves and for
3000-km mildly varying ocean environments. The reproduction of the internal
wave effects in the SLICE89 experiment reported by Colosi [Colosi et al.,