Three dimensional parabolic equation modeling of an internal wave event during Shallow Water 2006.

摘要: During the Shallow Water 2006 (SW06) experiment, a J‐15 acoustic source deployed from Research Vessel Sharp transmitted broadband (100–500 Hz) chirp signals 15 km away vertical line array. The array was intentionally positioned near shelf‐break front and in an area where internal waves are known to occur. same time wave, “Event 44,” passed through sound field such that wave parallel transmission path. Measured data show substantial intensity fluctuations vary over space due complex multimode multipath (both two three dimensional) interference patterns. Of specific interest of measured preceding wave’s arrival. Additionally, depth variability intensities can be attributed warm water intrusion coinciding with event. This presentation shows recent modeling results using experimental geometry, signal parameters, simulated oceanographic environment based on environmental moorings ship‐born sensors. A new version three‐dimensional Monterey–Miami parabolic equation code, which incorporates user‐defined speed field, is used. [Work sponsored by Office Naval Research.]