Accession Number : ADA313861

Title :   Observations and Characterizations of Non-Linear Internal Waves on the Mid-Atlantic Bight Continental Shelf.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Taube, Donald W.

PDF Url : ADA313861

Report Date : JUN 1996

Pagination or Media Count : 64

Abstract : During the summer of 1995, an intensive, joint field study called Shallow Water Acoustics in a Random Medium (SWARM 95) was conducted by the Naval Research Laboratories (NRL), Woods Hole Oceanographic Institution (WHOI), University of Delaware (UD), Applied Physics Laboratory of Johns Hopkins University (APL/JHU) and Naval Postgraduate School (NPS), among others, in the Mid-Atlantic Bight continental shelf region off the coast of New Jersey. Environmental and acoustic sensors were deployed as part of SWARM '95 to measure and characterize the non-linear internal waves and their impact on the spatial and temporal coherence of the acoustic transmissions. As part of the environmental monitoring network, two bottom-moored, upward looking Acoustic Doppler Current Profilers (ADCPs) were deployed. A modal, time-series analysis of the data captured by the two ADCPs was performed. Highlights of the results reveal that: the generation mechanism, in this case, is consistent with the lee-wave hypothesis of generation; the phase speed is in good agreement with predicted phase speeds of the first baroclinic mode; and, the displacement power spectral density is significantly modified when soliton wavepackets are present.

Descriptors :   *CONTINENTAL SHELVES, *INTERNAL WAVES, *ACOUSTIC DETECTORS, COASTAL REGIONS, OCEAN WAVES, OCEAN CURRENTS, ACOUSTIC WAVES, TIME SERIES ANALYSIS, THESES, POWER SPECTRA, SHALLOW WATER, BATHYMETRY, TIDAL CURRENTS, SOUND TRANSMISSION, ACOUSTIC MEASUREMENT, NAVAL OPERATIONS, ATLANTIC OCEAN, UNDERWATER ACOUSTICS, OCEAN MODELS, ACOUSTIC DATA, SOLITONS, OCEAN TIDES.

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE