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Browsing Applied Ocean Physics and Engineering (AOP&E) by Title

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Browsing Applied Ocean Physics and Engineering (AOP&E) by Title

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  • Geyer, W. Rockwell; Lavery, Andone C.; Scully, Malcolm E.; Trowbridge, John H. (American Geophysical Union, 2010-11-25)
    Shear instability is the dominant mechanism for converting fluid motion to mixing in the stratified ocean and atmosphere. The transition to turbulence has been well characterized in laboratory settings and numerical ...
  • Ledwell, James R.; Duda, Timothy F.; Sundermeyer, Miles A.; Seim, Harvey E. (American Geophysical Union, 2004-10-26)
    Dye release experiments were performed together with microstructure profiling to compare the two methods of estimating diapycnal diffusivity during summer and fall stratification on the continental shelf south of New ...
  • MacDonald, Daniel G. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2003-02)
    This thesis utilizes field data from the Fraser River Estuary, a highly stratified system located in southwestern British Columbia, Canada, to investigate the nature of mixing processes in a highly stratified environment, ...
  • Udovydchenkov, Ilya A.; Brown, Michael G.; Duda, Timothy F.; Mercer, James A.; Andrew, Rex K.; Worcester, Peter F.; Dzieciuch, Matthew A.; Howe, Bruce M.; Colosi, John A. (Acoustical Society of America, 2012-06)
    The results of mode-processing measurements of broadband acoustic wavefields made in the fall of 2004 as part of the Long-Range Ocean Acoustic Propagation Experiment (LOAPEX) in the eastern North Pacific Ocean are reported ...
  • Sperry, Brian J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-05)
    During the 1991 Heard Island Feasibility Test, a vertical hydrophone array deployed off Monterey, CA, recorded transmissions from a low-frequency acoustic source nearly 18,000 km away. By determining the modal structure ...
  • Morozov, Andrey K.; Preisig, James C.; Papp, Joseph C. (Acoustical Society of America, 2008-09)
    Acoustical array data from the Shallow Water Acoustics experiment was processed to show the feasibility of broadband mode decomposition as a preprocessing method to reduce the effective channel delay spread and concentrate ...
  • Casey, Kevin D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-06)
    Two approaches to determining the ocean sound speed profile using measured acoustic modal eigenvalues are examined. Both methods use measured eigenvalues and mode dependent assumed values of the WKB phase integral as ...
  • Udovydchenkov, Ilya A.; Rypina, Irina I.; Brown, Michael G. (Acoustical Society of America, 2010-04-07)
    The discrete form of the mode filtering problem is considered. The relevant equations constitute a linear inverse problem. Solutions to problems of this type are subject to a well-known trade-off between resolution and ...
  • Noyes, T. James; Guza, R. T.; Feddersen, Falk; Elgar, Steve; Herbers, T. H. C. (American Geophysical Union, 2005-05-27)
    Observations of shear waves, alongshore propagating meanders of the mean alongshore current with periods of a few minutes and alongshore wavelengths of a few hundred meters, are compared with model predictions based on ...
  • Malmquist, Kenneth A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1992-09)
    The Deep Submergence Laboratory has developed a family of calibrated high frequency bathymetric sonar systems for underwater survey. It is useful to have a detailed mathematical description of these systems to assist in ...
  • DeRuiter, Stacy L.; Tyack, Peter L.; Lin, Ying-Tsong; Newhall, Arthur E.; Lynch, James F.; Miller, Patrick J. O. (Acoustical Society of America, 2006-12)
    In 2002 and 2003, tagged sperm whales (Physeter macrocephalus) were experimentally exposed to airgun pulses in the Gulf of Mexico, with the tags providing acoustic recordings at measured ranges and depths. Ray trace and ...
  • Jakuba, Michael V. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2003-02)
    The Sentry AUV represents a radical departure from conventional AUV design, particularly with respect to actuation. The vehicle's combined foil/thruster actuators have the potential to produce a vehicle both maneuverable ...
  • Severson, Jared (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-02)
    Marine mammal whistle calls present an attractive medium for covert underwater communications. High quality models of the whistle calls are needed in order to synthesize natural-sounding whistles with embedded information. ...
  • Udovydchenkov, Ilya A.; Duda, Timothy F.; Doney, Scott C.; Lima, Ivan D. (Acoustical Society of America, 2010-08-19)
    Possible future changes of ambient shipping noise at 0.1–1 kHz in the North Pacific caused by changing seawater chemistry conditions are analyzed with a simplified propagation model. Probable decreases of pH would cause ...
  • Li, Dan (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1997-09)
    Acoustic propagation in the ocean inevitably encounters inhomogeneities of various types, which give rise to scattering. Acoustic scattering from rough water /bottom interfaces comprised of exposed rocks and sea mountains ...
  • Duda, Timothy F.; Preisig, James C. (IEEE, 1999-01)
    Propagation of 400-Hz sound through continental-shelf internal solitary wave packets is shown by numerical simulation to be strongly influenced by coupling of normal modes. Coupling in a packet is controlled by the mode ...
  • Feddersen, Falk; Clark, David B.; Guza, R. T. (American Geophysical Union, 2011-11-18)
    A model that accurately simulates surf zone waves, mean currents, and low-frequency eddies is required to diagnose the mechanisms of surf zone tracer transport and dispersion. In this paper, a wave-resolving time-dependent ...
  • Clark, David B.; Feddersen, Falk; Guza, R. T. (American Geophysical Union, 2011-11-18)
    Five surf zone dye tracer releases from the HB06 experiment are simulated with a tracer advection diffusion model coupled to a Boussinesq surf zone model (funwaveC). Model tracer is transported and stirred by currents and ...
  • Proehl, Jeffrey A.; Lynch, Daniel R.; McGillicuddy, Dennis J.; Ledwell, James R. (2004-09-29)
    Circulation and transport at the North Flank of Georges Bank are studied using a data-assimilative 3-D model of frontal dynamics under stratified, tidally energetic conditions over steep topography. The circulation model ...
  • Duda, Timothy F. (IEEE, 1991-01)
    Numerical calculation of acoustic field perturbation expressions can be used to predict fluctuations after propagation through ocean sound-speed structures, but before the onset of multipath. The general form of the ...

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