Now showing items 560-579 of 980

    • Model simulations of the Bay of Fundy Gyre : 2. Hindcasts for 2005–2007 reveal interannual variability in retentiveness 

      Aretxabaleta, Alfredo L.; McGillicuddy, Dennis J.; Smith, Keston W.; Manning, James P.; Lynch, Daniel R. (American Geophysical Union, 2009-09-03)
      A persistent gyre at the mouth of the Bay of Fundy results from a combination of tidal rectification and buoyancy forcing. Here we assess recent interannual variability in the strength of the gyre using data assimilative ...
    • Model-data comparisons of shear waves in the nearshore 

      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 ...
    • Modeled alongshore circulation and force balances onshore of a submarine canyon 

      Hansen, Jeff E.; Raubenheimer, Britt; List, Jeffrey H.; Elgar, Steve (John Wiley & Sons, 2015-03-23)
      Alongshore force balances, including the role of nonlinear advection, in the shoaling and surf zones onshore of a submarine canyon are investigated using a numerical modeling system (Delft3D/SWAN). The model is calibrated ...
    • Modeling a 300 kHz bathymetric sonar system 

      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 ...
    • Modeling acoustic propagation of airgun array pulses recorded on tagged sperm whales (Physeter macrocephalus) 

      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 ...
    • Modeling and analysis of internal-tide generation and beamlike onshore propagation in the vicinity of shelfbreak canyons 

      Zhang, Weifeng G.; Duda, Timothy F.; Udovydchenkov, Ilya A. (American Meteorological Society, 2014-03)
      A hydrostatic numerical model with alongshore-uniform barotropic M2 tidal boundary forcing and idealized shelfbreak canyon bathymetries is used to study internal-tide generation and onshore propagation. A control simulation ...
    • Modeling and control of an autonomous underwater vehicle with combined foil/thruster actuators 

      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 ...
    • Modeling and frequency tracking of marine mammal whistle calls 

      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. ...
    • Modeling curiosity in a mobile robot for long-term autonomous exploration and monitoring 

      Girdhar, Yogesh; Dudek, Gregory (2015-09)
      This paper presents a novel approach to modeling curiosity in a mobile robot, which is useful for monitoring and adaptive data collection tasks, especially in the context of long term autonomous missions where pre- programmed ...
    • Modeling deep ocean shipping noise in varying acidity conditions 

      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 ...
    • Modeling of monostatic bottom backscattering from three-dimensional volume inhomogeneities and comparisons with experimental data 

      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 ...
    • A modeling study of acoustic propagation through moving shallow-water solitary wave packets 

      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 ...
    • Modeling surf zone tracer plumes : 1. Waves, mean currents, and low-frequency eddies 

      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 ...
    • Modeling surf zone tracer plumes : 2. Transport and dispersion 

      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 ...
    • Modeling turbulent dispersion on the North Flank of Georges Bank using Lagrangian Particle Methods 

      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 ...
    • Modeling weak fluctuations of undersea telemetry signals 

      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 ...
    • Modeling wind forcing in phase resolving simulation of nonlinear wind waves 

      Kalmikov, Alexander G. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-02)
      Wind waves in the ocean are a product of complex interaction of turbulent air flow with gravity driven water surface. The coupling is strong and the waves are non-stationary, irregular and highly nonlinear, which restricts ...
    • Modelling bottom stress in depth-averaged flows 

      Jenter, Harry L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1989-05)
      The relationship between depth-averaged velocity and bottom stress for wind-driven flow in unstratified coastal waters is examined here. The adequacy of traditional linear and quadratic drag laws is addressed by comparison ...
    • Models : tools for synthesis in international oceanographic research programs 

      McGillicuddy, Dennis J.; deYoung, Brad; Doney, Scott C.; Glibert, Patricia M.; Stammer, Detlef; Werner, Francisco E. (Oceanography Society, 2010-09)
      Through its promotion of coordinated international research programs, the Intergovernmental Oceanographic Commission (IOC) has facilitated major progress on some of the most challenging problems in oceanography. Issues ...
    • Models of harmful algal blooms : conceptual, empirical, and numerical approaches 

      McGillicuddy, Dennis J. (2010-12-08)
      Now is an historic time in the field of harmful algal bloom (HAB) science. HAB problems are growing worldwide, and society’s need for understanding these phenomena is more pressing than ever. Technological advances have ...