Now showing items 4085-4104 of 7131

  • A model for energetics and bioaccumulation in marine mammals with applications to the right whale 

    Klanjscek, Tin; Nisbet, Roger M.; Caswell, Hal; Neubert, Michael G. (Ecological Society of America, 2007-12)
    We present a dynamic energy budget (DEB) model for marine mammals, coupled with a pharmacokinetic model of a lipophilic persistent toxicant. Inputs to the model are energy availability and lipid-normalized toxicant ...
  • A model for large-amplitude internal solitary waves with trapped cores 

    Helfrich, Karl R.; White, Brian L. (Copernicus Publications on behalf of the European Geosciences Union and the American Geophysical Union, 2010-07-15)
    Large-amplitude internal solitary waves in continuously stratified systems can be found by solution of the Dubreil-Jacotin-Long (DJL) equation. For finite ambient density gradients at the surface (bottom) for waves of ...
  • A model for uranium, rhenium, and molybdenum diagenesis in marine sediments based on results from coastal locations 

    Morford, Jennifer L.; Martin, William R.; Francois, Roger; Carney, Caitlin M. (2008-12-31)
    The purpose of this research is to characterize the mobilization and immobilization processes that control the authigenic accumulation of uranium (U), rhenium (Re) and molybdenum (Mo) in marine sediments. We analyzed ...
  • Model initialization in a tidally energetic regime : a dynamically adjusted objective analysis 

    Aretxabaleta, Alfredo L.; Smith, Keston W.; McGillicuddy, Dennis J.; Ballabrera-Poy, Joaquim (2011-01-24)
    A simple improvement to objective analysis of hydrographic data is proposed to eliminate spatial aliasing e ects in tidally energetic regions. The proposed method consists of the evaluation of anomalies from observations ...
  • A model of a Mediterranean salt lens in external shear 

    Walsh, David (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1992-04)
    A pair of simple models representing the interaction of a continuously stratified f-plane quasigeostrophic lens with a uniform external shear flow is examined. The study is motivated by the desire to understand the ...
  • A model of multiple zonal jets in the oceans : dynamical and kinematical analysis 

    Berloff, Pavel S.; Kamenkovich, Igor V.; Pedlosky, Joseph (American Meteorological Society, 2009-11)
    Multiple alternating zonal jets observed in the ocean are studied with an idealized quasigeostrophic zonal-channel model, with the supercritical, zonal background flow imposed. Both eastward and westward background flows ...
  • Model of PAH and PCB bioaccumulation in Mya arenaria and application for site assessment in conjunction with sediment quality screening criteria 

    Levine, Rachel H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-06)
    A review of six methods for deriving sediment quality criteria SQC was conducted. Each approach was analyzed according to cost, difficulty, applicability and reliability. Results of this analysis led to the recommendation ...
  • A model of the Arctic Ocean carbon cycle 

    Manizza, Manfredi; Follows, Michael J.; Dutkiewicz, Stephanie; Menemenlis, Dimitris; McClelland, James W.; Hill, C. N.; Peterson, Bruce J.; Key, Robert M. (American Geophysical Union, 2011-12-15)
    A three dimensional model of Arctic Ocean circulation and mixing, with a horizontal resolution of 18 km, is overlain by a biogeochemical model resolving the physical, chemical and biological transport and transformations ...
  • A model of the equatorial deep jets and the role of the horizontal Coriolis parameter 

    Zhang, Xiaoming (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1991-01)
    This thesis reviews observational and theoretical work on the equatorial deep jets and work related to the study of the role of the horizontal Coriolis parameter. Most existing analytical models interpret the equatorial ...
  • Model simulations of the Bay of Fundy Gyre : 1. Climatological results 

    Aretxabaleta, Alfredo L.; McGillicuddy, Dennis J.; Smith, Keston W.; Lynch, Daniel R. (American Geophysical Union, 2008-10-29)
    The characteristics of a persistent gyre in the mouth of the Bay of Fundy are studied using model simulations. A set of climatological runs are conducted to evaluate the relative importance of the different forcing mechanisms ...
  • 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 ...
  • A model-dye comparison experiment in the tidal mixing front zone on the southern flank of Georges Bank 

    Chen, Changsheng; Xu, Qichun; Houghton, Robert; Beardsley, Robert C. (American Geophysical Union, 2008-02-09)
    A process-oriented model-dye comparison experiment was conducted to examine the ability of a numerical ocean model to simulate the observed movement of dye across the tidal mixing front on the southern flank of Georges ...
  • 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 convection in the Greenland Sea 

    Bhushan, Vikas (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-09)
    A detailed examination of the development of a deep convection event observed in the Greenland Sea in 1988-89 is carried out through a combination of modeling, scale estimates, and data analysis. We develop a prognostic ...