Now showing items 3149-3168 of 5608

    • Modeling sea surface scattering by the time-domain finite-difference method 

      Stephen, Ralph A. (Acoustical Society of America, 1996-10)
      A numerical scattering chamber based on the time-domain finite-difference solution of the two-way elastic wave equation is applied to a sea surface scattering problem, and excellent agreement is obtained in amplitude and ...
    • Modeling seafloor geoacoustic interaction with a numerical scattering chamber 

      Stephen, Ralph A.; Swift, Stephen A. (Acoustical Society of America, 1994-08)
      A numerical scattering chamber (NSC) has been developed to compute backscatter functions for geologically realistic seafloor models. In the NSC, solutions are computed to the elastic (or anelastic) wave equation by the ...
    • 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 ...
    • A modeling study of the seasonal oxygen budget of the global ocean 

      Jin, X.; Najjar, Raymond G.; Louanchi, F.; Doney, Scott C. (American Geophysical Union, 2007-05-09)
      An ecosystem model embedded in a global ocean general circulation model is used to quantify roles of biological and physical processes on seasonal oxygen variations. We find that the thermally induced seasonal net outgassing ...
    • 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 the global ocean iron cycle 

      Parekh, Payal; Follows, Michael J.; Boyle, Edward A. (American Geophysical Union, 2004-01-07)
      We describe a model of the ocean transport and biogeochemical cycling of iron and the subsequent control on export production and macronutrient distributions. Ocean transport of phosphorus and iron are represented by a ...
    • Modeling the impact of declining sea ice on the Arctic marine planktonic ecosystem 

      Zhang, Jinlun; Spitz, Yvette H.; Steele, Michael; Ashjian, Carin J.; Campbell, Robert G.; Berline, Leo; Matrai, Patricia (American Geophysical Union, 2010-10-08)
      We have developed a coupled 3-D pan-Arctic biology/sea ice/ocean model to investigate the impact of declining Arctic sea ice on the marine planktonic ecosystem over 1988–2007. The biophysical model results agree with ...
    • Modeling the processes affecting larval haddock (Melanogrammus aeglefinus) survival on Georges Bank 

      Petrik, Colleen M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-02)
      The ultimate goal of early life studies of fish over the past century has been to better understand recruitment variability. Recruitment is the single most important natural event controlling year-class strength and ...
    • Modeling the Total Allowable Area for Coastal Reclamation : a case study of Xiamen, China 

      Peng, Benrong; Lin, Chenchen; Jin, Di; Rao, Huanhuan; Jiang, Yuwu; Liuc, Yan (2013-03)
      This paper presents an analytical framework to estimate the Total Allowable Area for Coastal Reclamation (TAACR) to provide scientific support for the implementation of a coastal reclamation restriction mechanism. The logic ...
    • 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 ...
    • Modeling winter circulation under landfast ice : the interaction of winds with landfast ice 

      Kasper, Jeremy L.; Weingartner, Thomas J. (American Geophysical Union, 2012-04-04)
      Idealized models and a simple vertically averaged vorticity equation illustrate the effects of an upwelling favorable wind and a spatially variable landfast ice cover on the circulation beneath landfast ice. For the case ...
    • 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 ...
    • Modelling ecology from logic 

      Hulburt, Edward M. (2007-10-10)
      The thesis of this essay is that logically valid formulations guarantee correct and coherent summaries of scientific data. Several studies are presented that can be shown to be inadequate or simply wrong by logical procedures. ...
    • Modelling interactions of acid–base balance and respiratory status in the toxicity of metal mixtures in the American oyster Crassostrea virginica 

      Macey, Brett M.; Jenny, Matthew J.; Williams, Heidi R.; Thibodeaux, Lindy K.; Beal, Marion; Almeida, Jonas S.; Cunningham, Charles; Mancia, Annalaura; Warr, Gregory W.; Burge, Erin J.; Holland, A. Fredrick; Gross, Paul S.; Hikima, Sonomi; Burnett, Karen G.; Burnett, Louis; Chapman, Robert W. (2009-11-12)
      Heavy metals, such as copper, zinc and cadmium, represent some of the most common and serious pollutants in coastal estuaries. In the present study, we used a combination of linear and artificial neural network (ANN) ...
    • 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 ...
    • Models of hydrothermal circulation within 106 Ma seafloor : constraints on the vigor of fluid circulation and crustal properties, below the Madeira Abyssal Plain 

      Fisher, Andrew T.; von Herzen, Richard P. (American Geophysical Union, 2005-11-04)
      Heat flow measurements colocated with seismic data across 106 Ma seafloor of the Madeira Abyssal Plain (MAP) reveal variations in seafloor heat flow of ±10–20% that are positively correlated with basement relief buried ...