Now showing items 610-629 of 1163

  • Mixing and general circulation dynamics : theory and observations 

    Tziperman, Eli (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-02)
    This thesis studies the role of cross-isopycnal mixing in general circulation dynamics, from both the theoretical and observational points of view. The first two chapters discuss some theoretical aspects of cross-isopycnal ...
  • Mixing at the head of a canyon : a laboratory investigation of fluid exchanges in a rotating, stratified basin 

    Wells, Judith R.; Helfrich, Karl R. (American Geophysical Union, 2006-12-05)
    Observations indicate that oceanic mixing is intensified near the head of submarine canyons. How the presence of canyon walls affects the local production and distribution of mixed fluid is an open question. These dynamics ...
  • Mixing in a density-driven current flowing down a slope in a rotating fluid 

    Cenedese, Claudia; Adduce, Claudia (Cambridge University Press, 2008-05-14)
    We discuss laboratory experiments investigating mixing in a density-driven current flowing down a sloping bottom, in a rotating homogenous fluid. A systematic study spanning a wide range of Froude, 0.8 < Fr < 10, and ...
  • Mixing in the North Atlantic Tracer Release Experiment : observations and numerical simulations of Lagrangian particles and passive tracer 

    Sundermeyer, Miles A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1995-09)
    Mixing and stirring of passive tracer and Lagrangian particles in the open ocean was studied through comparison of observations from the North Atlantic Tracer Release Experiment, a numerical model, and existing theory. ...
  • Mixing variability in the Southern Ocean 

    Meyer, Amelie; Sloyan, Bernadette M.; Polzin, Kurt L.; Phillips, Helen E.; Bindoff, Nathaniel L. (American Meteorological Society, 2015-04)
    A key remaining challenge in oceanography is the understanding and parameterization of small-scale mixing. Evidence suggests that topographic features play a significant role in enhancing mixing in the Southern Ocean. This ...
  • Mode 2 waves on the continental shelf : ephemeral components of the nonlinear internal wavefield 

    Shroyer, Emily L.; Moum, James N.; Nash, Jonathan D. (American Geophysical Union, 2010-07-02)
    Shoreward propagating, mode 2 nonlinear waves appear sporadically in mooring records obtained off the coast of New Jersey in the summer of 2006. Individual mode 2 packets were tracked between two moorings separated by 1 ...
  • Mode filters and energy conservation 

    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 ...
  • 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 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • The modification of bottom boundary layer turbulence and mixing by internal waves shoaling on a barrier reef 

    Davis, Kristen A.; Monismith, Stephen G. (American Meteorological Society, 2011-11-01)
    Results are presented from an observational study of stratified, turbulent flow in the bottom boundary layer on the outer southeast Florida shelf. Measurements of momentum and heat fluxes were made using an array of acoustic ...
  • Modification of turbulent dissipation rates by a deep Southern Ocean eddy 

    Sheen, Katy L.; Brearley, J. Alexander; Naveira Garabato, Alberto C.; Smeed, David A.; St. Laurent, Louis C.; Meredith, Michael P.; Thurnherr, Andreas M.; Waterman, Stephanie N. (John Wiley & Sons, 2015-05-07)
    The impact of a mesoscale eddy on the magnitude and spatial distribution of diapycnal ocean mixing is investigated using a set of hydrographic and microstructure measurements collected in the Southern Ocean. These data ...
  • A modified atmospheric non-hydrostatic model on low aspect ratio grids 

    Sun, Wen-Yih; Sun, Oliver M. T.; Tsuboki, Kazuhisa (International Meteorological Institute, 2012-04-17)
    It is popular to use a horizontal explicit and a vertical implicit (HE-VI) scheme in the compressible nonhydrostatic (NH) model. However, when the aspect ratio becomes small, a small time-interval is required in HE-VI, ...
  • A modified atmospheric non-hydrostatic model on low aspect ratio grids : part II 

    Sun, Wen-Yih; Sun, Oliver M. T.; Tsuboki, Kazuhisa (International Meteorological Institute, 2013-06-28)
    Sun et al. (2012) proposed a modified non-hydrostatic model (MNH), in which the left-hand side of the continuity equation is multiplied by a parameter δ(4 ≤ δ≤16 in the article) to suppress high-frequency acoustic waves. ...
  • A modified beam-to-earth transformation to measure short-wavelength internal waves with an acoustic Doppler current profiler 

    Scotti, Alberto; Butman, Bradford; Beardsley, Robert C.; Alexander, P. Soupy; Anderson, Steven P. (American Meteorological Society, 2005-05)
    The algorithm used to transform velocity signals from beam coordinates to earth coordinates in an acoustic Doppler current profiler (ADCP) relies on the assumption that the currents are uniform over the horizontal distance ...
  • A modified leapfrog scheme for shallow water equations 

    Sun, Wen-Yih; Sun, Oliver M. T. (2011-01-25)
    In the 1D linearized shallow water equations, the Courant number should be < 0.5 for stability in the original Leapfrog (LF) scheme. Here, we propose using the time-averaged heights in the pressure gradient force in the ...