Now showing items 1-20 of 83

  • A 2 1/2 dimensional thermohaline circulation model with boundary mixing 

    Ru, Hua (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2000-04)
    A simple quasi-two dimensional dynamical model of Thermohaline circulation (THC) is developed, assuming that the mixing only occurs near western and eastern boundary layers. When the surface density is prescribed, the ...
  • Acoustic travel time perturbations due to an internal tide and internal wave field in the Barents Sea 

    Ray, Douglas S. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1993-08)
    Travel time perturbations of adiabatic normal modes due to an internal tide and internal mode field in the Barents Sea are examined. A formalism for the travel time perturbation due to a change in sound speed is presented. ...
  • Adaptive error estimation in linearized ocean general circulation models 

    Chechelnitsky, Michael Y. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-06)
    Data assimilation methods, such as the Kalman filter, are routinely used in oceanography. The statistics of the model and measurement errors need to be specified a priori. In this study we address the problem of estimating ...
  • Application of an inverse model in the community modeling effort results 

    Zhang, Huai-Min (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1995-02)
    Inverse modeling activities in oceanography have recently been intensified, aided by the oncoming observational data stream of WOCE and the advance of computer power. However, interpretations of inverse model results ...
  • Arctic Ocean circulation in an idealized numerical model 

    Sugimura, Peter Joseph (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2008-09)
    The mid-to-deep Arctic Ocean is generally characterized by a cyclonic circulation, contained along shelves and ridges. Here we analyze the general Arctic circulation using an idealized numerical model consisting of a ...
  • Atlantic Ocean circulation at the Last Glacial Maximum : inferences from data and models 

    Dail, Holly J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-09)
    This thesis focuses on ocean circulation and atmospheric forcing in the Atlantic Ocean at the Last Glacial Maximum (LGM, 18-21 thousand years before present). Relative to the pre-industrial climate, LGM atmospheric CO2 ...
  • Baroclinic vortices over a sloping bottom 

    LaCasce, Joseph H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-09)
    Nonlinear quasigeostrophic flows in two layers over a topographic slope are considered. The evolution depends on the size of two parameters which indicate the degree of nonlinearity at depth. The first measures the ...
  • Bottom currents and abyssal sedimentation processes south of Iceland 

    Shor, Alexander N. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1979-10)
    An investigation was carried out to observe the geologic effects of steady bottom currents on sediments of East Katla Ridge on the southern insular rise of Iceland. Near-bottom southwest to west-flowing currents exceeded ...
  • Buoyancy-driven circulation in the Red Sea 

    Zhai, Ping (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2014-09)
    This thesis explores the buoyancy-driven circulation in the Red Sea, using a combination of observations, as well as numerical modeling and analytical method. The first part of the thesis investigates the formation ...
  • Circulation and convection in the Irminger Sea 

    Våge, Kjetil (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-02)
    Aspects of the circulation and convection in the Irminger Sea are investigated using a variety of in-situ, satellite, and atmospheric reanalysis products. Westerly Greenland tip jet events are intense, small-scale wind ...
  • Circulations and water mass balances in the Brazil Basin 

    Zhang, Huai-Min (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1991-09)
    Based on the Levitus atlas, we find that the application of the Montgomery streamfunction to the isopycnal surfaces induces an error which can not be ignored in some regions in the ocean. The error arises from the sloping ...
  • Collinear analysis of altimeter data in the Bering Sea 

    Barber, Deborah K. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1989-09)
    Eighteen months of sea surface height data from the GEOSAT altimeter along collinear subtracks were analyzed for information on the circulation pattern in the Bering Sea. Seventy subtracks from both ascending and descending ...
  • Constraining the North Atlantic circulation with transient tracer observations 

    Li, Xingwen (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2003-02)
    The capability of transient tracers to constrain the ocean circulation in the North Atlantic is explored. Study of an idealized tracer shows that inferences of circulation properties from transient state distributions ...
  • Cooling and internal waves on the Continental Shelf 

    Pringle, James M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-06)
    The evolution of a coastal ocean undergoing uniform surface heat loss is examined. The dynamics of this ocean are initially modulated by the intense vertical mixing driven by surface cooling. The strong vertical mixing ...
  • Cross-shelf circulation and momentum and heat balances over the inner continental shelf near Martha's Vineyard, Massachusetts 

    Fewings, Melanie R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2007-09)
    The water circulation and evolution of water temperature over the inner continental shelf are investigated using observations of water velocity, temperature, density, and bottom pressure; surface gravity waves; wind ...
  • The dynamic role of ridges in a β-plane channel : towards understanding the dynamics of large scale circulation in the Southern Ocean 

    Wang, Liping (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1993-07)
    In this thesis, the dynamic role of bottom topography in a β-plane channel is systematically studied in both linear homogeneous and stratified layer models in the presence of either wind stress (Chapters 2, 3, 4, and 6) ...
  • Dynamics of freshwater plumes : observations and numerical modeling of the wind-forced response and alongshore freshwater transport 

    Fong, Derek A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-06)
    A freshwater plume often forms when a river or an estuary discharges water onto the continental shelf. Freshwater plumes are ubiquitous features of the coastal ocean and usually leave a striking signature in the coastal ...
  • Dynamics of global ocean heat transport variability 

    Jayne, Steven R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-02)
    A state-of-the-art, high-resolution ocean general circulation model is used to estimate the time-dependent global ocean heat transport and investigate its dynamics. The north-south heat transport is the prime manifestation ...
  • Dynamics of Langmuir circulation in oceanic surface layers 

    Gnanadesikan, Anand (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-09)
    This work investigates whether large-scale coherent vortex structures driven by wave-current interaction (Langmuir circulation) are responsible for maintaining the oceanic mixed layer. Langmuir circulations dominate the ...
  • The dynamics of mean circulation on the continental shelf 

    Shaw, Ping-Tung Peter (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1982-02)
    Mean long-isobath drift of the order 5 cm/sec has been observed on several continental shelves, e.g. in the Middle Atlantic Bight and in the Weddell Sea. A theoretical model is developed to explore the driving mechanism ...