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Adaptive error estimation in linearized ocean general circulation models
(Massachusetts Institute of Technology, 1999)
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 ...
Surface and bottom boundary layer dynamics on a shallow submarine bank : southern flank of Georges Bank
(Massachusetts Institute of Technology, 1999)
The thesis investigates the circulation at a 76-m deep study site on the southern flank of Georges Bank, a shallow submarine bank located between the deeper Gulf of Maine and the continental slope. Emphasis is placed on ...
Wind-driven circulation on a shallow, stratified shelf
(Massachusetts Institute of Technology, 1999)
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 ...
Steady models of arctic shelf-basin exchange
(Massachusetts Institute of Technology, 1998)
Diapycnal advection by double diffusion and turbulence in the ocean
(Massachusetts Institute of Technology, 1999)
Observations of diapycnal mixing rates are examined and related to diapycnal advection for both double-diffusive and turbulent regimes. The role of double-diffusive mixing at the site of the North Atlantic Tracer Release ...
Generation and maintenance of recirculations by Gulf Stream instabilities
(Massachusetts Institute of Technology, 1999)
This thesis studies the problems of generation and maintenance of recirculations by Gulf Stream instabilities. Observations show that the horizontal structure of the jet and its recirculations suffer significant changes ...
Multiple equilibria and low-frequency variability of wind-driven ocean models
(Massachusetts Institute of Technology, 1998)
Assessment of mesoscale eddy parameterizations for coarse resolution ocean models
(Massachusetts Institute of Technology, 1999)
Climate simulation with numerical oceanic models requires a proper parameterization scheme in order to represent the effects of unresolved mesoscale eddies. Even though a munber of schemes have been proposed and some have ...
Dynamics of global ocean heat transport variability
(Massachusetts Institute of Technology, 1999)
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 ...
Studies of lateral dispersion in the ocean
(Massachusetts Institute of Technology, 1998)
This thesis is written in two parts. The first part deals with the problem of lateral dispersion due to mesoscale eddies in the open ocean, and the interaction between the mesoscale strain and horizontal diffusion on spatial ...