Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 142 for “"Barotropic"”.
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Tomographic measurements of barotropic motions
… between received pulses is used to estimate barotropic fluctilations. Analysis of the resulting time series reveals resonant oscillations at nontidal frequencies in the Northeast Pacific. Some of the periods of the resonant oscillations are consistent with theory (Platzman, Curtis, Hansen, …
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Barotropic Model Simulations of Low-Frequency Variability
… maintaining the low-frequency variability in the barotropic system under subcritical condition. Stochastically forced experiments are conducted using spatially homogeneous forcing. In the weakly subcritical cases, the model produces spatially and temporally coherent variability, with the first two …
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Barotropic instability of an initial value problem
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1985.
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Sub-Maximal Exchange Flow over a Sill with Barotropic Forcing
… theoretical treatment. Time-dependent external barotropic forcing (i.e. the tide) modifies the time-averaged exchange flow in a strait. The relationship between tidal forcing and the average exchange flow in a channel has been examined for maximal exchange (Helfrich, 1995). In the present study, …
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Adjusting storm-influenced wind observations for barotropic hurricane track prediction.
Thesis. 1978. M.S.--Massachusetts Institute of Technology. Dept. of Meteorology.
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Barotropic prediction of 500-MB and 100-MB flow patterns
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1961.
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A numerical study of eddy interactions with a barotropic oceanic jet
Mesoscale vortices generated by western boundary currents are well observed and documented, particularly in the case of the Gulf Stream System. The movement of these rings in the region of the Gulf Stream is well studied and has been ascribed to the following physical mechanisms: (1) the beta …
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Adjoint data assimilation in an open ocean barotropic quasi-geostrophic model
A barotropic quasi-geostrophic ocean model with open boundaries was used to model a system of mid-ocean eddies. A simplified adjoint assimilation scheme was tested to see if sparse velocity data could be assimilated into the model at regular intervals. In between the times for data assimilation, …
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Multiple equilibria and their stability in a barotropic and baroclinic atmosphere
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1982.
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A numerical study of barotropic instability of a zonally varying easterly jet.
The structure and behavior of barotropically unstable and stable wave disturbances in the vicinity of a zonally varying easterly jet are studied numerically with a linearized barotropic vorticity equation on a B-plane. The easterly jet is approximated by a Bickley jet with a slow zonal variation. …
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Barotropic instability and asymmetric mixing in hurricanes with primary and secondary eyewalls
… is studied in the context of a nondivergent barotropic framework. The stability of primary and secondary eyewalls is considered through linear analyses and numerical experiments using a pseudospectral model. For the case of unstable primary eyewalls, which are idealized as annular rings of …
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Generalized Barotropic Models for Studying the Low -Frequency Variability of the Extratropical Atmosphere
… model are more stable than the ones of the barotropic model. Also the modified barotropic optimal modes are more difficult to excite than their barotropic counterparts. These results are in accordance with previous studies that found that barotropic dynamics may not quantitatively describe …
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Barotropic or baroclinic instability: which is dominant in the unpredictability of a 28-variable atmospheric model?
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1973.
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Measurements of a barotropic planetary vorticity mode in an eddy-resolving quasi-geostrophic model using acoustic tomography
… travel time changes can detect large-scale barotropic oscillations. Time series of sea surface elevation and upper and lower layer meridional currents are generated for comparison against a series of acoustic travel times. The spectra of these time series exhibit a broad mesoscale peak near …
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The adjustment of barotropic currents at the shelf break to a sharp bend in the shelf topography
… near the Northeast Channel, the adjustment of a barotropic current near a shelf-break to a sharp bend in the shelf topography is studied numerically. For parameters within the oceanographic range, the adjustment to the bend is smooth and steady with no eddies shed at the corner. The vorticity …
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The adjustment of barotropic currents at the shelf break to a sharp bend in the shelf topography
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1996.
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Global barotropic variability of the ocean in response to atmospheric forcing based on multichannel regression and Kalman filter techniques
… can be adequately described by linear barotropic ocean models: the multichannel regression and the optimal smoothing techniques. We start with the simplest linear vorticity balance and continue by building a hierarchy of more complicated models by including effects of topography and …
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Global barotropic variability of the ocean in response to atmospheric forcing based on multichannel regression and Kalman filter techniques
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1996.
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