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On coastal trapped waves at low latitudes in a stratified oceanRomea, Richard Dennis 10 June 1982 (has links)
The response on the continental shelf of a baroclinic ocean to
driving by an alongshore coastal wind stress and by barotropic and
baroclinic wind forced interior motions is studied as a function of
latitude. The relative excitation of continental shelf waves and
internal Kelvin waves is studied.
The response of a rotating stratified ocean with a vertical
boundary, forced at the surface by an alongshore coastal wind stress,
shows vertically propagating subinertial motions. Several examples
which illustrate the basic properties of the response are presented.
Changes in amplitude and frequency with depth are predicted.
Components that decay with depth from the surface and components
that represent coastal internal Kelvin waves with negative vertical
group velocity and upward phase propagation are forced.
The effect of bottom Ekman layer friction and slope topography
on free internal Kelvin waves is examined, using both a steep and
weak slope model. The steep slope represents the low latitude case
while the weak slope represents the mid-latitude case. There are
substantial differences between the results from the two models.
Free waves are frictionally damped and offshore and vertical phase
shifts are induced by friction, as well as an onshore flow. Topography
induces changes to the wave frequency and alongshore phase speed. The
modal amplitude is altered and an onshore flow is induced.
Sea level and current velocity data from the equator to 17°S on
the west coast of South America show that low frequency (0.1-0.2 cpd)
fluctuations propagate poleward with phase speeds similar to those
predicted for first mode baroclinic Kelvin waves. The sea level
and currents are coherent and approximately 1800 out of phase. The
waves do not appear to be the result of local atmospheric forcing.
Empirical orthogonal functions show that the alongshore and vertical
structure of alongshore velocity is consistent with first mode
internal Kelvin waves. / Graduation date: 1983
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The fractal structure of surface water waves near breakingM��nzenmayer, Katja 27 July 1993 (has links)
The goal of this research project is to determine the fractal nature, if any, which
certain surface water waves exhibit when viewed on a microscopic scale. We make
use of the mathematical formulation of non-viscous fluids describing their physical
properties. Using these expressions and including boundary conditions for free
surfaces as well as taking the surface tension into consideration, we obtain a partial
differential equation describing the dynamics of surface water waves.
A brief introduction to the study of fractal geometry with several examples
of well-known fractals is included. An important property of fractals is their non-integral
dimension. Several methods of determining the dimension of a curve are
described in this paper.
Our wave equation is examined under different assumptions representing
the conditions of a surface water wave near its breaking point. Solutions are
developed using analytical and numerical methods. We determine the dimension
of 'rough' solutions using one of the methods introduced and conclude that under
certain conditions, surface water waves near their breaking point exhibit a fractal
structure on a microscopic scale. / Graduation date: 1994
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Internal wave generation by intrusions, topography, and turbulenceMunroe, James Ross. January 2009 (has links)
Thesis (Ph. D.)--University of Alberta, 2009. / Title from PDF file main screen (viewed on Nov. 27, 2009). "A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Department of Physics, University of Alberta." Includes bibliographical references.
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Mesoscale forcing on ocean waves during Gulf Stream North Wall events /Okon, John A. January 2003 (has links) (PDF)
Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, March 2003. / Thesis advisor(s): Wendell A. Nuss, David S. Brown. Includes bibliographical references (p. 103). Also available online.
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Stability of transverse waves in shallow flowsKhayat, R. E. (Roger Edmond) January 1981 (has links)
No description available.
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A new method for modeling surface wave propagation in heterogeneous mediaKocaoglu, Argun H. 12 1900 (has links)
No description available.
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On scattering of seismic waves by a spherical obstacleTie, An 08 1900 (has links)
No description available.
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Nonlinear surface wave interactionsNassar, Abubakr A. (Abubakr Abbas) January 1974 (has links)
No description available.
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Free surface disturbances and nonlinear runup around offshore structuresOhl, Clifford Owen Groome January 2000 (has links)
Diffraction of regular waves, focused wave groups, and random seas by arrays of vertical bottom mounted circular cylinders is investigated using theoretical, computational, and experimental methods. Free surface elevation η is the defining variable used to test the potential theory developed. In addition, the nonlinearity of focused wave groups is investigated through the Creamer nonlinear transform and analysis of numerical wave tank data. Linear focused wave group theory is reviewed as a method for predicting the probable shape of extreme events from random wave spectra. The Creamer nonlinear transform, a realistic model for steep waves on deep water, is applied in integral form to simulate nonlinear focused wave groups. In addition, the transform is used to facilitate analysis of nonlinear wave-wave interactions within focused wave groups from a uni-directional numerical wave tank developed at Imperial College London. Experiments in an offshore wave basin at HR Wallingford are designed to measure free surface elevation at multiple locations in the vicinity of a multicolumn structure subjected to regular and irregular waves for a range of frequencies and steepness. Results from regular wave data analysis for first order amplitudes are compared to analytical linear diffraction theory, which is shown to be accurate for predicting incident waves of low steepness. However, second and third order responses are also computed, and the effects in the vicinity of a second order near trapping frequency are compared to semi-analytical second order diffraction theory. Analytical linear diffraction theory is extended for application to focused wave groups and random seas. Experimental irregular wave data are analysed for comparison with this theory. Linear diffraction theory for random seas is shown to give an excellent prediction of incident wave spectral diffraction, while linear diffraction theory for focused wave groups works well for linearised extreme events.
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Elastic surface waves guided by a rectangular overlay.Tu, Cheng Chun. January 1972 (has links)
No description available.
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