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 19 of 19 for “"Inertial waves"”.
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The vertical propagation of inertial waves in the ocean
… structure and temporal behavior of internal waves, particularly those with periods near the local inertial period. An important feature of the observed structure is the polarization of horizontal velocity components in the vertical. This polarization, along with temporal changes of the …
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The vertical propagation of inertial waves in the ocean.
Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Meteorology.
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Observations and models of inertial waves in the deep ocean
The structure of the inertial peak in deep ocean kinetic energy spectra is studied here. Records were obtained from Polymode arrays deployed in the Western North Atlantic Ocean (40°W to 70°W, 15°N to 42°N). The results are interpreted both in terms of local sources and of turning point effects on …
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Observations and models of inertial waves in the deep ocean
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1980.
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Hydromagnetic Oscillations and Instabilities in Astrophysical Discs
… provide an environment for the propagation of waves and the growth of instabilities unlike those normally encountered on Earth. In this dissertation, I investigate the properties of oscillations and instabilities in accretion discs, developing theoretical and numerical models to explore the …
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Nonlinear hydrodynamic instability and turbulence in eccentric astrophysical discs
… evolution of the parametric instability of inertial waves inherent to eccentric discs is studied by way of a new local numerical model. Mode coupling of tidal deformation with the disc eccentricity is known to produce exponentially growing eccentricities at mean-motion resonances, most …
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Enhanced vertical mixing within mesoscale eddies due to high frequency winds in the south China sea
… both the mesoscale eddy field and the near-inertial energy distribution display large spatial variability and they strongly influence the oceanic transport and mixing. With an ensemble of numerical integrations using a regional ocean model, this work investigates how the temporal resolution …
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Variability of black-hole accretion discs: a theoretical study
… instability that takes the form of propagating waves (viscous overstability). The time-dependent study looks at the conditions under which the transition between subsonic disc-like accretion, which occurs at large radii, and the supersonic flow characteristic of the immediate vicinity of the …
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The evolution of upper ocean thermal structure at 10°N, 125°W during 1997-1998
… enhancement of the vertical shear by strong near-inertial waves in the upper ocean superimposed upon intra-seasonal baroclinic Rossby waves and the large scale zonal flow.
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The evolution of upper ocean thermal structure at 10⁰N, 125⁰W during 1997-1998
… enhancement of the vertical shear by strong near-inertial waves in the upper ocean superimposed upon intra-seasonal baroclinic Rossby waves and the large scale zonal flow.
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Nonlinear Dynamics of Warped Astrophysical Discs
… predicted by a three-mode coupling analysis of inertial waves. After finding decent agreement with the theoretical growth rates, we proceed to understand the saturation mechanism as a wave breaking process which suppresses the growth of shorter wavelength couplings first, whilst allowing the …
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Experiments in a rotating source-sink annulus
… into three types. For ReL > 50, instability waves are observed in the Ekman layer flow. In the same Re range, inertial oscillations are detected in the interior region of the annulus. The observed inertial wave frequency at differing radial positions is explained by incorporating Doppler …
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Rotating, hydromagnetic laboratory experiment modelling planetary cores
… fluid. We have observed and identified inertial modes, which are bulk oscillations of the fluid restored by the Coriolis force. Over-reflection at a shear layer is one mechanism capable of exciting such modes, and we have developed predictions of both onset boundaries and mode selection …
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Stratified and stirred: Monsoon freshwater in the Bay of Bengal
… both submesoscale sheared eddies, and thin near-inertial waves, form such layers. Fast formation timescales and large aspect ratios suggest they enhance horizontal mixing by shear dispersion, reducing variance at ⇠1–10 km scales.
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Shearing waves and the MRI dynamo in stratified accretion discs
… transport: first, generation of acoustic waves by mixing of inertial waves, and second, the generation of a self-sustaining magnetic field via the magnetorotational instability (MRI) which would be a source of dissipative turbulence. Previous local simulations of the MRI have shown that …
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Broadband acoustic characterization of the deep scattering layer
… by fluid-like organisms. Energetic, near-inertial, oscillatory population movements with pronounced vertical shear were observed, likely driven by the “inertial drainpipe” effect of anticyclonic eddies that channel wind-generated near-inertial waves to depth. The superposition of wave and …
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Helical waves in Earth's outer core
… of wave packets in Earth's outer core. The waves of interest feed off the buoyancy field, and are supported by strong rotation and/or a large-scale magnetic field, two key features of the dynamics in Earth's core. We aim to better understand the role of wave packets in shaping the turbulent …
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The Variability of High-Frequency Motions and Their Interactions with the Mesoscale on the Mississippi Shelf
… weak barotropic tidal motions are present, near-inertial motions with diurnal frequencies constitute a significant fraction of the high-frequency motions. In shallow water, the wind-induced near-inertial motions are found to be suppressed by low-frequency downwelling that destroys or subdues the …
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Dispersive waves in Earth's outer core
… addresses the generation and propagation of waves in Earth's fluid outer core, with the objective of better understanding their role in maintaining our planet's magnetic field. The classes of waves studied, which owe their existence both to the rapid rotation of the Earth about its axis and …