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 73 for “"wave breaking"”.
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Dynamics of Atmospheric Gravity Wave Breaking in the Mesopause Region
… Thermosphere (MLT), and as a consequence of GW breaking, atmospheric turbulence plays an essential role in the mixing and transport of momentum, mass, and chemical materials in MLT. The main focus of this research for the fulfillment of the proposed Ph.D. dissertation is to improve the …
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Is the Indian Ocean MOC driven by internal wave breaking?
… the interaction between a broad band internal wave field and a mean flow using idealized numerical simulations (Part II). The main objective of this work is to quantify how much energy is needed to drive the Indian Ocean MOC and to compare this with the energy available in the internal wave …
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Extratropical impacts on Atlantic tropical cyclone activity: Rossby wave breaking and remote controls
DSpace SAF Submission Ingestion Package generated from Vireo submission #12040 on 2018-08-31 at 17:17:05
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Wave breaking onset and dissipation in a fully non-linear, staggered grid Boussinesq model
This research considers the pre- and post-breaking behavior of weakly-nonlinear (WNL) and fully-nonlinear (FNL) Boussinesq-type (BTE) models. We consider two primary questions: • 1. Is the FNL model capable of accurately reproducing shoaling behavior and esti- mates of parameters needed to describe …
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Measurements and models of fine-structure, internal gravity waves and wave breaking in the deep ocean
… in terms of thermocline-trapped internal wave modes in the presence of temperature and density fine-structure. Two turning-point uniformly valid asymptotic solutions to the internal wave equation are developed to describe the wave functions. Mode decay beyond the turning point in depth or …
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Measurements and models of fine-structure, internal gravity waves and wave breaking in the deep ocean.
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Detection and characterization of deep water wave breaking using moderate incidence angle microwave backscatter from the sea surface
The importance of wave breaking in both microwave remote sensing and air-sea interaction has led to this investigation of the utility of a Ku-Band CW Doppler scatterometer to detect and characterize wave breaking in the open ocean. Field and laboratory measurements by previous authors of microwave …
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Detection and characterization of deep water wave breaking using moderate incidence angle microwave backscatter from the sea surface
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1990.
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Phase-resolved reconstruction and forecast of nonlinear irregular wave field based on direct numerical simulations
… reconstruction and forecast of ocean wave field based on measurements is of basic scientific interest and practical importance in ocean science and marine engineering. This capability aids and expands the use and interpretation of field and wave basin measurements, contributing to the …
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Observations of turbulent fluxes and turbulence dynamics in the ocean surface boundary layer
… layer. A new technique was developed to separate wave and turbulent motions spectrally, using ideas for turbulence spectra that were developed in the study of the bottom boundary layer of the atmosphere. The observations of turbulent fluxes allowed the closing of heat and momentum budgets across …
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Observations of turbulent fluxes and turbulence dynamics in the ocean surface boundary layer
… layer. A new technique was developed to separate wave and turbulent motions spectrally, using ideas for turbulence spectra that were developed in the study of the bottom boundary layer of the atmosphere. The observations of turbulent fluxes allowed the closing of heat and momentum budgets across …
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Quantitative imaging of the air-water flow fields formed by unsteady breaking waves
… fields on the air and water side of unsteady breaking waves is presented. The method is applied to breaking waves to investigate the physics of the air and water flow fields to further our knowledge of the impact of wave breaking on air-sea interaction. The method includes a novel technique …
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Nature based solutions for coastal defense: Wave attenuation and economic analysis of marsh-fronted seawalls
… and urban coastal protection. A one-dimensional wave attenuation model was developed using first principles to capture four mechanisms that impact wave evolution: Wave breaking, vegetation drag, shoaling, and bed friction. In particular, the vegetation drag was modeled using the stem and leaf …
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A Dynamical Study of Gravity Waves and Instabilities in the Mesopause Region at Maui, Hawaii
… between tides and oppositely-propagating waves could explain the observed double-layer structure of large N2/strong wind shear. It is found, using the GROGRAT model, that tidal modulation has two effects on the wave propagation: (1) wave breaking levels descend at a tidal phase. (2) …
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Numerical Modelling of Breaking Waves under the Influence of Wind
Wave breaking plays an important role in air-sea interaction, surf zone dynamics, nearshore sediment transport, marine hydrodynamics, and wave-structure interaction. When the wind is blowing over water waves, it not only enhances the exchanges of heat, mass and momentum on the air-water interface, …
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Experimental And Analytical Investigations Of Solitary Waves On A Beach
… on a beach, i.e., the swash, due to solitary waves with the objective of understanding the flow processes that govern complex coastal hydrodynamics. The bed shear stress is identified as an important quantity and consequently, a shear plate sensor is developed to make accurate measurements of …
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Nonlinear behavior in the propagation of atmospheric gravity waves
… the nonlinear aspects of the propagation of the waves thought to drive the global circulation of the mesosphere-gravity waves. The results from two numerical experiments are presented comparing the dynamics of gravity wave breaking in two different frequency regimes. Analyses of these data are …
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The exchange of oxygen at the surface of open waters under wind forcing
… wind momentum exchange and the complex wave coupled hydrodynamics. Key elements of the laboratory investigations included the measurement of hydrodynamic behaviour within the aqueous viscous sub-layer using a particle image velocimetry (PIV) system and the development of a Laser Induced …
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An examination of the large-scale drivers of North Atlantic vertical wind shear and seasonal tropical cyclone variability
… analysis, I show that subtropical anticyclonic wave breaking (AWB) activity drives the second mode of variability in tropical zonal VWS, while El Niño-Southern Oscillation (ENSO) primarily drives the leading mode of tropical zonal VWS variability. Linear regressions of the four leading principal …
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