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.
Results
Showing 1 to 20 of 115 for “"Ocean surface"”.
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On wave-wave interactions on the ocean surface
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1992.
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Statistical predictability of Pacific Ocean surface temperature anomalies
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1979.
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Ocean Surface Maps From Blending Disparate Data Through Normal Mode Analysis
… data extracted from the U.S. Navy's Modular Ocean Data Assimilation System (MODAS) through Normal Mode Analysis (NMA). The NMA blending process is described, and surface maps of velocity and convergence are produced. Using statistical and qualitative techniques, the NMA generated “nowcasts” …
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Numerical and asymptotic modeling of evolving nonlinear ocean surface wave fields
… asymptotic and numerical modeling of nonlinear ocean surface wave fields. In particular, a development of an accurate numerical model for the evolution of nonlinear ocean waves, including extreme waves known as Rogue/Freak waves. Due to their elusive and destructive nature, the media often …
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A field investigation of air flow immediately above ocean surface waves
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1968.
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Link Stability Analysis of Wireless Sensor Networks Over the Ocean Surface
Ocean-surface Wireless Sensor Networks (WSN) are essential in various thalassic applications, such as maritime communication, ocean monitoring, seawater examination, pollution detection, etc. Formed by simple structured sensor nodes, ocean-surface WSN can improve the data transmission rate, enhance …
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Observations of turbulent fluxes and turbulence dynamics in the ocean surface boundary layer
… and energy-containing eddies in the ocean surface boundary 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 …
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Ocean-surface heterogeneity mapping: exploiting hypertemporal datasets in support of seascape ecology research
… of marine life throughout the world’s oceans. Studies often require both biological and environmental data from a variety of sources, which are increasingly complemented by data acquired using remote sensing and satellite-based sensors. Advances in remote sensing technology have …
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Modelling turbulence and transport of buoyant material in the ocean surface mixed layer
The ocean mixed layer (OML) is a significant and dynamically active part of the ocean which plays an important role in climate variability. Here, atmospheric processes such as winds, heat fluxes or density differences drive the generation of small-scale, three-dimensional turbulence and mixing of …
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Observations of turbulent fluxes and turbulence dynamics in the ocean surface boundary layer
… and energy-containing eddies in the ocean surface boundary 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 …
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An Ocean Surface Wind Vector Model Function For A Spaceborne Microwave Radiometer And Its Application
Ocean surface wind vectors over the ocean present vital information for scientists and forecasters in their attempt to understand the Earth's global weather and climate. As the demand for global wind velocity information has increased, the number of satellite missions that carry wind-measuring …
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Development of a reflective stereo slope gauge for the measurement of ocean surface wave slope statistics
An optical instrument for the measurement of surface ocean wave statistics has been developed and is presented in this thesis. Based on the reflective stereo slope gauge (RSSG) principle, it can simultaneously measure wave slope and height statistics. The instrument comprises a stereo camera setup …
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Wind wave tank for experimental investigation of momentum and enthalpy transfer from the ocean surface at high wind speed
… is controlled by the enthalpy transfer from the ocean surface and by drag. Direct measurements of drag, evaporation, and sensible heat transfer are not easily performed on the high seas. Therefore, a wind wave tank has been constructed in which a few aspects of a tropical storm are simulated. The …
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Interannual variability in Indian Ocean surface waters and tuna-environment relationships : filling the gaps with a coupled bio-physical ocean model
Study of the Indian Ocean has lagged behind that of the Atlantic and Pacific, with large knowledge gaps remaining in our understanding of regional or basin-scale controls on productivity and higher trophic levels. A lack of in situ data, especially for mid and upper trophic-level organisms, has …
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A Monte Carlo ray trace tool for predicting contrast in naval scenes including the effects of polarization
… of threat due to optical contrast with the ocean background. As part of this effort, an MCRT tool was created that allows the user to vary the shape and surface properties of a ship. A reverse MCRT was performed in order to reduce the processing time required to get accurate results. Using …
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An Improved Microwave Radiative Transfer Model For Ocean Emissivity At Hurricane Force Surface Wind Speed
… the microwave blackbody emission from the ocean surface under the forcing of strong surface winds in hurricanes is being developed. This ocean emissivity model will be incorporated into a larger radiative transfer model used to infer ocean surface wind speed and rain rate in hurricanes from …
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Azimuth Modulation of the Radar Backscatter at Near-Normal Incidence
<p>Radar observations of the ocean surface are becoming increasingly important. Common applications are wind retrieval and global weather forecasting and characterization. Because of the common use of ocean radar measurements, it is important to understand the sensitivity of the backscatter to both …
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Advancing the theory and applications of Lagrangian Coherent Structures methods for oceanic surface flows
Ocean surface transport is at the core of many environmental disasters, including the spread of marine plastic pollution, the Deepwater Horizon oil spill and the Fukushima nuclear contamination. Understanding and predicting flow transport, however, remains a scientific challenge, because it …
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Neural Operator Models as Applied to Fluid Flow Systems and Real Ocean Dynamics
… multiple domains including the atmospheric and oceanic ones, and in general, the larger fluids community. The present work investigates the possible effectiveness of such deep neural operator models for reproducing and predicting classic fluid flows and simulations of realistic ocean dynamics. …
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