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 1081 for “"Oceanic"”.
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Evolution of the oceanic lithosphere and shear wave travel time residuals from oceanic earthquakes
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Brittle Fracture in Oceanic Basalts
Basalt samples dredged from the ocean floor were experimentally fractured in tension while being observed microscopically. Five basaltic textural types were chosen: (1) cotectic crystallization of olivine, plagioclase, and pyroxene Juan de Fuca, (2) dark glass matrix with phenocrysts of …
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Oceanic mixed layer entrainment zone dynamics
The Naval Postgraduate School mixed layer model is augmented to include an entrainment zone with finite thickness. The role of entrainment shear production of turbulent kinetic energy is investigated by comparing model results that include the new entrainment zone with observations at Ocean Weather …
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Earthquake Processes Along Oceanic Transform Faults
… rupture behavior of earthquakes occurring along oceanic transform faults (OTFs), with a particular focus on the integration of hydroacoustic observations (T-waves). Oceanic transform faults are a key plate boundary structure, yet their rupture processes and mechanical properties remain less …
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The accretion of lower oceanic crust
… models that describe the accretion of the lower oceanic crust at fast spreading rates. The first approach uses the record of hydrothermal alteration of the ocean crust, including Sr and O-isotopes, to investigate and quantify the role of hydrothermal circulation during the accretion of the ocean …
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The dynamics of extratropical oceanic cyclones.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Meteorology.
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The oceanic heat budget near Bermuda.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1969.
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Mechanistic models of oceanic nitrogen fixation
Oceanic nitrogen fixation and biogeochemical interactions between the nitrogen, phosphorus and iron cycles have important implications for the control of primary production and carbon storage in the ocean. The biological process of nitrogen fixation is thought to be particularly important where the …
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Global isotopic signatures of oceanic island basalts
… island groups, 3 seamounts or seamount chains, 2 oceanic ridges and 1 oceanic plateau [for a total of 36 geographic features] are compiled to form a comprehensive oceanic island basalt [OIB] data set. These samples are supplemented by 90 selected mid-ocean ridge basalt [MORB] samples to give …
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Spectral description of low frequency oceanic variability
… spectral description of low frequency oceanic variability. Such a spectrum has wide application in oceanography, including the optimal design of observational strategy for the deployment of floats, the study of Lagrangian statistics and the estimate of uncertainty for heat content and …
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eBhish' - articulations of Black Oceanic presence eThekwini
The legacies of colonialism and apartheid echo in many forms of social practice in contemporary South Africa. Ibhish' laseThekwini (the Durban beachfront), a seaside public space, is imbued with a racialized tension that stems from these colonial histories. Historically, the beach was the nation's …
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Spectral description of low frequency oceanic variability
… spectral description of low frequency oceanic variability. Such a spectrum has wide application in oceanography, including the optimal design of observational strategy for the deployment of floats, the study of Lagrangian statistics and the estimate of uncertainty for heat content and …
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Deep-sea corals : a new oceanic archive
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1998.
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Feedback mechanism in the oceanic carbon cycle
… dynamics of the atmosphere-ocean system and the oceanic reservoir of CO 2 on the 101 to 103 years time scale. The atmosphere-ocean coupled model is originally developed by Marotzke (20,21), and the biogeochemical model is developed by Follows(personal communication). The atmosphere-ocean-carbon …
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The hydrothermal alteration of oceanic basalts by seawater
Considerable geological and geophysical evidence now exists to support the hypothesis that seawater circulates through freshly intruded basalt at the mid-ocean ridges. As a consequence of this process, reactions between basalt and seawater take place at elevated temperatures. The mineralogy and …
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Transformations of carotenoids in the oceanic water column
… that transform carotenoid pigments in the oceanic water column were studied. Suspended particulate matter collected from surface waters of Buzzards Bay, Massachusetts and the Peru upwelling system has a carotenoid distribution reflecting the phytoplanktonic source of the material. The …
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A Field Study of Oceanic Turbulent Horizontal Diffusion.
Richardson's "four-thirds law" of horizontal diffusion was tested using aerial photography as a data gathering technique. Plywood floats and current crosses suspended both near the surface and at nine feet were used as diffusers. The scales investigated ranged from 10 to 525 meters. The …
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A search for layering in the oceanic crust
… have shown that the seismic structure of the oceanic crust can be usefully parameterized by a small number of locally horizontal layers within which the rates of change of velocity and impedance as a function of depth are approximately constant. Layer boundaries are defined by changes in …
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Earthquake behavior and structure of oceanic transform faults
Oceanic transform faults that accommodate strain at mid-ocean ridge offsets represent a unique environment for studying fault mechanics. Here, I use seismic observations and models to explore how fault structure affects mechanisms of slip at oceanic transforms. Using teleseismic data, I find that …
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