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 61 for “"Thermal structure"”.
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E-Region Ionization and Thermal Structure
Made available in DSpace on 2014-12-08T22:24:12Z (GMT). No. of bitstreams: 1 6711895.pdf: 5880066 bytes, checksum: f241cbc5036f9f5185671ceb3b150909 (MD5) Previous issue date: 1967
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Thermal Structure of Mid-Crustal Shear Zones
Analysis of quartz c-axis fabrics and microstructures from ductily deformed rocks allows for the examination of the kinematics associated with crustal deformation. This thesis expands on the current knowledge of the kinematic evolution of the Himalayas and Scottish Caledonides, by examining samples …
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The tropopause region thermal structure and tropical cyclones
… and ozone variations radiatively influence the thermal structure of the tropopause region? Second, what sets the thermodynamic limits of tropical cyclone intensity across the seasonal cycle? The link between these subjects is tropical cyclone outflow, which often reaches into the tropopause …
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Effects of Initial Thermal Structure on the Evolution of Continental Rifting
… Previous research suggests that the initial thermal structure may have a first order control on the evolving styles of these systems. This project examines the impact of the initial thermal structure on the spatial and temporal evolution of continental rifts using finite element …
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Surface heat flow and lithospheric thermal structure of the northwestern Arabian Plate
… heat flow (qs) is paramount for modeling the thermal structure of the lithosphere. Changes in the qs over a distinct lithospheric unit are normally directly reflecting changes in the crustal composition and therewith the radiogenic heat budget (e.g., Rudnick et al., 1998; Förster and Förster, …
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The evolution of upper ocean thermal structure at 10°N, 125°W during 1997-1998
In this thesis I have endeavored to determine the factors and physical processes that controlled SST and thermocline depth at 10°N, 125°W during the Pan American Climate Study (PACS) field program. Analysis based on the PACS data set, TOPEX/Poseidon sea surface height data, European Remote Sensing …
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Studies of South China Sea circulation and thermal structure using a three dimensional numerical model
The seasonal ocean circulation and thermal structure in the South China Sea (SCS) were studied numerically using the Princeton Ocean Model (POM) with 20 km horizontal resolution and 23 sigma levels conforming to a realistic bottom topography. A sixteen month control run was performed using …
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The thermal structure of collisional orogens – insights from the Grenville orogen in Canada and Scotland
… crust. This is essential to examining the thermal structure of orogens and their co-evolution with crustal deformation patterns. In this thesis, I present a multi-method approach to the study of the Mesoproterozoic (c. 1.1–1.0 Ga) Grenville orogen, integrating P–T results from phase …
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Detail of the thermal structure of oceanic fronts in the Southern ocean south of Africa
This investigation addresses the thermal characteristics of the major oceanic frontal systems in the Southern Ocean south of Africa based on data collected to a depth of 500 m on forty-three cruises during a fifteen year period. The width of the Agulhas Front has been shown to vary considerably in …
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An investigation of the thermal structure in the vicinity of IPOD sites 417 and 418
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1979.
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The evolution of upper ocean thermal structure at 10⁰N, 125⁰W during 1997-1998
In this thesis I have endeavored to determine the factors and physical processes that controlled SST and thermocline depth at 10⁰N, 125⁰W during the Pan Amer- ican Climate Study (PACS) field program. Analysis based on the PACS data set, TOPEX/Poseidon sea surface height data, European Remote …
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The circulation and thermal structure of False Bay: a process-oriented numerical modelling and observational study
False Bay, the largest bay in South Africa, lies between two of the world's most in-fluential current systems: the Agulhas and Benguela Current Systems. False Bay is situated at a biogeographic break (Pitcher et al., 2010), belonging to both the South-ern Benguela upwelling system and the Western …
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The effect of topography on the Martian atmospheric circulation and determining Pluto's atmospheric thermal structure from stellar occultations
… modified to include topography. The model was thermally forced by Newtonian relaxation to an equilibrium temperature profile calculated with daily averaged solar forcing at constant season. Two sets of equilibrium temperatures were considered that either contained the effects of convection or …
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Thermal structure, compensation mechanisms, and tectonics of actively-deforming continents : Baikal Rift Zone and large-scale overthrust and extensional terrains
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
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A comparison of melt depletion, thermal structure and metasomatism of proterozoic mantle lithosphere in the Namaqua-Natal and Rehoboth Provinces of Southern Africa
… These are used to constrain and compare the thermal structure, the extents of melt extraction and metasomatism of the two mantle terranes with each other and with the Archaean Kaapvaal craton. Xenoliths from the Rietfontein and Pofadder localities have never previously been studied in detail. …
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The thermal and mechanical structure of stable continental lithosphere within a dynamic mantle
… mantle is not only important for determining the thermal structure and the role of continental lithosphere in the Earth's heat loss system, but also for determining the deformation response of continental lithosphere. This thesis presents the results from numerical simulations and scaling analyses …
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Temperature analysis for lake Yojoa, Honduras
… helps to understand the seasonal changes in the thermal structure of the lake, and it also indicates the seasonal changes in the water quality of the lake. The lake is marginally stratified most of the year, with a maximum difference of 4°C between the water surface and the lake bottom. The …
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Seasonal and Diurnal Variations in the Temperature and Sodium Density Structure of the Middle Atmosphere
… characterization of tidal oscillations. The thermal structure was determined from 80 to 105 km, and the Na density structure from 76 to 108 km. The annual mean temperature structure is determined largely by radiative equilibrium. Indirect heating mechanisms such as chemical heating, …
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Cyclone climatology of the Great Lakes
… region with significant impacts on ice cover, thermal structure, water quality, aquatic life, shipping, and shoreline property. For this research, a historical cyclone dataset was constructed for the period 1900 to 1990. This dataset was used to address the following five research topics: (a) …
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Kinematic and flexural isostasy modeling in central nepal: using erosional, depositional, and cooling histories to validate a balanced cross section
… experienced rapid shortening, the subsurface thermal structure is too complex to estimate cooling ages from the flexural isostasy model using a constant geothermal gradient. Cooling ages should be modeled using thermokinematic modeling software to determine the evolution of the thrust belt …
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