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 25 for “"Continental Shelves"”.
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Submarine Geomorphology of the Continental Shelves of Southeast and Southwest Greenland from Olex Data
… data to investigate the geomorphology of the continental margins of Southern Greenland. In particular, Olex data, which consist of multiple single-beam echo-sounder lines, were utilised. Turbidity current-channel systems and gullies on the continental slopes, and moraines on the continental …
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Efficient localization in a dispersive waveguide : applications in terrestrial continental shelves and on Europa
… methods developed are applied to the terrestrial continental shelf environment and the Jovian icy satellite Europa. The thesis is composed of two parts. First, a method is derived for instantaneous source-range estimation in a horizontally-stratified ocean waveguide from passive beam-time …
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Iceberg-keel ploughmarks on the seafloor of Antarctic continental shelves and the North Falkland Basin: implications for palaeo-glaciology
The use of iceberg-keel ploughmarks as proxy indicators of past and present iceberg morphology, keel depth and drift direction has seldom been approached in the southern hemisphere. Using high-resolution multi-beam swath bathymetry of the mid-shelf Pine Island Trough and outermost Weddell Sea shelf …
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Managing for long term sustainability of seafood production from bottom tendered wild capture fisheries
… affecting seafloor habitats across the world’s continental shelves. Minimizing these disturbances is a key objective of ocean management; however, opportunities to meet this objective have been hampered by limited information on the spatiotemporal extent and dynamics of fishing impacts. To …
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Changes in shelf waters due to air-sea fluxes and their influence on the Arctic Ocean circulation as simulated in the OCCAM global ocean model
… of deep basins surrounded by a large area of continental shelves, where cooling and ice formation play an important role in dense water formation. In the model these dense waters are transported by a circumpolar boundary current into the deep convection sites of the North Atlantic Ocean. The …
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The Legal Regime for Developing the Hydrocarbon Resources of the Outer Continental Shelf
Developing hydrocarbon resources of the outer continental shelf poses a fundamental problem to the coastal State and the International Sea- Bed Authority (ISA) where such resource transverse the outer limits of the continental shelf or it is located in the overlapping outer continental shelf of …
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Mesoscale circulation in the Black Sea : a study combining numerical modelling and observations
… between different areas of the ocean such as continental shelves and the deep seas. Despite the increasing number of studies on mesoscale processes, there are further important questions unanswered concerning the origin and evolution of eddies, the mechanisms enhancing mesoscale activity and …
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Difference in depositional behavior of hypopycnal and hyperpycnal flows in the context of continental margins
… continuous shelf systems, such as those on the continental margin, are not fully understood. Motivated by the observation that continuous shelf-like benches are found on the continental margins in oceans, but not in most lakes, it is proposed that salt is necessary for the creation of …
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Modern Foraminiferal Assemblages of the Denmark Strait
… reconstruction of environmental conditions on continental shelves occupied by arctic and subarctic waters. This study identifies, examines, and quantifies calcareous benthic foraminiferal faunas from a sediment core taken from the Denmark Strait. Our analysis of three-thousand individuals from …
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Cross-shelf exchange driven by dense flow down a canyon
… by polynyas on the Arctic and Antarctic continental shelves. Laboratory results corroborate prior numerical results suggesting that canyons are hotspots of cross-shelf exchange. When the dense water descends a canyon, it induces an onshore return flow of offshore water into the canyon. …
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Cross-Shelf Exchange Driven by Dense Flow Down a Canyon
… by polynyas on the Arctic and Antarctic continental shelves. Laboratory results corroborate prior numerical results suggesting that canyons are hotspots of cross-shelf exchange. When the dense water descends a canyon, it induces an onshore return flow of offshore water into the canyon. …
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When an eddy encounters shelf-slope topography
… boundary currents must then interact with continental shelf-slope topography at the western boundary. The presence of other eddies and mean lows complicates this simple picture, yet satellite images show that mesoscale eddies translating near the shelfbreak routinely affect the continental …
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Governance of Offshore Freshwater Resources
… brackish water reserves are sequestered in continental shelves around the world. These reserves take two completely different forms: aquifers and methane hydrates. Neither of these reserves has been commercially developed, and, while current technology could be utilized for aquifers, methods …
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When an eddy encounters shelf-slope topography
… boundary currents must then interact with continental shelf-slope topography at the western boundary. The presence of other eddies and mean flows complicates this simple picture, yet satellite images show that mesoscale eddies translating near the shelfbreak routinely affect the continental …
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Radium isotopes as tracers of boundary inputs of nutrients and trace elements to the coastal and open ocean
… inputs, including seafloor hydrothermal vents, continental shelves, and rivers. First, radium isotope ratios were used to constrain the age of hydrothermal plumes emanating from vents along the Mid-Atlantic Ridge and East Pacific Rise. These radium-derived ages were applied to determine the iron …
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In Support of a Rationally Managed Fishery: Age and Growth in Patagonian Toothfish (<i>Dissostichus eleginoides</i>)
… (<em>Dissostichus eleginoides</em>) occur on the continental shelves and shelf breaks of southern South America and the Southern Ocean. Stock structure, critical to good fisheries management, can be inferred from growth differences between areas, but available growth data are compromised by …
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Caracterização morfológica-sedimentar do vale inciso Apodi-Mossoró e plataforma continental adjacente - Bacia Potiguar Offshore
… incised valleys have been studied in different continental shelves, including the Brazilian continental margin. The interest to characterize this feature is given by the information that it can provide variations on sea level, as well as the ability to host economically significant quantities of …
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Constraining the pathways and fluxes of subglacial meltwater beneath the palaeo-Antarctic Ice Sheet
… channelised forms observed on the Antarctic continental shelf imply that there was an active subglacial hydrological system beneath the palaeo Antarctic Ice Sheet. The dimensions of the channelised features is inconsistent with the minimal quantities of meltwater produced under the Antarctic …
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Radium isotopes as tracers of boundary inputs of nutrients and trace elements to the coastal and open ocean
… inputs, including seafloor hydrothermal vents, continental shelves, and rivers. First, radium isotope ratios were used to constrain the age of hydrothermal plumes emanating from vents along the Mid-Atlantic Ridge and East Pacific Rise. These radium-derived ages were applied to determine the iron …
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Cyclic peritidal facies of a Cambrian aggraded shelf: elbrook and conococheague formations, Virginia Appalachians
… an aggraded, rimmed shelf on a mature, passive continental margin. Sedimentation rates for peri tidal carbonate environments far exceeded long term subsidence of the platform (3 to 5 cm/1000 yrs.); thus, the shelf stayed filled to sea level (i.e., was aggraded). Relative sea level rise did …
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