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 13 of 13 for “"crevasses"”.
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Constraining calving dynamics of marine-terminating glaciers: Developing 4D data of Store Glacier, Greenland, from repeat UAV photography
… at a sub-daily temporal scale. Maps of the crevasses across the glacier front for each survey were produced through Gaussian blurring of the DEMs, and show a clear progression of the fractures over time. However, there is no strong connection between the crevasse patterns and observed …
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A novel, easy-to-clean protein shaker
… A new design that eliminated all corners and crevasses was proposed and a prototype was constructed using rapid prototyping technology. The prototype provided further insight to additional improvements that could be made to the design. The goal of being easy to clean was successfully achieved.
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Geophysical investigations of icebergs in Antarctica
… waves, together with the existence of cracks and crevasses in the iceberg's surface, may be large enough to produce fracture. Other conclusions from the analysis are summarised. Comparisons with other relevant papers on iceberg tilting and bending have been made.
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Supraglacial lake evolution on the Greenland Ice Sheet
… lakes are ephemeral, drain through moulins or crevasses at their bed throughout the melt season, and deliver large volumes of water to the subglacial hydrological system. Such inputs of water can cause spatially and temporally constrained speed-up events affecting the normally slow, …
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Antarctic tabular icebergs in ocean waves
… while square, thick icebergs relatively free of crevasses can last for several years at sea.
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Inferring subglacial hydrology from investigations of supraglacial lake drainages and meltwater plumes at Store Glacier, West Greenland
… come from drainage of supraglacial lakes, crevasses and moulins. The water travel downstream through subglacial channels, eventually reaching the terminus of the glacier, where the freshwater discharge form buoyant plumes that rise through the ambient ocean water, and eventually reach the …
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UAV-based investigations into the hydrology and dynamics of the Greenland Ice Sheet
… in compressive mean stress compressive regimes, crevasses are more likely to display ponding and rapid hydrofracture than in extensional regimes, where continuous slow drainage is typical. Continued high-resolution observations are necessary to further identify key controls on the hydrological …
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Thermal Drilling and Anchoring on Icy Planetary Bodies
… ambient conditions. Furthermore, any regions of crevasses, ridges, penitentes, cryovolcano formations, and other extreme terrains would be inaccessible to existing rover designs. The “thermal pick” proposed here is a novel system to enable a rover to traverse even the most extreme Europan …
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Assessing the style of advance and retreat of the Des Moines Lobe using LiDAR topographic data
… resulted from sediment filling of transverse crevasses, cover ~60% of the lobe's area with stagnation landforms. Also, ~25 previously unmapped end moraine ridges have been identified.</p> <p>Transverse crevasse-fill ridges in the forefields of modern glaciers form due to longitudinal ice …
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Quaternary grounding-line fluctuations in Antarctica
… amounts of marine ice that accreted in basal crevasses and rifts before or during ice rise formation. Marine ice could have strengthened the damaged ice shelf, facilitating ice rise formation. Finally, I use cosmogenic nuclide concentrations in a subglacial bedrock core and a large ensemble of …
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Reconstructing the Surge History and Dynamics of Fisher Glacier, Yukon, 1948-2022
… have been lower than pre-surge velocities, the crevasses have closed up, and the rate of ice surface elevation change has been negative across the entire glacier. Fisher Glacier’s surge dynamics suggest predominantly hydrologically controlled surging, but with some aspects more representative of …
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Investigating Volcanic and Glacial Processes Using Microseismicity
… caused by crevassing, to see whether or not the crevasses observed are induced by hydrofracture. I use a combination of seismic observations and simple physical models to investigate these fundamental geophysical processes. Understanding the magmatic plumbing of a volcano is important for …
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Generación automática de malla de elementos finitos en modelos evolutivos de dinámica de glaciares
… contributions from the partial filling of the crevasses by surface meltwater. 3. Application of the model, using the grid routines developed, to the modelling of various glaciers with well-defined characteristics, including the ice divide of a cold ice rise, a land-terminating polythermal …