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 28 for “"Icebergs"”.
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Antarctic tabular icebergs in ocean waves
… of our existing knowledge of Antarctic tabular icebergs and their development. Data from in situ field experiments and automatic stations placed on the surface of icebergs are presented and analysed. The data comprise information on the sea state, iceberg geometry, structure and other features, …
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Geophysical investigations of icebergs in Antarctica
… of the factors involved in the response of icebergs to the environment, an automatic data collection platform was placed on a tabular iceberg in the Antarctic in February 1979. This experiment, and an analysis of some of the collected data, form the basis of this thesis. The background for …
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Using Space Borne Microwave Sensors to Track Large Antarctic Icebergs
<p>Studying Antarctic icebergs can provide insight into climatic changes of the Earth's frozen continent. Antarctic icebergs are regularly formed by the separations of massive sections of ice from ice shelves and glaciers. <p>The National Ice Center (NIC) is playing a major role in sea ice analysis …
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Storied Icebergs: Floating Formations of Decolonial Knowledge Production About the Canadian North
Storied Icebergs seeks to understand how, in the context of story(telling), Qallunaat knowledge production about the Canadian North might be decolonised. Inspired by Tiffany Lethabo King’s The Black Shoals (2019), this dissertation uses the iceberg as a critical terrain upon which to both …
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Sea ice thickness and iceberg distribution in the Southern Ocean
… the thickness of ice measured is the presence of icebergs within a study region. This thesis reports on work carried out to investigate whether a correction to the sea ice thickness PDF can be made to account for icebergs and over what scale(s) this correction is valid. To answer this question …
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Iceberg Stability Investigations Using Machine Learning for Alaska and Greenland
… (capsizing, fragmenting, disintegrating) icebergs and compare them to stable icebergs. While there are studies that investigate the mechanics of capsize, there are little to none which offer applicable results to implement in real-world scenarios for hazard mitigation. We use ground …
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The determinants of perinatal mortality in a teaching group of hospitals in Southern Africa
Icebergs - Why start a thesis thinking about icebergs? Death from medical conditions represents the tip of an iceberg. What causes death in some, will maim, injure or leave damaged in others. Death remains a parameter with which to measure part of the effect of a disorder on the mother or fetus. …
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Seafloor ploughmarks on the mid-Norwegian continental shelf reveal iceberg trajectories during the last glacial period
… depth and orientation analysis suggests that icebergs were generally sourced from southern margins, as icebergs drifted to the northeast via the NwAC, with the exception of icebergs thick enough to scour the floor of deeper cross-shelf troughs, which were likely more locally sourced from ice …
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Numerical Modelling of Sediment Delivery from Tidewater Glaciers to the Marine Environment
… of icebergrafting and glacial meltwater plumes. Icebergs calved from tidewater glaciers contain sediment, which is released as the icebergs melt. The SedBerg Model utilises Monte Carlo based techniques to simulate the formation, drift and melt of a population of icebergs, and the subsequent …
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Iceberg-keel ploughmarks on the seafloor of Antarctic continental shelves and the North Falkland Basin: implications for palaeo-glaciology
… was undertaken. By considering the draft of icebergs calved from Antarctica today, calculated from detailed satellite altimetric datasets by this work, almost all observed ploughmarks were interpreted to be relict features. In Pine Island Trough, ploughmark planform parameters and …
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Determination of Iron and Iron-Binding Ligands In Seawater With Flow Injection Analysis and Voltammetry
… years have seen an increased occurrence of large icebergs in the Southern Ocean originating from Antarctic ice shelves. These free-drifting icebergs may serve as an important source of Fe to surrounding waters. I measured the concentrations and speciation of dissolved Fe via flow …
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Questions and clarity: insights from applying computational methods to paleoclimate archives
… presently at Mono Lake. Next, the tracks of icebergs purged during Heinrich Events are simulated using the MIT General Circulation Model. This work, running multiple experiments exploring different aspects internal and external to the icebergs, reveals wind and sediment partitioning as …
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The influence of topography on ice-ocean interactions in coastal Antarctica
… East Antarctica, to test the impact of local icebergs on cross-shelf exchange, dense water formation, and ice shelf basal melt rates. We find that removing the Cape Darnley Ice Barrier increases CDW intrusions and decreases dense water formation due to changes to the sea ice cover and …
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The influence of topography on ice-ocean interactions in coastal Antarctica
… East Antarctica, to test the impact of local icebergs on cross-shelf exchange, dense water formation, and ice shelf basal melt rates. We find that removing the Cape Darnley Ice Barrier increases CDW intrusions and decreases dense water formation due to changes to the sea ice cover and …
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Questions and Clarity: Insights from Applying Computational Methods to Paleoclimate Archives
… presently at Mono Lake. Next, the tracks of icebergs purged during Heinrich Events are simulated using the MIT General Circulation Model. This work, running multiple experiments exploring different aspects internal and external to the icebergs, reveals wind and sediment partitioning as …
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Generación automática de malla de elementos finitos en modelos evolutivos de dinámica de glaciares
… con terminación en mar (proceso de generación de icebergs), que constituyen, desde el punto de vista teórico, las aportaciones esenciales de esta tesis doctoral. Estas se complementan con los resultados de las aplicaciones del modelo a glaciares de variada tipología, que ha llevado a conclusiones …
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Ice Island Deterioration in the Canadian Arctic: Rates, Patterns and Model Evaluation
… the deterioration processes of large tabular icebergs, known as ice islands, is limited within the Canadian Arctic. This study analyzed ice island deterioration through two aspects: 1) horizontal (areal) and 2) vertical (surface melt or ‘ablation’). Satellite images were digitized to monitor …
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Acoustical characterization of glacierized fjords
… between ambient noise and the speed of icebergs above the mooring and with calving events. In particular, the local acoustic field demonstrated a uniquely consistent period between late February and early April 2017 where a single cluster dominated observations. The beginning and end of …
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Submarine Geomorphology of the Continental Shelves of Southeast and Southwest Greenland from Olex Data
… was characterised by the calving of deep-keeled icebergs. In contrast, gullying offshore of inter-ice stream areas and evidence of meltwater sedimentation in Southwest Greenland, indicate that initial deglaciation was characterised predominantly by surface melting.
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The East Greenland Coastal Current : its structure, variability, and large-scale impact
… for melt water runoff, melting sea-ice and icebergs, and net precipitation minus evaporation.
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