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 35 for “"ice dynamics"”.
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Remote sensing of ice dynamics in the Beaufort Sea
Arctic summer sea ice extent has undergone dramatic declines over the past several decades, particularly in the Beaufort Sea. The comprehension of the sea ice decline requires an understanding of the annual sea ice retreat during the summer melt season. While there are observations of the seasonal …
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Remote Sensing of Ice Dynamics in the Beaufort Sea
Arctic summer sea ice extent has undergone dramatic declines over the past several decades, particularly in the Beaufort Sea. The comprehension of the sea ice decline requires an understanding of the annual sea ice retreat during the summer melt season. While there are observations of the seasonal …
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A fast and efficient solver for viscous-plastic sea ice dynamics
Sea ice plays a key role in the global climate system. Indeed, through the albedo effect it reflects significant solar radiation away from the oceans, while it also plays a key role in the momentum and heat transfer between the atmosphere and ocean by acting as an insulating layer between the two. …
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Reconstructing ice dynamics in the central sector of the last British-Irish Ice Sheet
… and Scottish borders) of the last British-Irish Ice Sheet exhibits a palimpsest glacial geological and geomorphological signature characteristic of multi-phase ice flow and ice-marginal fluctuations. Despite its influential position at the heart of the British-Irish Ice Sheet, sourced from major …
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Ice dynamics and glacial history from remote sensing of the Seno Skyring-Seno Otway-Strait of Magellan region, southernmost Patagonia
… the advance and retreat of the Patagonian ice sheet over a number of glacial cycles. The well-preserved landform assemblages and sediments that have been left behind comprise one of the longest and most complete records of Quaternary glaciations in the world. Despite this, little is known …
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A Small-Scale Model of Sea Ice Dynamics in the Antarctic Marginal Ice Zone Using Fluid-Structure Interaction and the Reference Map Technique
Sea ice covers approximately 10% of the Earth's surface and modulates the sea-air heat and momentum exchange, therefore playing a major role in the global climate. The Antarctic marginal ice zone (MIZ) is the seasonally varying region between the open Southern Ocean and the Antarctic pack ice. It …
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Development of a multi-tier system for the analysis of ice crystallography of Antarctic shelf ice
This research delves into the complex ice dynamics of the under-studied Antarctic shelf ice, aiming to establish a comprehensive, multilevel approach for analyzing ice layer crystallography in these regions, with a specific focus on c-axis orientations and grain sizes. This approach encompasses the …
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Tracking retreat processes at the Falljökull Glacier, SE Iceland
In glacial systems, hydrological forcing of ice velocity may lead to instability and accelerated mass loss. However, recent studies have demonstrated that the relationship between ice melt and ice dynamics is non-linear because subglacial drainage configuration strongly modulates meltwater inputs …
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Modelling meltwater drainage in the Paakitsoq region, western Greenland, and its response to 21st century climate change
Recent studies suggest that the Greenland Ice Sheet (GrIS) is thinning rapidly and contains sufficient water equivalent to raise global sea levels by ~7m. The dynamic response of ice sheets to rising air temperatures has been well documented, whereby increased surface meltwater accessing the ice …
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SHARC Buoy: Robust firmware design for a novel, low-cost autonomous platform for the Antarctic Marginal Ice Zone in the Southern Ocean
Sea ice in the Antarctic Marginal Ice Zone (MIZ) plays a pivotal role in regulating heat and energy exchange between oceanic and atmospheric systems, which drive global climate. Current understanding of Southern Ocean sea ice dynamics is poor with temporal and spatial gaps in critical seasonal …
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Polar Region Sea Ice Classification With Multimodal Learning
… accurate monitoring and classification of sea ice. This thesis presents a multimodal learning approach for classifying polar sea ice thickness using both satellite imagery and altimetry data. The objective is to distinguish between thick ice, thin ice, and open water, which are crucial for …
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Aerodynamic and Thermal Considerations for an Antarctic Ice Penetrator
The Seismo-Geodetic Ice Penetrator (SGIP) is a helicopter-deployed kinetic penetrator designed to deliver a Global Navigation Satellite System (GNSS) and geodesy-grade seismometer to the Ross Ice Shelf (RIS) in Antarctica such that the seismometer becomes buried 2 m deep in the ice, ensuring …
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Computational modelling of ice floe dynamics in the Antarctic marginal ice zone.
The contribution of Antarctic sea ice in global climate models requires a more accurately estimation, as a relatively large part, approximately 4% of the Earth's surface in the winter season, is covered by sea ice. Understanding the dynamic and thermodynamic processes of sea ice, results in a …
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Seasons in the Stream: River Ecosystem Phenology in a Changing Climate
… river (Chapter 3), and in evaluating whether ice cover determines patterns of primary productivity along a river continuum (Chapter 4). Finally, I provide a framework for evaluating how climate change may be impacting the patterns of primary productivity in rivers (Chapter 5). In Chapter 2, we …
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Investigating Volcanic and Glacial Processes Using Microseismicity
… rise. The movement of melt at volcanoes, and ice at and near the Earth′s poles, can be investigated using microseismicity, emitted when these fluids and bodies release kinetic energy as they move. I use this microseismicity to study: melt moving from the deep crust and feeding Bardarbunga …
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Mesoscale Wind and Temperature Changes over Peatlands of the Hudson Bay Lowlands: impacts on the Surface Energy Balance and Net CO2 Exchange
… warming has caused observed changes in the sea ice dynamics and energy budget of the Hudson Bay, yet it is presently unknown how these climatic changes in the Bay will impact the surface energy and carbon balance of the adjacent HBL. As a globally significant peatland carbon pool, the HBL will …
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Where the Ice Ends: Calving and Ice-Ocean Interactions at Helheim Glacier and Beyond
Continued mass loss of the Greenland Ice Sheet has contributed to sea level rise at a rate of 0.8 mm year$^{-1}$ since 2002, with ice dynamics accounting for $66 \pm 8$\% of the mass loss signal. One of the main components of this dynamic mass loss signal is iceberg calving, the detachment of ice …
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Reconstructing the depositional history of the Eel River paleo meltwater channel, northeastern Indiana using sediment provenance techniques
… originated from the Erie Lobe of the Laurentide Ice Sheet, but do contain some sediment from the Saginaw Lobe. This determination helps clarify the ice dynamics and Last Glacial Maximum sediment depostional history in northeastern Indiana, which is complicated because of the interactions between …
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Modelling the impact of surface melt on the hydrology and dynamics of the Greenland Ice Sheet
Increasing surface runoff from the Greenland Ice Sheet due to a warming climate not only accelerates ice mass loss by altering surface mass balance, but may also lead to increased dynamic losses. This is because surface melt draining to the bed can reduce ice-bed coupling, leading to faster ice …
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