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 11 of 11 for “"Antarctic ice shelves"”.
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The flow and fracture of Antarctic Ice Shelves
This thesis explores the deformation of glacier ice, with an aim of deriving insights into its flow and fracture through satellite remote sensing methods. Glaciers deform through the driving force of their own weight and display dramatic responses to both external forcing, such as changes in …
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The Flow and Fracture of Antarctic Ice Shelves
This thesis explores the deformation of glacier ice, with an aim of deriving insights into its flow and fracture through satellite remote sensing methods. Glaciers deform through the driving force of their own weight and display dramatic responses to both external forcing, such as changes in …
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Ocean mixing and heat transport beneath Antarctic ice shelves
Ocean-driven melting of floating ice shelves is currently the main process controlling Antarctica’s contribution to sea level rise. However, despite major advances in the study of ice shelf-ocean interaction over recent decades, key processes governing basal melting remain poorly understood, …
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A New Method for Melt Detection on Antarctic Ice-Shelves and Scatterometer Calibration Verification
… periods of surface melt and freeze in the Antarctic ice-shelves. The normalized radar backscatter (sigma-0) and backscatter polarization ratio (PR) are used in the maximum likelihood estimation of the ice-state. This method is used to infer the daily ice-surface conditions for 25 selected …
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Investigating the surface hydrology of Antarctic ice shelves using remote sensing and machine learning
Surface meltwater is widespread across many of Antarctica’s ice shelves and can contribute towards ice-shelf instability and potential collapse via hydrofracture or militate against potential ice-shelf instabilities by forming drainage systems that export surface meltwater off the ice-shelf edge. …
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An investigation into pixel- and object-based classification approaches for the detection of dolines on the surface of Antarctic ice shelves
Ice dolines are distinctive bowl-shaped depressions observed on many Antarctic ice shelves. They are interpreted as the results of meltwater ponds at or near the surface draining into or through the shelf column. Dolines are characterised by a typical morphology of a raised rim surrounding the …
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The Flow Dynamics and Buttressing of Ice Shelves
… I explore the flow dynamics associated with ice shelves confined within channels and the buttressing they provide to grounded ice. Ice shelves are the floating extensions of ice sheets and act as the interface between the ice sheet and the ocean. They form when ice flows out from the interior …
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Mechanical Shock Analysis and Testing of an Air-Dropped Antarctic Ice Penetrator
The Seismo-Geodetic Ice Penetrator (SGIP) is an air-dropped kinetic penetrator that will deposit a geophysics-grade seismometer and GPS receiver into Antarctic ice shelves. These instruments will measure vibrations in the infragravity (< 0.1 Hz) range to improve understanding of forces that cause …
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Sea-ice and ice-shelf variability in the Amundsen Sea Embayment, West Antarctica
Global sea-level rise contributed by Antarctic ice-mass loss could soon outpace all other sources. The ice-mass-loss signal of the Antarctic Ice Sheet is dominated by the Amundsen Sea Embayment (ASE) in West Antarctica. Ice shelves in the ASE influence the ice-mass-loss rates of the Antarctic Ice …
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Quantification of the Impact of Supraglacial Lakes and Slush on Surface Energy Balance of Ice Shelves: Nivlisen Ice Shelf, East Antarctica
… lakes (SGLs) and slush are prevalent features of Antarctic ice shelf surface hydrology and efficiently transfer energy to the ice by melt-albedo feedbacks (Dell et al., 2020; Moussavi et al., 2020). There have been few efforts to quantify the energy exchanges between supraglacial meltwater, …
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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 …