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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 “"subglacial hydrology"”.
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Modeling Subglacial Hydrology in the Himalayas
… mass balance are all likely strongly affected by subglacial hydrology. Unfortunately, little is known about Himalayan glaciers due to their remoteness and the danger of doing field work there. Recent advances in subglacial hydrological modeling may allow us to shed more light on subglacial …
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The influence of subglacial hydrology on the flow of West Antarctic ice streams
Subglacial hydrology is known to influence the flow of ice. However, difficulty in accessing the base of large ice sheets has made determining the interaction between ice streams, basal sediment and water difficult to discern. The aim of this thesis is to determine the influence of subglacial …
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Inferring subglacial hydrology from investigations of supraglacial lake drainages and meltwater plumes at Store Glacier, West Greenland
… glaciers. Tidewater glaciers each have unique subglacial drainage systems and discharge meltwater into adjacent fjords differently. However, studies of the subglacial hydrology of individual tidewater glaciers have been limited, largely due to the difficulty in obtaining direct measurements. …
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Connect Store: A fully coupled 3D model of ice flow, calving, subglacial hydrology and ice-ocean interactions applied to Store Glacier, Greenland
… the coupled dynamics of the ice-calving-subglacial-hydrology-plume system at Store Glacier, a large, fast-flowing tidewater outlet glacier on the west coast of Greenland. Understanding these large outlet glaciers is critical to being able to accurately predict the future evolution of the …
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Modelling the impact of surface melt on the hydrology and dynamics of the Greenland Ice Sheet
… models are presented: an updated supraglacial hydrology model incorporating moulin and crevasse drainage, along with lake drainage over the ice surface via channel incision; an ice sheet model implementing a numerically efficient formulation of ice flow; an adjoint code of the ice flow model …
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The Hydrological System of Storglaciären, Sweden: Integrating Modelling with Observations
There is a need for more studies in glacier hydrology that integrate numerical models with detailed empirical data collected over one/multiple summer(s). This is especially true for physically based models whose main advantage lies in ability to predict basal water pressure because of its …
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The future of Narsap Sermia: Documenting the retreat of a tidewater glacier in Southwest Greenland
… 2019-2021. The study identified that changes in subglacial hydrology were pivotal in triggering and sustaining these retreats. Drainage of ice-dammed lakes or increased meltwater resulting from heatwaves over the ice sheet suddenly increased subglacial freshwater discharge, subsequently …
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Influence of meltwater on Greenland Ice Sheet dynamics
… across the Greenland Ice Sheet ablation zone and subglacial discharge at marine-terminating outlet glaciers. With the increase in annual ice sheet meltwater production observed over recent decades and predicted into future decades, understanding mechanisms driving the hourly to decadal impact of …
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Modelling meltwater drainage in the Paakitsoq region, western Greenland, and its response to 21st century climate change
… accessing the ice sheet bed results in high subglacial water pressures that lubricate the bed and enhance basal motion. This could in turn drastically amplify the contribution of GrIS to sea-level rise (SLR). However, the inadequate formulation of ice dynamics in current ice-sheet models was …
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Influence of meltwater on Greenland Ice Sheet dynamics
… across the Greenland Ice Sheet ablation zone and subglacial discharge at marine-terminating outlet glaciers. With the increase in annual ice sheet meltwater production observed over recent decades and predicted into future decades, understanding mechanisms driving the hourly to decadal impact of …
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Reduced modelling of mountains and ice sheets
… on a plastic till. I develop a simple model of subglacial hydrology that allows for meltwater storage and the flow of meltwater inside the till. Steady-state solutions are found and explored by varying the ablation-accumulation forcing and till permeability. I also study the asymptotic behaviour …
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Characterization of the basal hydraulic system of a surge-type glacier : Trapridge Glacier, 1989-92
Subglacial hydrology is a critical issue in understanding glacier and ice-sheet dynamics. This is especially true for surge-type glaciers, which are distinguished by their regular, quasi-periodic alternation between slow and fast flow regimes (Meier and Post, 1969); the fast flow during a surge is …
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Advanced Radar Sounder Data Analysis Methods under Limited labeled Data Constraints
… ice-sheet dynamics, bedrock topography, and subglacial hydrology, as well as in planetary exploration missions to reveal hidden geological structures. However, the vast archives of radargram data produced by these instruments remain largely underexplored. Traditional manual analysis is …