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Showing 1 to 12 of 12 for “"supraglacial lake"”.
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Supraglacial lake evolution on the Greenland Ice Sheet
Abstract. Supraglacial lakes form annually on the surface of the Greenland Ice Sheet around Paakitsoq, north of the Jakobshavn Isbrae outlet glacier. The lakes are ephemeral, drain through moulins or crevasses at their bed throughout the melt season, and deliver large volumes of water to the …
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Inferring subglacial hydrology from investigations of supraglacial lake drainages and meltwater plumes at Store Glacier, West Greenland
… drainage systems 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 …
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The development and application of IceLake, an accurate and computationally efficient model of supraglacial lake evolution in the ablation zone of the Greenland Ice Sheet
The supraglacial hydrological system of the Greenland Ice Sheet (GrIS) delivers ~60% of total mass loss from the ice sheet to the ocean (van den Broeke et al., 2016), making a thorough understanding crucial for sea level rise predictions. Supraglacial lakes play a crucial role in the evolution of …
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Evidence for the Drainage of a Superglacial Lake as the Source of Seismic Waves Recorded at a Regional Distance
… during the summer leads to the formation of lakes on the Greenland Ice Sheet surface, known as supraglacial lakes. Some of these lakes drain through cracks in their beds and release the water into the ice sheet. Previous studies suggest that some of the water reaches the bedrock, enabling …
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Marine-terminating outlet glacier response to hydrological mechanisms: A comparative study at Store Glestcher and Rink Isbrae, Uummannaq Bay, West Greenland
… of hydrological processes via surface runoff and supraglacial lake drainage. There has been increasing evidence for the influence of enhanced meltwater inputs on impacting short term velocity at marine-terminating outlet glaciers with contrasting responses at individual glaciers. This study uses a …
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Analysis of the surface hydrology of the Greenland Ice Sheet using Sentinel-1 Synthetic Aperture Radar
… to form features such as firn slush zones and supraglacial lakes. This study uses imagery from the recently launched Sentinel-1 Synthetic Aperture Radar sensors to investigate supraglacial lakes in southwest Greenland. This novel method can overcome some of the limitations of optical sensors …
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UAV-based investigations into the hydrology and dynamics of the Greenland Ice Sheet
… the causes and dynamic influence of a rapid supraglacial lake drainage. I show that rapid drainage can induce a significant dynamic response up to 4 km away from the lake itself, and that fracture history can exert controls on interannual lake drainage behaviour. Finally, I upscale UAV ob- …
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Influence of meltwater on Greenland Ice Sheet dynamics
… the trigger mechanism for rapid drainage of a supraglacial lake. In three consecutive years, I find precursory basal slip and uplift in the lake basin generates tensile stresses that promote hydrofracture beneath the lake. As these precursors are likely associated with the introduction of …
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Influence of meltwater on Greenland Ice Sheet dynamics
… the trigger mechanism for rapid drainage of a supraglacial lake. In three consecutive years, I find precursory basal slip and uplift in the lake basin generates tensile stresses that promote hydrofracture beneath the lake. As these precursors are likely associated with the introduction of …
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Glacial stratigraphy of northwestern Cass County, North Dakota
… glaciolacustrine topography, 3) proglacia1 lake sediment, 4) wave-eroded glacial and lake sediments and 5) recent river sediment. Landforms within each of these areas include eskers, abandoned or overfit river channels, transverse ridges, ice thrust masses, kettles and beach deposits.</p> …
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GEOHERITAGE ASSESSMENT, MONITORING AND COMMUNICATION THROUGH MULTIDISCIPLINARY - 3D MODELLING APPROACH.
Questa tesi di dottorato ha lo scopo di sviluppare e testare strumenti innovativi e metodologie per la valutazione, il monitoraggio e la comunicazione del patrimonio geologico in ambienti a elevata dinamicità, concentrandosi su contesti glaciali, proglaciali e ambienti modellati dai processi …