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 “"Ice Cap"”.
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Changes in surging outlet glaciers of the Langjökull Ice Cap, Iceland
… Hagafellsjökull outlets of the Langjökull ice cap, Iceland. It utilises digital elevation models from 1986, 1997, 2004 and 2007 in order to assess topographic change. These changes are linked to the surging outlets in terms of alteration of the subglacial hydrological system. Flux of water …
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Exploring Controls on the Flow Dynamics of Devon Ice Cap using a Basal Friction Inversion
… dynamic contribution to mass loss from the ice caps of the High Arctic requires an improved understanding of the basal conditions of these ice bodies. An adjoint method numerical inversion is therefore applied to elucidate the basal and englacial conditions of Devon Ice Cap in the Canadian …
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Ablation on the ice cap of King George Island (Antarctica) : an approach from field measurements, modelling and remote sensing
… Peninsula, ablation on the King George Island ice cap was investigated during several summer seasons. Different methodological approaches were combined and the present glaciological and climatological knowledge of the ice cap compiled. The work focuses on surface energy balance modelling based …
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Télédétection micro-onde de surfaces enneigées en milieu arctique : étude des processus de surface de la calotte glaciaire Barnes, Nunavut, Canada
… This climate warming leads to recession of seaice extent and seasonnal snow cover, and also to large mass loss of the archipellago’s ice caps. One of the most southern ice cap, the Barnes Ice Cap, located on the Baffin Island, is no exception to significant mass loss and margins recession as …
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Climate sensitivity study with energy balance models
… between the seasonal cycle and the small ice cap instability, which is a possible mechanism for the initiation of glaciation in the northern hemisphere and southern hemisphere. Results from a two-dimensional energy balance model with a realistic land-ocean distribution show that the small …
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Oceanic control of the sea ice edge and multiple equilibria in the climate system
… fundamental mechanisms of atmosphere-ocean-sea ice interaction. Hierarchies of idealized models are invoked to argue that multiple equilibria and abrupt change are robust features of the climate system. The main finding is that meridional structure in poleward oceanic energy transport, which is …
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Implications of Martian polar insolation levels on the climatic cycling of volatiles
… insolation calculations for Mar's north polar cap for obliquities of 150, 250 and 450. This study found that the elevation of the northern ice cap above the surroundings results in the ice cap having more days of sunlight than previously thought.
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Quantifying glacier melt enhancement due to dust deposition during the 2022 melt season. Tungnaárjökull glacier, South Iceland
… impacts the glacier surface mass balance (SMB). Icelandic glaciers portray a high annual and inter-annual variability in SMB due to climate variability but deposition of mineral dust originating from glaciofluvial dust hotspots can have large impacts on summer ablation. The frequency of dust …
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Blink and You'll Miss It: An Investigation into Surging on Flade Isblink, Greenland
Mass loss from fringing ice caps and glaciers in Greenland accounted for 20% of the ice sheet’s mass loss between 2003 and 2008 and could be responsible for up to 11 mm of sea- level rise by the end of the century. This study therefore applies a 3D, full-Stokes glaciological flow model, Elmer/Ice, …
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Greenlandic ice archives of North Atlantic Common Era climate
… domineering force in shaping Earth’s landscape, climate, and ecology. Direct, quantifiable records of climatic phenomena are severely limited over much of the Common Era, necessitating high-resolution, naturally-derived proxies to extend climatic insights beyond the satellite and …
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Champions of the Arctic? A comparative analysis of the Arctic policies and practices of China and Japan
… in other areas of the world, with the Arctic ice-cap melting at a rapid pace. The ‘opening’ of the Arctic is changing its global role and the world is trying to keep up. Non-Arctic actors have shown great interest in the region, including China and Japan. In 2013, China and Japan were accepted …
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Remote Sensing Studies of Svalbard Glaciers
… aspects of the morphology and dynamics of the ice caps of Nordaustlandet, Svalbard. Data collection, methods of reduction and errors are discussed. Three principal topics are examined. First, as a preliminary to comprehensive radio echo sounding operations over Nordaustlandet, the ability of 60 …
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Insights into marine biological responses to Icelandic glacial outburst floods from remote sensing data
… and Grímsvötn volcano beneath the Vatnajökull ice cap, SE Iceland (64.4220° N, 16.7902° W) at least since 1940. Jökulhlaup (glacial outburst floods) frequency has increased but their magnitude has decreased. This study examines jökulhlaup effects on the marine environment at the Gígjukvísl, …
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Dielectric Properties of lce
… the dielectric behaviour of single crystals of ice from a temperate glacier and ice cores from the Greenland ice cap is described. A field investigation of the properties of snow on Axel Heiberg Island (Arctic Canada) is discussed. The permittivity of ice in the HF and VHF range is deduced to be …
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Assessing glacier retreat and landform production at the ‘debris-charged’ snout of Kvíárjökull, Iceland
Iceland is a critical location for the study of glacier fluctuations and landform production in response to climate change due to its diverse glacial legacy and its archive of aerial photographs that provide accurately dated records of glacier retreat and landform evolution from 1945. This study …
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Insights from geodynamic models into ice flow, mantle magmatism, and their interactions
… I model how the deglaciation of the Yellowstone ice cap caused a reduction in mantle pressures and enhanced melting 19-fold. I predict the additional melting segregates a globally-significant mass of CO2, potentially playing a role in positive feedbacks between deglaciation and climate. I suggest …
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Insights from geodynamic models into ice flow, mantle magmatism, and their interactions
… I model how the deglaciation of the Yellowstone ice cap caused a reduction in mantle pressures and enhanced melting 19-fold. I predict the additional melting segregates a globally-significant mass of CO₂, potentially playing a role in positive feedbacks between deglaciation and climate. I suggest …
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Fluctuations of the West Greenland Ice Sheet, independent ice caps and mountain glaciers during the twentieth century
The Greenland Ice Sheet contains enough water to raise global sea levels by ~7 metres, but predictions of the actual potential future contribution in a warming climate vary widely. These can be improved through a better understanding of how the whole ice sheet and its outlet glaciers have responded …
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Modeling the climatic sensitivity of the inception of the Fennoscandian Ice Sheet
Understanding the sensitivity of ice sheets to climate forcing is crucial for predicting future behavior of ice sheets. Multiple studies have analyzed the inception of the Quaternary ice sheets using time-dependent global climate models. The results have indicated that although carbon dioxide …
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