Th.--Sci. phys.--Grenoble 1, 1983. N°: 128.

Th. 3e cycle--Géophys. interne géochim.--Grenoble 1, 1984. N°: 92.

Deep-ice temperature measurements have been made in two surge-type glaciers in the Yukon Territory, Canada. Cold ice warming towards the bed was found in Trapridge Glacier and a model of basal ice temperatures predicts large regions of basal temperate ice. Thermal regulation of the surge behavior of this small glacier is inferred; theoretical considerations show that this hypothesis can reasonably be extended to large surging glaciers as well. Temperatures below 0°C were also recorded on Steele Glacier. An anomalously warm layer was detected at a depth of approximately 50 m. This is attributed to the severe crevassing associated with a glacier surge. Numerical modelling of the effects of water-filled crevasses in a cold glacier, refreezing and injecting latent heat into the ice, predicts temperature profiles very similar to that observed. The model further predicts long term maintenance of the resulting trapped water pockets and, in small surging glaciers, a thermal memory of the initial crevassing throughout the entire quiescent phase. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

A theory of thermal conduction instabilities that could account for many of the properties of surging glaciers is presented. A one-dimensional diffusion equation with advection is solved numerically using a variation of the Crank-Nicholson method. Geothermal and frictional heating are shown to dominate the melting of ice from the base of the glacier, and the water that is formed is assumed to flow in an approximately uniform sheet between glacier and bedrock. The sliding theory developed by Weertman is used to determine the effects of parameters such as geothermal heat flow, basal shear stress, and bedrock roughness on the behavior of surging glaciers. A cyclic evolution of the temperature profile near the bed of a surging glacier is discovered and is thought to be a principal factor in starting the surge and in determining the surge period. Some good correlation with observation is obtained when the theory is applied to models which resemble known surging glaciers. An attempt to predict the future surge behavior of the Rusty Glacier, Yukon (previously known as the "Fox" Glacier) from the temperature data of Classen and Clarke produced uncertain results. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

No description available.

Thesis (Ph.D.) in Earth Sciences--University of Maine, 2007. / Includes vita. Includes bibliographical references (leaves 96-107).

Thesis (M.S.)--University of Wyoming, 2009. / Title from PDF title page (viewed on Apr. 19, 2010). Includes bibliographical references (p. 32-40).

Thesis--Zürich. / Bibliography: p. [vii]-xiii.

Thesis (Ph. D., Geography)--University of Idaho, August 2008. / Major professor: Aladimir B. Aizen. Includes bibliographical references. Also available online (PDF file) by subscription or by purchasing the individual file.

Th.--Sci. phys.--Grenoble 1, 1975. N°: 137. / Publication n° 192 du Laboratoire de glaciologie du Centre national de la recherche scientifique. Bibliogr. p. 117-125.