Results 261 to 270 of about 63,804 (307)
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Proceedings of the Physical Society, 1940
The internal mechanism of glacier flow has been studied by examining the crystal textures of samples of snow and ice from different parts of Alpine glaciers, and by taking strain-measurements within the glaciers themselves. The results show that under the influence of glacier flow firn, a compacted snow covering the upper regions of glaciers, is ...
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The internal mechanism of glacier flow has been studied by examining the crystal textures of samples of snow and ice from different parts of Alpine glaciers, and by taking strain-measurements within the glaciers themselves. The results show that under the influence of glacier flow firn, a compacted snow covering the upper regions of glaciers, is ...
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Geological Society of America Bulletin, 1954
Vigorous attack is currently being made on glacier flow by field studies, laboratory investigations, and theoretical analyses. Knowledge of the physical properties and behavior of ice deep within glaciers remains unsatisfactory, because laboratory experiments do not reproduce the relations of time and temperature existing in the natural environment. It
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Vigorous attack is currently being made on glacier flow by field studies, laboratory investigations, and theoretical analyses. Knowledge of the physical properties and behavior of ice deep within glaciers remains unsatisfactory, because laboratory experiments do not reproduce the relations of time and temperature existing in the natural environment. It
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2009
As mentioned in the introduction (Chapter 1), the size of land ice masses spans several orders of magnitude, from large ice sheets of a few thousand kilometres in diameter down to small glaciers of a few hundreds of metres in length. Consequently, the scaling given for ice sheets in Chapter 5 [Eqs.
Ralf Greve, Heinz Blatter
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As mentioned in the introduction (Chapter 1), the size of land ice masses spans several orders of magnitude, from large ice sheets of a few thousand kilometres in diameter down to small glaciers of a few hundreds of metres in length. Consequently, the scaling given for ice sheets in Chapter 5 [Eqs.
Ralf Greve, Heinz Blatter
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Journal of Applied Physics, 1956
The mass of ice varies along the length of a glacier because of the accumulation of snow in its upper regions and the ablation of ice in the lower regions. This mass change brings about variable speeds of flow and complex streamlines. General equations are derived using a type of plug flow for ice for the following: (1) glaciers of constant arbitrarily
Lawrence E. Nielsen, F. D. Stockton
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The mass of ice varies along the length of a glacier because of the accumulation of snow in its upper regions and the ablation of ice in the lower regions. This mass change brings about variable speeds of flow and complex streamlines. General equations are derived using a type of plug flow for ice for the following: (1) glaciers of constant arbitrarily
Lawrence E. Nielsen, F. D. Stockton
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1993
As a geophysical fluid dynamics phenomenon, glacier motion has features in common with some of the other terrestrial and planetary flows considered in this book, but it also has a number of special features that give it a character of its own. It can be compared to mantle flow and convection: both involve slow flow of essentially incompressible fluids ...
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As a geophysical fluid dynamics phenomenon, glacier motion has features in common with some of the other terrestrial and planetary flows considered in this book, but it also has a number of special features that give it a character of its own. It can be compared to mantle flow and convection: both involve slow flow of essentially incompressible fluids ...
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Fast glacier flow: Ice streams, surging, and tidewater glaciers
Journal of Geophysical Research: Solid Earth, 1987Fast flowing glaciers are unusual but important. Jakobshavns Glacier in western Greenland illustrates this point (Figure 1). Considered to be the world's fastest glacier, its maximum observed flow rate (measured in midsummer near the floating terminus) is 8360 m yr−1 [Lingle et al., 1981].
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Flow Mechanism of Glaciers on Soft Beds
Science, 1995Subhourly measurements of bed deformation, bed shear strength, subglacial water pressure, and surface speed at Storglaciären, a glacier in northern Sweden, showed that the shear-strain rates of the bed decrease during periods of high water pressure and surface speed.
N R, Iverson +3 more
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Modelling ice flow in various Glacier zones
Journal of Applied Mathematics and Mechanics, 2001The authors propose a simplified model of plane isothermal stationary ice flow in the surface part, shelf and transition region of ice and ice-shelf interacting with the sea. The results of dynamics analysis of the ice interface region are presented for axisymmetric ice flow.
Wilchinsky, A. V., Chugunov, V. A.
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Detecting Glacier Surface Motion by Optical Flow
Photogrammetric Engineering & Remote Sensing, 2018In this study, we assessed the feasibility of using optical flow, in particular, large displacement optical flow (<small>LDOF</small>) method as a possible solution to obtain surface movement data to derive ice flow velocities in a glacier.
Lenzano, María Gabriela +4 more
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Effects of Basal Debris on Glacier Flow
Science, 2003Glacier movement is resisted partially by debris, either within glaciers or under glaciers in water-saturated layers. In experiments beneath a thick, sliding glacier, ice containing 2 to 11% debris exerted shear traction of 60 to 200 kilopascals on a smooth rock bed, comparable to the total shear traction beneath glaciers and contrary to the usual ...
Neal R, Iverson +7 more
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