SYMPOSIUM OF CHAMONIX ON PHYSICS OF THE MOVEMENT OF ICE- INTERNATIONAL ASSOCIATION OF SCIENTIFIC HYDROLOGY. PDF Download
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Languages : en
Pages :
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Languages : en
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Author: International Association of Scientific Hydrology
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Category : Glaciers
Languages : en
Pages : 393
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Author: International Association of Scientific Hydrology
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Category :
Languages : en
Pages : 394
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Author: International Association Hydrological Sciences
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Category :
Languages : en
Pages :
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Author: Malcolm Mellor
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Category : Glaciers
Languages : en
Pages : 184
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Category : Cold regions
Languages : en
Pages : 60
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Author: John F. Abel
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Category : Civil engineering
Languages : en
Pages : 56
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The mechanics of closure, exhibited by ice tunnels, can be understood by considering the ice as a viscous solid. The viscous solid will flow, when subjected to a force, at a rate dependent on the magnitude of the force, the area of relief open for flow, and the apparent viscosity of the viscous solid. In the case of the ice tunnels, the force inducing the flow is the weight of the overburden; the area of relief open for flow is the tunnel opening; and apparent viscosity is the resistance to flow exhibited by the ice. The closure of a rectangular opening made in ice was measured. Maximum closure occurs at the center of unsupported roof, wall, or floor spans. The vertical closure rate decreases negligibly approximately 2% from the center of a room to approximately 6 ft from the wall. From the point about 6 ft from the wall to the wall, the closure rate decreases about 30%. Approximately 30% of vertical closure at the center of the span is due to flexure of the floor and roof. The remaining 70% is due to shortening of the wall height; the major portion of this wall closure occurs at the bottom of the wall. Over 80% of closure due to flexure of the floor and roof results from flexure of the floor. (Author).
Author: Henri Bader
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Category : Glaciers
Languages : en
Pages : 28
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Density and air bubble pressure data obtained from ice cores from Site 2, Greenland, are analyzed to determine porosity at the pore close-off level, which is found to have a very small standard deviation. A theory of densification of bubbly ice is developed on the simple assumption that the rate of decrease in porosity is proportional to porosity and also proportional to the difference between absolute load pressure and air bubble pressure. The theory is remarkable in that it has led to derivation of a useful equation for approximating the value of the integral exp t to the m power (dt) for m> 0. (Author).
Author:
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ISBN:
Category : Science
Languages : en
Pages : 402
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Papers and abstracts from the Symposium on Ice and Climate, including the effects of ice sheets and glaciers on climate and climatic change.
Author: IGY World Data Center A: Glaciology
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Category :
Languages : en
Pages : 872
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