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Author: Samuel C. Colbeck Publisher: ISBN: Category : Avalanches Languages : en Pages : 24
Book Description
Grain growth, bond growth and densification of wet snow are described in terms of the distribution of equilibrium temperature in the snow matrix. At high water saturations the equilibrium temperature increases with grain size; hence, small particles melt away as large particles grow. Melting also occurs at the integrain bonds, causing a low strength and rapid densification. At low saturations the equilibrium temperature is determined by the capillary pressure and the particle sizes have only a second order effect. Therefore, grain growth proceeds slowly and, even at large over-burden pressures, no intergrain melting occurs. At low saturations the water 'tension' acts through a finite area, thus large attractive forces exist between the grains, and the strength of the snow matrix is large. (Author).
Author: Samuel C. Colbeck Publisher: ISBN: Category : Avalanches Languages : en Pages : 24
Book Description
Grain growth, bond growth and densification of wet snow are described in terms of the distribution of equilibrium temperature in the snow matrix. At high water saturations the equilibrium temperature increases with grain size; hence, small particles melt away as large particles grow. Melting also occurs at the integrain bonds, causing a low strength and rapid densification. At low saturations the equilibrium temperature is determined by the capillary pressure and the particle sizes have only a second order effect. Therefore, grain growth proceeds slowly and, even at large over-burden pressures, no intergrain melting occurs. At low saturations the water 'tension' acts through a finite area, thus large attractive forces exist between the grains, and the strength of the snow matrix is large. (Author).
Author: S. C. Colbeck Publisher: ISBN: Category : Languages : en Pages : 17
Book Description
The grains in seasonal snow undergo rapid and radical transformations in size, shape, and cohesion. These grain characteristics affect all of the basic properties of snow. Snow is characterized as either wet or dry depending on the presence of liquid water. Wet snow is markedly different at low and high liquid contents. Dry snow is characterized as either an equilibrium form or a kinetic growth form; that is, it is either well rounded or faceted. Of course, many snow grains display either transitional features between two of these categories or features which arise from other processes. Snow is classified depending on the dominant processes of its metamorphism.
Author: Trevor D. Davies Publisher: Springer Science & Business Media ISBN: 3642751121 Category : Technology & Engineering Languages : en Pages : 474
Book Description
Seasonal Snowpacks examines the processes which control the chemistry of seasonal snowcover and provides detailed information on the biogeographical distribution of snow (e.g. urban, alpine snowpacks), snow composition (e.g. micropollutants, stable isotopes) or the physical and biological processes which influence the chemical changes in snow (e.g. wind, microbiological activity). The fluxes of chemicals at the snow-atmosphere and snow-soil interfaces are examined, as are processes which modify composition within the snowcover. It is the first book in which the reader will find a comprehensive overview of the theoretical concepts, latest measurement techniques, process-oriented research methods, and models of studies in snow chemistry. The linkages between snow chemistry, atmospheric chemistry and hydrology will make this book of use to both research workers and students in the physical and biological sciences and to natural resource management personnel.
Author: Samuel C. Colbeck
Author: Samuel C. Colbeck
Author: R. A. Sommerfeld
Author: Samuel C. Colbeck
Author: S. C. Colbeck
Author: R. A. Sommerfeld
Author: 
Author: Cold Regions Research and Engineering Laboratory (U.S.)
Author: United States. National Weather Service
Author: Trevor D. Davies
Author: