Approximate solution to the freezing of the ice-water system

1972 ◽  
Vol 8 (4) ◽  
pp. 1083-1086 ◽  
Author(s):  
Stephen D. Foss ◽  
Stephen S. T. Fan
Author(s):  
T. M Kyrke-Smith ◽  
R. F Katz ◽  
A. C Fowler

Antarctic ice streams are associated with pressurized subglacial meltwater but the role this water plays in the dynamics of the streams is not known. To address this, we present a model of subglacial water flow below ice sheets, and particularly below ice streams. The base-level flow is fed by subglacial melting and is presumed to take the form of a rough-bedded film, in which the ice is supported by larger clasts, but there is a millimetric water film which submerges the smaller particles. A model for the film is given by two coupled partial differential equations, representing mass conservation of water and ice closure. We assume that there is no sediment transport and solve for water film depth and effective pressure. This is coupled to a vertically integrated, higher order model for ice-sheet dynamics. If there is a sufficiently small amount of meltwater produced (e.g. if ice flux is low), the distributed film and ice sheet are stable, whereas for larger amounts of melt the ice–water system can become unstable, and ice streams form spontaneously as a consequence. We show that this can be explained in terms of a multi-valued sliding law, which arises from a simplified, one-dimensional analysis of the coupled model.


1982 ◽  
Vol 28 (98) ◽  
pp. 35-42 ◽  
Author(s):  
J. Jouzel ◽  
R. A. Souchez

AbstractA model for the isotopic composition in δD and δ18O of ice formed by refreezing at the glacier sole is developed. This model predicts relatively well the distribution of points representing samples from basal layers of an Arctic and an Alpine glacier on a δD–δ18O diagram. The frozen fraction which is the part of the liquid that refreezes can be determined for each basal ice layer. This may have implications on the study of the ice–water system at the ice–rock interface.


1987 ◽  
Vol 33 (114) ◽  
pp. 159-161 ◽  
Author(s):  
M.E.R. Walford ◽  
D.W. Roberts ◽  
I. Hill

AbstractThe dihedral angle of water at a grain boundary in ice is found, by measuring the optical focal length of lenticular water inclusions, to be 33.6 ± 0.7°. The new result leads to only minor revision of published experimental values of specific surface free energies in the ice–water system (Ketcham and Hobbs, 1969).


Desalination ◽  
1979 ◽  
Vol 29 (1-2) ◽  
pp. 191-196 ◽  
Author(s):  
Dudley W. Coillet
Keyword(s):  

1963 ◽  
Vol 30 (1) ◽  
pp. 21-27 ◽  
Author(s):  
G. Fabri ◽  
E. Germagnoli ◽  
I. F. Quercia ◽  
E. Turrisi

Sign in / Sign up

Export Citation Format

Share Document