The Growth of the Glacier Crystal Some Further Notes

Seligman, G.

doi:10.3189/s0022143000012582

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“…It is well established that for polycrystalline ice under no (or very low) stress, the crystal size increases with time at a rate dependent on the temperature (Stephenson, 1967; Gow, 1969, 1970; Budd, 1972; Gow and Williamson, 1976, for Antarctic ice; Herron, 1982, for Greenland ice; Seligman, 1949, 1950; Kamb, 1964, for laboratory observations). Results from deep ice cores collected from Byrd Station, Antarctica (Gow and Williamson, 1976), Dome C, Antarctica (Duval and Lorius, 1980), Vostok, Antarctica (Korotkevich and others, 1978), Law Dome, Antarctica (Young and others, 1985) and Camp Century, Greenland (Herron, 1982) indicate that the increase in crystal size with time and depth can be disturbed by other factors.…”

Section: Introductionmentioning

confidence: 99%

The steady-state crystal size of deforming ice

Jacka

1994

Ann. Glaciol.

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Previous studies have established that, together with the development of a preferred crystal-orientation fabric in ice undergoing creep deformation to high strains, there also develops a tertiary equilibrium crystal size, i.e. the crystal size, rather than affecting the creep rate, is a result of the deformation to large strains.Equilibrium crystal size is considered here as a "balance" between crystal growth with time as a function of temperature and crystal change as a result of temperaturedependent deformation. The temperature effects in these two processes (Arrhenius relation) are similar and consideration of the activation energies for the two processes indicates that it may be appropriate to cancel them, yielding a dependence of equilibrium crystal size on stress alone. The results from laboratory experiments of steady-state crystal size plotted as a function of stress support the above proposition.The possibility of using the relationships between steady-state crystal size and deviatoric stress as a polar ice-mass piezometer is discussed.

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Section: Introductionmentioning

confidence: 99%

The steady-state crystal size of deforming ice

Jacka

1994

Ann. Glaciol.

View full text Add to dashboard Cite

show abstract

The Growth of the Glacier Crystal Some Further Notes

Cited by 1 publication

References 2 publications

The steady-state crystal size of deforming ice

The steady-state crystal size of deforming ice

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