On The Temperature Profile and the Age Profile in the Central Part of Cold Ice Sheets
Abstract The generalized Glen’s law έ = έ 0 T n exp ( kθ ) is used to calculate die horizontal and vertical velocity profiles and from these the temperature and age profiles of cold ice sheets. It is shown that, by substituting for θ a function increasing linearly with height, velocity profiles for...
| Published in: | Journal of Glaciology |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Cambridge University Press (CUP)
1971
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1017/s0022143000012958 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000012958 |
| Summary: | Abstract The generalized Glen’s law έ = έ 0 T n exp ( kθ ) is used to calculate die horizontal and vertical velocity profiles and from these the temperature and age profiles of cold ice sheets. It is shown that, by substituting for θ a function increasing linearly with height, velocity profiles for all ice sheets are obtained which represent excellent approximations to the true ones, since, above a critical height h e where the deviation from linearity becomes large, the influence of temperature on ice flow becomes negligible. In a comparison of the present theory with Robin’s (1955) treatment a larger temperature difference Δ T of up to 30% is obtained. Furthermore the present theory yields an age considerably increased compared with Nye’s model; e.g. more than 50% at a relative height of h\H = 0·1. |
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