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1000 2000 3000 -2000

Figure 68.3 Englacial flow fields in a longitudinal cross-section computed for the times indicated in the figures. (a) Horizontal flow speed (m day-1). (b) Vertical strain rate (10-4 day-1). Positive value indicates tensile strain rate.

-3000 -2000 -1000

1000 2000 3000 -2000

1000 2000 3000

Figure 68.3 Englacial flow fields in a longitudinal cross-section computed for the times indicated in the figures. (a) Horizontal flow speed (m day-1). (b) Vertical strain rate (10-4 day-1). Positive value indicates tensile strain rate.

of the sliding law. We assume n' = 1, and prescribe c(x) in order to reproduce the observed diurnal flow variations.

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