Basal thermal regimes

Glaciers are powerful agents of physical erosion. In a detailed geomorphological study of the glaciated Canadian Shield, Sugden (1978) concluded that erosional style was related primarily to the basal thermal regime of the ice. From the center of divergence on an ice cap. 

Step 2 - Ice sheet loading and basal thermal and hydrological regime... 

An important additional difference between the two materials lies in the thermal expansion coefficients. The room-temperature values for the linear thermal expansion coefficients perpendicular to and in the basal plane for GaN are about 25-30% higher for GaN compared with sapphire [12], which will lead to a stronger expansion of the GaN lattice with respect to the sapphire lattice during deposition, which in general takes place in the temperature regime of 600-1000 °C. 

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