Discussion
Which wind results from that surface layer over sloping ice?
Answer: B
Radiatively cooled air adjacent to the sloping ice becomes denser than the free air at the same level and drains downhill, reaching hurricane force where the terrain funnels it. The winds at Cape Denison average over 70 kilometres per hour throughout the year. Barrier winds are a genuine phenomenon in Antarctica too but arise from blocking rather than from drainage. Checking the units of each quantity catches a wrong formula before the arithmetic begins.
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