Which outcome occurs when strong unidirectional winds consistently encounter barchan dunes exceeding a height threshold?

💡 Explanation

Slipface avalanche intensifies sharply because exceeding a dune height threshold increases gravitational potential energy, causing more sand to move during avalanches via grainflow. Therefore, avalanche magnitude increases with dune height, rather than stasis or dampened erosion under constant sediment supply.

• Which geographical morphology develops given consistently unidirectional winds?
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