Which feature predominates when dune migration encounters moisture gradient?

💡 Explanation

Parabolic dunes form because vegetation colonizes the humid areas, anchoring portions while dry zones erode via deflation; therefore arms trail windward, rather than the slip face advancing uniformly as in barchans affected by wind alone.

• Which pattern results because excessive freshwater reduces gyre density?
• Which outcome primarily occurs from downwelling's cascading effect in oceanic currents?
• What erosional outcome significantly increases where persistent katabatic winds encounter exposed bedrock outcrops?
• Which soil property alteration exemplifies accelerated pedogenesis under shifted climate regimes?
• Which process determines arc abandonment creating an oxbow lake after prolonged channel sinuosity?
• Which outcome occurs when wind exceeds saltation threshold?