How are playas, lunettes, and linear dunes related in Australian deserts?

In Australian deserts, the relationship between playas, lunettes, and linear dunes is primarily driven by wind action and climatic change.1

• Playas and Lunettes: Playas are susceptible to wind erosion, particularly when their clay and salt crusts dry and flake. These sediments are deflated and deposited on the leeward side of the playa, forming crescentic foredunes known as lunettes.1
• Linear Dunes: The association between these features may be causative. It has been proposed that linear dunes developed as accumulations of sand trapped in the lee of growing lunettes.1

This geomorphic relationship is highly dependent on historical climatic shifts. During periods of peak eolian (wind) activity, these features formed in tandem, with the alluvium transported by rivers to the lowlands serving as the primary source material for the sand dunes. While some dunes in regions like the Murray Basin have since been stabilized by increased precipitation, the active dune fields in central Australia continue to reflect the continent's prevailing aridity.123