Although this research may sound very terrestrial, there are applications that go far beyond our planet.
"Our landscape-scale experiment suggests that the alignment of aeolian dunes can be used to determine wind forcing patterns on the Earth and other planetary bodies," writes Clément.
For example, Mars and the Saturnian moon Titan are known to possess vast dune fields, shaped by persistent wind-shaping (aeolian) processes. Already, planetary scientists use Mars' beautiful barchan dunes to glean information about prevailing wind direction on the red planet's surface.
NEWS: Curiosity Will Encounter Mars' Moving Dunes
But, as this research shows, two prevailing winds contribute to a dune direction compromise. This means that although we may see a very definite orientation in Mars dunes, it doesn't necessarily mean there is only one prevailing wind - there could be seasonal shifts too.
Source: New Scientist