How are wavy sand dunes formed in deserts? One thing is for sure: no human intervention!
August 13, 2024
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Of course, there is no human intervention in the formation of these shapes. The share of wind in these waveforms is quite large. Bride, Let’s get into the
Of course, there is no human intervention in the formation of these shapes. The share of wind in these waveforms is quite large.
Bride, Let’s get into the details on the topic.
Undulating sand dunes are formed by the effect of the force exerted by the wind on the grains of sand on the ground.
Three different forces determine how a grain of sand will move under the influence of the wind. gravity, Not only does it keep the grains of sand firmly on the ground, it also ensures that the grains of sand are carried in the direction the wind blows.
In addition, the pressure difference that occurs when the wind moves over the surface of the sand grains, It creates a driving force on the grain. How high the grains of sand will rise and how far they will be carried by the wind; The shape, density and mass determine the speed of the wind.
For example, sand grains with a high mass and density can only be dragged by rolling over the ground.
Some grains rise slightly due to the effect of buoyancy, remain in the air for a short time and then fall back to the ground. Very small grains are transported to larger and longer distances.
These differences in the motion of particles are formation of asymmetric wave-shaped sand dunes causes. While one slope of these hills is steep, the slope of the other slope is low.
In essence, these forms are It is also seen in smaller sand deposits called sand ripples. The height of these structures usually varies between 4 and 50 cm.
Sources: The Planetary Society, Tubitak Bilim Genç
Ashley Johnson is a science writer for “Div Bracket”. With a background in the natural sciences and a passion for exploring the mysteries of the universe, she provides in-depth coverage of the latest scientific developments.