In the dust storms on Mars guilty "pryguchie" grains
Murillo Almeida from the Federal University of Ceara in Fortaleza (Brazil) and his colleagues developed a model whereby the grains on Mars must podskakivat 100 times higher above the surface than Earth, and the speed of their movement should be 10 times more, reports New Scientist. This explains the size and length of dunes on the Red planet.
The length and height of sand dunes on it in about ten times better than the dimensions of sand dunes on Earth. MARTION MISSION air is discharged, and therefore, in order to raise sand, wind force must be very high. To raise grain in the Martian air, its speed must be at least meters per second.
Such gusts of wind rarely occur on the red planet, perhaps even every few years. But when the wind lifts them into the air, they really fly. According to one of the researchers Erica Parteli, low gravity on Mars allows the sand particles remain in the atmosphere longer than on Earth. "Pryguchie" grain, which, while falling into the air ndd other grain, can explain how, despite the thin atmosphere of the planet formed dust storms.