Beijing residents line up for hundreds of meters to wash their cars, and the employees of the car wash shop can't take care of eating. Why is this car wash shop so hot?

This is mainly because there was a dusty rain in Beijing two days ago. Because the destructive power of dust rain is that the rain contains sand, the vehicle will absorb a lot of dust outside the vehicle after air drying. Therefore, most vehicles will choose car washing, which makes this car washing industry very popular.

so what exactly is dust rain?

In order to form sandstorm rain, the following four conditions must be met:

1. But the soil in the dust storm mainly comes from the dust in the air and the soil on the ground. This is one of the basic conditions for the formation of dust rain.

2。 But the strong wind on the ground is the dynamic basis for the formation of dust rain, and it is also the dynamic guarantee for the long-distance transportation of dust rain;

3。 But the air state is unstable, which is an important condition of local thermodynamics, and the afternoon dusk is a clear proof of the importance of local thermodynamic conditions;

4. It is an excellent evidence that sandstorms and rains mostly occur in northern spring in arid climate and spring like mushrooms after rain.

In spring desert marginal areas, due to long-term drought and insufficient vegetation coverage, when strong winds come, dust on the surface is easily blown up and transported, but the grain size of sand is large, which is not easy to form suspension, which is a necessary condition to ensure the long-distance transport of small particles, so it is impossible to transport them long-distance, which is the main reason why it is rare to only dust and raise sand in areas far from dust.

If the wind lasts for a long time, the floating dust can be transported far away, and dust rain will appear in the passing area. When the wind speed decreases to a certain extent, the floating dust will drop and a dust-falling weather will appear on the ground. If it rains at this time, it will form mud rain.

So dust rain can only form in a fixed place and environment, and it is very easy to form dust rain in Beijing just because of the smog all the year round. So the soil in the air falls with the rain, which will affect people on the ground or vehicles and buildings to varying degrees. Therefore, caring for the environment is everyone's responsibility.