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 also makes this car washing industry very popular.

So what exactly is dust rain?

To form dust rain, the following four conditions must be met:

1。 But the soil in sandstorm 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。 However, the strong wind on the ground is the dynamic basis for the formation of dust rain and the dynamic guarantee for the long-distance transportation of dust rain.

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

4. In arid climate, sandstorms mostly occur in northern spring, which is an excellent evidence.

In spring, due to the long-term drought and insufficient vegetation coverage, the dust on the surface is easily blown up and transported when the strong wind comes, but the particle size of the dust is large and it is not easy to form suspension, which is a necessary condition to ensure the long-distance transportation of small particles, so it can not be transported for a long distance, which is the main reason why it is rare to only dust and raise sand in areas far away from the dust.

If the gale 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 is reduced to a certain extent, the floating dust will fall and the dust will fall on the ground. If it rains at this time, mud rain will form.

Therefore, dust rain will only form in a fixed place and environment, and it is precisely because of the smog all the year round that dust rain in Beijing is very easy to form. Therefore, the soil in the air will fall with the rain, which will have different degrees of influence on people, vehicles and buildings on the ground. Therefore, caring for the environment is everyone's responsibility.