The "inversion layer" and "inversion layer" of radiation inversion layer

When it comes to inversion, many people are not familiar with it. However, the abnormal weather changes caused by inversion layer have a great impact on people's production and life, and even bring great harm to people's lives and property. Many people have understood.

In the morning or evening of winter and spring, in cities and suburbs, it is often seen that after the smoke rises to a certain height, it floats horizontally and spreads everywhere. If there is no wind and the temperature drops sharply, the whole field of vision will soon become blurred. With the coming of smog, the weather is gloomy and the sun is dim, which makes people breathless, and at the same time, they will smell unpleasant smells such as soot. People with poor physical resistance will have chest tightness, cough, sore throat, vomiting, difficulty breathing and other symptoms. This is due to the formation of inversion layer and inversion layer in the air, which makes the low-level air polluted quickly.

What are inversion layer and inversion layer? Generally speaking, in the lower atmosphere, the temperature usually decreases with the increase of altitude. But sometimes the opposite situation may occur at some levels, and the temperature increases with the increase of height. This phenomenon is called inversion. The atmosphere with inversion phenomenon is called inversion layer.

There are several main reasons for the formation of inversion layer: first, radiation cooling on the ground; Second, air advection cooling; Third, the air sinks and heats up; The fourth is the turbulent mixing of air; The fifth is the inversion temperature formed on the front. According to different reasons, the inversion layer can be divided into radiation inversion layer, advection inversion layer, subsidence inversion layer, frontal inversion layer and turbulent inversion layer. But no matter what kind of inversion layer, it has certain influence on the weather.

In the inversion layer, the warmer and lighter air is located above the colder and heavier air, forming an extremely stable air layer, just like a pot cover, which seriously hinders the convective movement of air. Because of this, the water vapor, smoke dust and various harmful gases in the air near the inversion layer can't get to the sky, but can only float in the air layer below the inversion layer, which is beneficial to the formation of clouds and reduce them. More than half of the major public hazards in the modern world are related to the influence of inversion layer.

The inversion layer is very harmful to people's health. In order to avoid its adverse effects, protect the human environment and safeguard the safety of people's lives and property, on the one hand, we must know the inversion layer in the lower atmosphere in detail, find out its regularity, and provide reliable meteorological basis for the prevention and control of air pollution. On the other hand, necessary measures should be taken to prevent the occurrence of inversion layer, that is, reducing or eliminating pollution sources, vigorously planting trees, grasses and flowers, and beautifying the environment.