According to the word meaning: haze is also called haze (haze). The dust, sulfuric acid, nitric acid, organic hydrocarbon and other particles in the air can also make the atmosphere turbid, the visual field blurred and the visibility worsened. If the horizontal visibility is less than 10000 meters, the visual barrier caused by the aerosol system composed of non-aqueous substances is called haze or haze.
Haze is also known as atmospheric brown cloud. In the ground meteorological observation specification of China Meteorological Administration, haze weather is defined as: 'a large number of extremely fine dry dust particles float evenly in the air, making the air with horizontal visibility less than 10km generally turbid, making the bright objects in the distance slightly yellow and red, and the dark objects slightly blue. '
According to the network data, there are four areas with severe haze in China: the Huanghuai sea area, the Yangtze River Valley, Sichuan Basin and the Pearl River Delta.
How is haze formed? What is the cause of haze?
1. The main factors of low air pressure and no air flow. Because the air is not flowing, the tiny particles in the air gather and float in the air.
2. The ground is dusty and the air humidity is low. People and vehicles on the ground stir up the dust.
3. Automobile exhaust is the main pollutant emission. In recent years, there are more and more automobiles in the city. Automobile exhaust is a factor of haze.
4. Secondary pollution produced by the factory.
5. CO2 and other pollutants emitted by heating in winter.
Special note: the above reasons are of no priority or priority. With more or more scientific explanations, sihai.com will keep updating and paying attention to them.