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What is smog?
- Oct 11, 2018 -

The smog, as the name suggests, is fog and sorrow. But the difference between fog and cockroaches is great. An aerosol system composed of particulate matter such as dust, sulfuric acid, and nitric acid in the air causes a visual impairment. The cockroach is the ash (haze).

A fog is an aerosol system consisting of a large number of tiny water droplets or ice crystals suspended in the near-surface air. It appears in the autumn and winter seasons (this is one of the reasons for the large-scale haze weather in the country in January 2013), and it is the product of condensation (or condensation) in the air near the ground. The presence of fog reduces the transparency of the air and makes the visibility worse. If the visibility of the target is reduced to less than 1000 meters, the weather phenomenon of condensation (or condensation) suspended in the near-surface air is called fog (Fog). .

霾 (mái), also known as ash (smoke) Airborne dust, sulfuric acid, nitric acid, organic hydrocarbons and other particles can also make the atmosphere turbid. This phenomenon of the target visibility of 1000-10000 meters is called light fog or Mist. The atmospheric humidity should be saturated when the fog is formed (if there is a large amount of condensation nuclei, the relative humidity may not reach 100% and saturation may occur). Since the light scattered by the mist composed of liquid water or ice crystals has little relationship with the wavelength, the mist appears to be milky white or cyan and gray.

Haze weather is a state of air pollution. Smog is a general expression of excessive levels of suspended particulate matter in the atmosphere, especially PM2.5 (aerodynamic equivalent diameter of particles less than or equal to 2.5 microns) is considered to cause haze. The "culprit" of the weather. As the air quality deteriorates, the haze weather phenomenon increases and the damage increases. In many areas of China, the haze weather phenomenon is incorporated into the fog as a warning for severe weather warning. Collectively referred to as "smog weather."

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