Meteorological science, are fog and haze the same thing? How was it formed? How to tell the difference?

. Fog and haze are not the same thing. When there is sufficient water vapor, breeze and stable atmosphere, when the relative humidity reaches 100%, the water vapor in the air will condense into fine water droplets suspended in the air. , reducing visibility at ground level, this weather phenomenon is called fog.

Fog is caused by a large number of tiny water droplets or ice crystals suspended in the air near the ground, making the horizontal visibility less than 1 km; haze is caused by a large number of extremely fine particles floating evenly in the air, making the horizontal visibility... .Generally speaking, the difference between fog and haze mainly lies in the amount of water content: those with a water content of more than 90% are called fog, and those with a water content of less than 80% are called haze. Between 80% and 90%, it is a mixture of fog and haze, but the main component is haze.

Guo Rongfen, Chief Service Officer of Yunnan Provincial Meteorological Service Center. "Fog is a relatively large amount of water vapor, and haze is often mixed with fog to become what we often call haze, which is very small ultrafine particles in the air, namely PM2.5, which is harmful to the human respiratory tract... Meteorological experts introduce , haze, fog, and haze are a combination of words. The phenomenon of haze is very common in cities.

Guo Rongfen, chief service officer of the Yunnan Provincial Meteorological Service Center, said: "Haze is like a drug. It has both advantages and disadvantages. From the perspective of disasters, it is a disastrous weather and is a frequent visitor in autumn and winter. Fog is a natural phenomenon in which a large number of tiny water droplets or ice crystals are suspended in the air near the ground, reducing visibility to less than 1 km.

Haze is also called haze. In the "Surface Meteorological Observation Specifications" of the 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 10 kilometers generally turbid, making bright things in the distance appear yellow and red, and dark things appearing blue." Average relative When the relative humidity is less than 80% of atmospheric turbidity, the deterioration of visibility caused by blurred vision is caused by haze. When the relative humidity is greater than 90% of atmospheric turbidity, the deterioration of visibility caused by blurred vision is caused by fog. When the relative humidity is above When the atmospheric turbidity is 80 to 90%, the deterioration of visibility caused by blurred vision is caused by the mixture of fog and haze; but the main component is haze. The thickness of haze is relatively large, reaching about 1 to 3 kilometers.