What word is used to describe the fog on the mountain?

Pronunciation: mái?

Radical: rain

Stroke: 22

Five strokes: FEEF

Basic explanation

1.？ A turbid image formed by a large number of particles such as smoke and dust suspended in the air? : yin ~

2.？ When the wind is rough, sand falls in the air and dust flies.

3.？ Ancient "buried", buried.

Group words: smog? Hey? Haze? Hazy days? Green haze? Haze? Atmosphere? Haze? Shen Yu? Haze wind

Homophonic: Hey? bury

Same department: ba? Rain? Hey? Snow? Lou. Hey? Frost zero? Hey? dysprosium (Dy)

Same stroke: Yi? Hey? Capsule? Hey? Hey? Hey? Top？ Hey? Hey? The third note of the major scale.

cause

As a natural phenomenon, smog has three factors. First, the phenomenon of static wind in the horizontal direction has increased. With the rapid development of urban construction, buildings are built higher and higher, which increases the friction coefficient of the ground and obviously weakens the airflow when passing through the urban area. The increase of static wind phenomenon is not conducive to the diffusion and dilution of atmospheric pollutants to the periphery of urban areas, and it is easy to accumulate high-concentration pollution in urban areas. The second is the phenomenon of vertical inversion. The inversion layer is like a pot cover over a city, which causes the inversion phenomenon that the temperature at high altitude is higher than that at low altitude. Under normal climatic conditions, pollutants diffuse from low altitude with high temperature to high altitude with low temperature and are gradually discharged into the atmosphere. Under the inversion phenomenon, the low-altitude temperature is lower, which leads to the retention of pollutants and cannot be discharged in time.

The third is the increase of suspended particulate matter. In recent years, with the development of industry, the increase of motor vehicles, the discharge of pollutants and the increase of suspended solids in the city have directly led to the decrease of visibility and made the whole city look gray. The formation of smog is closely related to the discharge of pollutants. In cities, motor vehicle exhaust and other smoke and dust emission sources emit micron-sized particles, which stay in the atmosphere. When adverse weather such as inversion and still wind appears, smog is formed. According to research, there are four regions with severe haze weather in China: Huanghuaihai region, Yangtze River basin, Sichuan basin and Pearl River Delta.

Weather classification

1, mild haze: air relative humidity is less than or equal to 80%, visibility is more than or equal to 5km and less than10km;

2. Mild haze: the relative humidity of the air is less than or equal to 80%, and the visibility is more than or equal to 3 kilometers and less than 5 kilometers;

2. Moderate haze: the air relative humidity is less than or equal to 80%, and the visibility is more than or equal to 2 kilometers and less than 3 kilometers;

3. Severe smog: the air relative humidity is less than or equal to 80%, and the visibility is less than 2 kilometers.