Traditional Culture Encyclopedia - Weather inquiry - What is the weather sign of smog?

What is the weather sign of smog?

The symbol of haze is two horizontally connected circles.

Haze, also known as haze and ash haze, refers to the turbidity phenomenon formed by the suspension of a large number of particles such as unexplained smoke and dust. The core substance of smog is dust particles suspended in the air, which are called aerosol particles in meteorology. In recent years, the occurrence frequency of "smog" weather phenomenon is getting higher and higher, which leads to the gradual deterioration of air quality.

Haze contains hundreds of atmospheric chemical particles, which intrude into human respiratory tract and lung lobes unsuspecting, thus causing respiratory diseases, cardiovascular diseases, blood system, reproductive system and other diseases, such as pharyngitis, emphysema, asthma, rhinitis, bronchitis and other inflammation. Long-term exposure to this environment will also induce lung cancer, myocardial ischemia and injury. Smog also often causes traffic accidents.

The main source of smoke:

It is mainly divided into two reasons: man-made and climate.

People have:

1, automobile exhaust.

2. Waste gas generated by burning coal for heating in winter in the north.

3. Waste gas from industrial production.

4. Dust generated by construction sites and road traffic.

5. Growing particles. The particle size of bacteria and viruses is equivalent to PM 0. 1 ~ PM 2.5. When the humidity and temperature in the air are appropriate, microorganisms will attach to particles, especially oil fume particles. After absorbing oil droplets, microorganisms will transform into more microorganisms, which will increase the growth of biotoxic substances in smog.

6. Dust "smog" will also appear in home decoration, and indoor dust will be filled.

Climate factors include:

1, the phenomenon of increasing static wind in horizontal direction.

2. There is an inversion in the vertical direction.

3. The increase of suspended particles and organic pollutants in the air. With the growth of urban population and industrial development, the number of motor vehicles has surged, resulting in a large increase in pollutant emissions and suspended solids.

Refer to the above? Baidu Encyclopedia-Smog (a large number of particles in the air that cannot be distinguished by the naked eye)