How is the fog formed?

The physical phenomena produced by animals in autumn morning have the following explanations.

Fog is mostly caused by a phenomenon called inversion. Usually, the upper temperature is low and the lower temperature is high, but occasionally there will be an inversion phenomenon of "heating up and cooling down".

The inversion phenomenon is mostly formed in winter. At this time, the long and cold winter night makes the ground temperature drop, so does the temperature closest to the ground, while the temperature in the upper layer rises. Because low-level air and high-level air will not be easily mixed, if there is no strong wind coming, the inversion phenomenon will generally last for many days.

Because the density of low-level air is higher than that of high-level air, the upper and lower layers will not be mixed together, and fog will accumulate in the low-level air near the ground. If the air near the ground is cooled to a certain extent under the conditions of sufficient moisture, breeze and stable atmosphere, the moisture in the air will condense into tiny water droplets suspended in the air, which will reduce the visibility of the ground. This weather phenomenon is called fog. Fog is more common in spring from February to April. When the visibility in the atmosphere is lower than 1 km due to the condensation of suspended water vapor, meteorology calls this weather phenomenon fog. Conditions for fog formation: cooling, humidifying and increasing water vapor content.

adverse effect

When smog is heavily polluted, the symptoms of patients with heart disease and lung disease will be obviously aggravated, and healthy people will also have symptoms, especially cardiovascular and cerebrovascular diseases, respiratory diseases, children and the elderly.

Severe smog will cause different degrees of damage to the lungs, leading to a series of different degrees of symptoms such as dry throat, itchy throat, cough, yellow phlegm and even asthma.