How to overcome the adverse environment caused by temperature inversion

It hinders the vertical convection movement of the air and the diffusion of smoke, pollutants, and water vapor condensation. The inversion layer tens or even hundreds of meters thick is like a thick quilt covering the air. In the sky above the city, the pollutants near the ground have "no way out" and have no choice but to "stay put" and accumulate thicker and thicker. Smoke and dust cover the sky and the sun, and air pollution is bound to worsen.

At the same time, most air pollution poisoning incidents are related to temperature inversion. If a temperature inversion occurs for several consecutive days, air pollutants will accumulate in large quantities, making air pollution poisoning prone to occur.

The influencing factors:

1. Geographical location: Mid-latitude areas are more likely to produce subsidence inversions. In areas with latitude ±30°, dry air sinks, compresses and self-heats, with more sunny days and less rain. After self-heating, the temperature is higher than the air in the lower layer, which is more likely to cause a temperature inversion phenomenon. ?

2. Time factor: The distribution of the inversion layer will change with time. Taking the equator as an example, the sun shines directly on the Tropic of Cancer during the summer solstice, and mid-latitude areas are more likely to have temperature inversions. ?

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3. Weather factors: When there are few clouds at night, the ground heat dissipates faster, and the temperature drop rate also increases. This is because the difference between the ground temperature and the upper air temperature decreases, and radiation appears the next morning. The likelihood of temperature inversion is also reduced. Precipitation weather will reduce the probability of temperature inversion, and foggy weather will increase the probability of temperature inversion.

4. Terrain conditions: When there are many valleys and hills, the cold air at night is stagnant in the valleys and does not pass through with the upper-level hot air flow. The conditions for the formation of temperature inversion are locally met, which will more easily lead to the occurrence of temperature inversion. In coastal areas, cold air from the sea blows into the inland, causing the temperature inversion layer to narrow, and then a temperature inversion occurs on the coastal surface.

5. Level of air pollution: The heavier the air pollution, the higher the thickness of the inversion layer, and the more serious the inversion phenomenon.